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SECTION 7D

AUTOMATIC TEMPERATURE CONTROL HEATING, VENTILATION, AND AIR CONDITIONING SYSTEM

Caution : Disconnect the negative battery cable before removing or installing any electrical unit or when a tool or equipment could easily come in contact with exposed electrical terminals. Disconnecting this cable will help prevent personal injury and damage to the vehicle. The ignition must also be in LOCK unless otherwise noted.

SPECIFICATIONS

Fastener Tightening Specifications

Application
N•m
Lb-Ft
Lb-In
Blower Motor Resistor Screws
1.2
-
11
Control Assembly Retaining Screws
2
-
18

SCHEMATIC AND ROUTING DIAGRAMS

A/C Sensors/Defoggers and A/C Compressor Controls Diagram


J5B17D01
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A/C Blower and Motor Controls Diagram


J5B17D02
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DIAGNOSIS

GENERAL A/C DIAGNOSTICS

Refer to Section 7B, Manual Control Heating, Ventilation, and Air Conditioning System for details of the following procedures:

V5 SYSTEM AIR CONDITIONING AND AUTOMATIC TEMPERATURE CONTROL (ATC)

Self-Diagnostic Circuit Check

The GM Daewoo fully automatic temperature controller (FATC) contains a self-diagnosis function to aid in finding any problem with the system. To enter the diagnostic mode, perform the following procedure:
  1. Turn the ignition to ON.
  2. Set the temperature control to 26°C (79°F).
  3. Within 3 seconds, push the AUTO and the MODE switches simultaneously, more than three times.
  4. Count the number of times the temperature indicator screen blinks.
  5. If there are no error codes set, the screen will not blink. When the controller indicates an error code, proceed to the table for that code.
  6. Push the OFF switch to return the controller to its normal functions.

J5B17D03
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Automatic Temperature Controller Does Not Operate When Ignition Is ON

Step Action Value(s) Yes No
1
Check the fuse F7.
Is fuse F7 blown?
-
Go to Step 2
Go to Step 3
2
Replace fuse F7.
Is the repair complete?
-
System OK
-
3
  1. Remove the controller.
  2. Measure the voltage between connectors A5 and A14.
Is the voltage within the specified value?
11-14 v
Go to Step 4
Go to Step 5
4
  1. Check the controller for damage.
  2. Replace the controller if it is damaged.
Is the repair complete?
-
System OK
-
5
Check the voltage between terminal A1 and ground.
Is this voltage as specified?
0 v
Go to Step 6
Go to Step 7
6
  1. Check the wiring harness between fuse F7 and the terminal A5 for damage.
  2. Replace the wiring harness if it is damaged.
Is the repair complete?
-
System OK
-
7
  1. Check the wiring harness between terminal A14 and ground G203 for damage.
  2. Repair the wiring harness, or ground connection as required.
Is the repair complete?
-
System OK
-

J3B17D04
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Controller Does Not Illuminate When Light Switch Is ON

Step Action Value(s) Yes No
1
Check other instrumentation lights.
Are those lights also off?
-
Go to Step 2
2
  1. Remove the controller.
  2. Check the voltage between terminals A3 and A4 of the controller connector.
Is the voltage within the specified value?
11-14 v
Go to Step 4
Go to Step 3
3
Repair the wiring harness between splice S204 and controller connector terminal A4 or between splice S203 and controller connector terminal A3.
Is the repair complete?
-
System OK
-
4
Check the illumination lamps.
Is one burned out?
-
Go to Step 5
Go to Step 6
5
Replace the burned out illumination lamp.
Is the repair complete?
-
System OK
-

No Hot Air From Blower

Step Action Value(s) Yes No
1
Check the coolant level.
Is the coolant level correct?
-
Go to Step 3
Go to Step 2
2
Add coolant as needed.
Is the heater operating?
-
System OK
Go to Step 3
3
  1. Turn the ignition to ON.
  2. Observe the temperature indication screen of the controller.
Does the digit flash on and off?
-
Go to Step 4
Go to Step 5
4
Run a self-diagnosis circuit check.
Does the display indicate a defect code?
-
Go to the table for the code that flashes
Go to Step 7
5
Observe the blower motor operation.
Is the blower motor functioning at all?
-
Go to Step 6
6
Use the blower push switch to cycle the blower through its different speeds.
Does the motor function at different speeds?
-
Go to Step 7
7
  1. Run the blower and operate the MODE push switch manually.
  2. Check for airflow out the various outlets.
Does the air flow from the different outlets as it should?
-
Go to Step 9
Go to Step 8
8
  1. Remove the heater outlet and check for obstructions.
  2. Remove any obstructions found.
Is the heater operating?
-
System OK
Go to Step 9
9
Observe the air mix door (AMD) motor while changing the temperature setting from 18 to 32°C (64 to 90°F) and then from 32 to 18°C (90 to 64°F).
Is the AMD motor functioning properly?
-
Go to Step 10
10
Check the coolant hoses for leaks or kinks.
Are the coolant hoses in good condition?
-
Go to Step 12
Go to Step 11
11
Repair any problem with the coolant hoses.
Is the heater operating?
-
System OK
Go to Step 12
12
Check the surge tank cap.
Is the surge tank cap in good condition?
-
Go to Step 14
Go to Step 13
13
Repair or replace the surge tank cap as needed.
Is the heater operating?
-
System OK
Go to Step 14
14
  1. Set the A/C switch to OFF.
  2. Set the temperature control to 32°C (90°F).
  3. Set the blower motor speed to full high (all segments illuminated on the display).
  4. Remove the surge tank cap.
  5. Start the vehicle and run the engine at idle.
  6. Watch for the flow of the coolant when the thermostat opens.
Does the coolant flow?
-
Go to Step 16
Go to Step 15
15
  1. Check for
    • A faulty thermostat.
    • A failed coolant pump impeller.
    • A restriction in the cooling system.
  2. Make repairs as needed.
Is the repair complete?
-
System OK
-
16
Check the temperature of the heater inlet and outlet hoses by feel.
Is the heater inlet hose hot and the outlet hose warm?
-
Go to Step 18
Go to Step 17
17
Back flush or replace the heater core.
Is the repair complete?
-
System OK
-
18
Check the vehicle for cold air leaks at the
  • Dash.
  • Heater cases.
  • Vents.
Are any leaks found?
-
Go to Step 20
Go to Step 19
19
Repair any cold air leaks.
Is the repair complete?
-
System OK
-
20
Check the coolant temperature sensor using the tests in "Code 3 - Coolant Temperature Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 21
Go to Step 22
21
Repair or replace the sensor, the wiring, or the controller as required.
Is the repair complete?
-
System OK
-
22
Check the in-car sensor using the tests in "Code 1 - In-Car Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 23
Go to Step 24
23
Repair or replace the sensor, the wiring, or the controller as required.
Is the repair complete?
-
System OK
-
24
Check the ambient air temperature sensor using the tests in "Code 2 - Ambient Air Temperature Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 25
Go to Step 26
25
Repair or replace the sensor, the wiring, or the controller as required.
Is the repair complete?
-
System OK
-
26
Check the sun sensor using the tests in "Code 5 - Sun Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 27
Go to Step 28
27
Repair or replace the sensor, the wiring, or the controller as required.
Is the repair complete?
-
System OK
-
28
Replace the ATC controller.
Is the repair complete?
-
System OK
-

No Cool Air From Blower

Step Action Value(s) Yes No
1
  1. Turn the ignition to ON.
  2. Observe the temperature indication screen of the controller.
Does the digit flash on and off?
-
Go to Step 2
Go to Step 3
2
Run a self-diagnosis circuit check.
Does the display indicate a defect code?
-
Go to the table for the code that flashes.
Go to Step 7
3
Observe the blower motor operation.
Is the blower motor functioning at all?
-
Go to Step 4
4
Use the blower push switch to cycle the blower through its different speeds.
Does the motor function at different speeds?
-
Go to Step 5
5
  1. Run the blower and operate the MODE push switch manually.
  2. Check for airflow out the various outlets.
Does the air flow from the different outlets as it should?
-
Go to Step 7
Go to Step 6
6
  1. Remove the heater outlet and check for obstructions.
  2. Remove any obstructions found.
Is the heater operating?
-
System OK
Go to Step 9
7
Observe the air mix door motor (AMD) while changing the temperature setting from 18 to 32°C (64 to 90°F) and then from 32 to 18°C (90 to 64°F).
Is the AMD motor functioning properly?
-
Go to Step 8
8
Perform the checks found in "Insufficient Cooling Diagnosis."
Is the system operating normally now?
-
System OK
Go to Step 9
9
Place the controller in the AUTO mode.
Is smoke taken into the intake port of the in-car sensor?
-
Go to Step 12
Go to Step 10
10
Check the intake hose for the in-car sensor.
Is the hose in good condition?
-
Go to Step 12
Go to Step 11
11
Repair or replace the intake hose.
Is the repair complete?
-
System OK
-
12
Check the in-car sensor using the tests in "Code 1 - In-Car Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 13
Go to Step 14
13
Repair or replace the sensor, the wiring, or the controller as required.
Is the repair complete?
-
System OK
-
14
Check the ambient air temperature sensor using the tests in "Code 2 - Ambient Air Temperature Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 15
Go to Step 16
15
Repair or replace the sensor, the wiring, or the controller, as required.
Is the repair complete?
-
System OK
-
16
Check the sun sensor using the tests in "Code 5 - Sun Sensor Error."
Is there a problem indicated in the sensor, the sensor wiring, or the controller?
-
Go to Step 17
Go to Step 18
17
Repair or replace the sensor, the wiring, or the controller as required.
Is the repair complete?
-
System OK
-
18
Perform the coolant temperature sensor test.
Is the coolant temperature sensor malfunctioning?
-
Go to Step 19
Go to Step 20
19
Replace the coolant temperature sensor.
Is the repair complete?
-
System OK
-
20
Replace the ATC controller.
Is the repair complete?
-
System OK
-

J5B17D04
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Blower Motor Does Not Run At All

Step Action Value(s) Yes No
1
  1. Turn the ignition to ON.
  2. Observe the temperature indication screen of the controller.
Does the digit go on and off?
-
Go to Step 2
Go to Step 3
2
Run a self-diagnosis circuit check.
Does the display indicate a defect code?
-
Go to the table for the code that flashes.
-
3
Check fuse F7 in the I/P fuse block.
Is this fuse in good condition?
-
Go to Step 5
Go to Step 4
4
Replace fuse F7.
Is the repair complete?
-
System OK
-
5
Check fuse EF3 in the engine fuse block.
Is this fuse in good condition?
-
Go to Step 7
Go to Step 6
6
Replace fuse EF3.
Is the repair complete?
-
System OK
-
7
  1. Turn the ignition switch to ON.
  2. Measure the voltage between ground and terminal 87(Violet) of the blower relay.
Is the voltage within the specified value?
11-14 v
Go to Step 15
Go to Step 8
8
Measure the voltage between ground and terminal 86 (Brown) at the blower relay.
Is the voltage within the specified value?
11-14 v
Go to Step 10
Go to Step 9
9
  1. Turn the ignition switch to OFF.
  2. Check circuit (Brown) between terminal 86 of the blower relay to F7 in the I/P fuse block.
  3. Repair any problem found in the wiring or terminals at the relay socket or connector C201.
Is the repair complete?
-
System OK
-
10
Measure the voltage between ground and terminal 30 (Red) at the blower relay.
Is the voltage within the specified value?
11-14 v
Go to Step 12
Go to Step 11
11
  1. Turn the ignition switch to OFF.
  2. Check circuit (Red) between terminal 30 of the blower relay to EF3 in the engine fuse block.
  3. Repair any problem found in the wiring or terminals at the fuse block connector C105, connector C202, or at the relay socket.
Is the repair complete?
-
System OK
-
12
  1. Turn the ignition switch to OFF.
  2. Check the continuity in the wiring harness between the blower relay terminal 85 (Black) and ground.
Does the ohmmeter show the specified value?
≈ 0 Ω
Go to Step 14
Go to Step 13
13
Repair any problem found in terminal 85 at the relay connector, circuit (Black), Connector C201, or ground G201.
Is the repair complete?
-
System OK
-
14
Replace the blower relay.
Is the repair complete?
-
System OK
-
15
  1. Turn the ignition switch to OFF.
  2. Disconnect the wiring harness at the blower motor.
  3. Turn the ignition switch to ON.
  4. Measure voltage between ground and blower connector 1 (Yellow).
Is the voltage within the specified value?
11-14 v
Go to Step 17
Go to Step 16
16
  1. Turn the ignition switch to OFF.
  2. Check circuit (Yellow) between blower connector terminal 1 and blower relay terminal 87.
  3. Repair any problem found in the wiring or a connector terminal at the blower connector, connector C208, or the blower relay socket.
Is the repair complete?
-
System OK
-
17
Measure the resistance between the connector terminals on the blower motor.
Does the resistance match the specified value?
≈ 5 Ω
Go to Step 19
Go to Step 18
18
Replace the blower motor.
Is the repair complete?
-
System OK
-
19
Measure the resistance of circuit (Violet) between terminal 2 of the blower connector and terminal 30 of the Max HI relay and terminal 6 of the power transistor.
Does the resistance match the specified value?
≈ 0 Ω
Go to Step 21
Go to Step 20
20
Repair the problem in circuit (Violet).
Is the repair complete?
-
System OK
-
21
Measure the resistance of circuit (Black) from terminal 3 of the power transistor connector to ground.
Does the resistance match the specified value?
≈ 0 Ω
Go to Step 23
Go to Step 22
22
  1. Trace circuit (Black) from terminal 3 of the power transistor connector and terminal 87 of the Max HI relay to ground G203.
  2. Repair any problem found in the wiring, ground G203.
Is the repair complete?
-
System OK
-
23
Replace the ATC controller.
the repair complete?
-
System OK
-

Mode Control Do Not Work

Refer to "A/C Blower and Motor Controls Diagram"for the electrical schematic diagram of the circuits described in this procedure.

Mode Controls Do Not Work

Step Action Value(s) Yes No
1
Measure the voltage between terminal 4 and terminal 5 of the mode motor.
Is the voltage within the specified value for motor?
11-14 v
Go to Step 3
Go to Step 2
2
  1. Check fuse F7?
  2. Check the connector and circuit (Brown and Black) for any wiring or terminal problems.
  3. Repair any problems found.
Is the repair complete?
-
System OK
-
3
  1. Using the Motor Control Table, measure the voltages at the specified terminals of the specified motor connectors.
  2. Change the mode settings and observe the voltage changes.
Are the voltages as specified?
See the "Motor Control Table"
Go to Step 4
Go to Step 5
4
Replace the motor that does not operate properly.
Is the repair complete?
-
System OK
-
5
  1. Using the Motor Control Table, measure the voltages at the specified terminals of the specified controller connectors.
  2. Change the mode settings and observe the voltage changes.
Are the voltages as specified?
See the "Motor Control Table"
Go to Step 6
Go to Step 7
6
  1. Check the wiring harness and connectors between the controller and the motor that is not performing properly.
  2. Repair or replace the wiring harness or the defective terminal.
Is the repair complete?
-
System OK
-
7
Check the connector at the controller.
Is there a defective terminal?
-
Go to Step 8
Go to Step 9
8
Repair or replace the terminal.
Is the repair complete?
-
System OK
-
9
Replace the controller.
Is the repair complete?
-
System OK
-

Motor Control Table

Mode Setting
Mode Motor
.
Connector Terminal
Controller/Motor
Controller/Motor
Controller/Motor
Controller/Motor
Controller/Motor
B16/3
B17/2
B18/1
B19/7
B20/6
Vent
11-14 v
11-14 v
11-14 v
11-14 v
0 v
Bi-Level
11-14 v
11-14 v
11-14 v
0 v
11-14 v
Foot
11-14 v
11-14 v
0 v
11-14 v
11-14 v
Foot/Defrost
11-14 v
0 v
11-14 v
11-14 v
11-14 v
Defrost
0 v
11-14 v
11-14 v
11-14 v
11-14 v

Air Source Selection Not Controlled

Refer to "A/C Blower and Motor Controls Diagram" for the electrical schematic diagram of the circuits described in this procedure.

Air Source Selection Not Controlled

Step Action Value(s) Yes No
1
Measure the voltage at terminal 4 of the intake motor.
Is the voltage within the value specified?
11-14 v
Go to Step 3
Go to Step 2
2
  1. Check the connector and circuit (Brown) for any wiring or terminal problems.
  2. Repair any problems found.
Is the repair complete?
-
System OK
-
3
  1. Using the Intake Motor Table, measure the voltages between terminal 4 and terminal 5 of the motor connector.
  2. Change the intake setting and observe the voltage changes.
Are these voltages within the specified value?
See the "Intake Motor Table"
Go to Step 4
Go to Step 5
4
Replace the intake motor.
Is the repair complete?
-
System OK
-
5
  1. Using the Intake Motor Table, measure the voltages between terminal 4 and terminal 7 of the motor connector.
  2. Change the intake setting and observe the voltage changes.
Are these voltages within the specified value?
See the "Intake Motor Table"
Go to Step 6
Go to Step 7
6
  1. Check the wiring harness and connectors between the controller and the motor that is not performing properly.
  2. Repair or replace the wiring harness or the defective terminal.
Is the repair complete?
-
System OK
-
7
Check the connector at the controller.
Is there a defective terminal?
-
Go to Step 8
Go to Step 9
8
Repair or replace the terminal.
Is the repair complete?
-
System OK
-
9
Replace the controller.
Is the repair complete?
-
System OK
-

Intake Control Table

Intake Setting
Intake Motor
.
Connector Terminal
Controller/Motor
Controller/Motor
B14/7
B13/5
Recirculate
11-14 v
0 v
Fresh
0 v
11-14 v

J5B17D05
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Compressor Magnetic Clutch Does Not Engage

Step Action Value(s) Yes No
1
  1. Remove the ATC Controller from the instrument panel, keeping the wiring harness connected.
  2. Turn the ignition switch to ON.
  3. Turn the A/C switch to ON.
  4. Check the voltage between ground and terminal A11 on the controller.
Is the voltage within the specified value?
11-14 v
Go to Step 2
2
Replace the ATC controller.
Is the repair complete?
-
System OK
-

DIAGNOSTIC TROUBLE CODES


J5B17D06
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Code 1 - In-Car Sensor Error

This code will set if the output of the in-car sensor indicates a probable short circuit or an open in the sensor or the associated wiring harness, or a malfunction of the ATC controller.

Code 1 - In-Car Sensor Error

Step Action Value(s) Yes No
1
  1. Disconnect the in-car sensor connector from the ATC controller.
  2. Examine the wiring from the sensor to the connector and the connector for any signs of damage.
  3. Measure the resistance between the in-car sensor connector terminals.
Is there any sign of damage in the wiring or connector, or is the resistance outside the specified value at 20 to 25°C (68 to 77°F)?
2600-2100 Ω
Go to Step 2
Go to Step 3
2
Repair the damaged wiring or the connector, or replace the in-car sensor as required.
Is the repair complete?
-
System OK
-
3
  1. Turn the ignition to ON.
  2. Measure the voltage between the two connector terminals on the controller housing.
Is the voltage equal to the value specified?
> 4 v
Go to Step 7
Go to Step 4
4
Check the terminals on the in-car sensor connector.
Is any problem found with the connector?
-
Go to Step 5
Go to Step 6
5
Repair the connector terminals or replace the in-car sensor or ATC controller as required.
Is the repair complete?
-
System OK
-
6
  1. Reconnect the in-car sensor to the controller.
  2. Turn the ignition switch to ON.
  3. Observe the temperature display area.
Does this display indicate the continuing presence of a code 1 condition?
-
Go to Step 7
System OK
7
Replace the ATC controller.
Is the repair complete?
-
System OK
-

J5B17D07
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Code 2 - Ambient Air Temperature Sensor Error

This code will set if the output of the ambient air temperature sensor indicates a probable short circuit or an open in the sensor or the associated wiring harness, or a malfunction of the ATC controller.

Code 2 - Ambient Air Temperature Sensor Error

Step Action Value(s) Yes No
1
  1. Disconnect the ambient air sensor connector from the front bumper harness.
  2. Measure the resistance between the ambient air sensor connector terminals.
Is the resistance equal to the specified value at 20 to 25°C (68 to 77°F)?
2600-2100 Ω
Go to Step 5
Go to Step 2
2
  1. Remove the ambient air sensor from behind the front bumper.
  2. Examine the wiring for any open or short and examine the connector for any damage.
Is there a problem with the wiring or the connector?
-
Go to Step 3
Go to Step 4
3
Repair the problem found in the ambient air sensor wiring or the connector.
Is the repair complete?
-
System OK
-
4
Replace the ambient air sensor.
Is the repair complete?
-
System OK
-
5
  1. Turn the ignition to ON.
  2. Measure the voltage between the two terminals in the ambient air sensor connector on the front bumper harness.
Is the voltage equal to the value specified?
> 4 v
Go to Step 7
Go to Step 6
6
  1. Reconnect the in-car sensor to the controller.
  2. Turn the ignition switch to ON.
  3. Observe the temperature display area.
Does this display indicate the continuing presence of a code 2 condition?
-
Go to Step 8
System OK
7
  1. Pull the ATC controller from the instrument panel, leaving the wiring harness connected.
  2. Measure the voltage between terminals A13 and B8 by backprobing the connectors.
Is the voltage equal to the value specified?
< 4 v
Go to Step 8
Go to Step 9
8
Replace the ATC Controller.
Is the repair complete?
-
System OK
-
9
  1. Trace the wiring for the ambient air sensor from the ATC controller, through connectors C209, C208, C202 and C113 to the ambient air sensor connector on the front bumper harness.
  2. Repair any open or high resistance condition in the wiring or a connector terminal.
Is the repair complete?
-
System OK
-

J3B17D09
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Code 3 - Water Sensor Error

This code will set if the output of the coolant sensor indicates a probable short circuit or an open in the sensor or the associated wiring harness, or a malfunction of the ATC controller.

Code 3 - Water Sensor Error

Step Action Value(s) Yes No
1
  1. Disconnect the coolant temperature sensor connector from the ATC harness.
  2. Examine the wiring from the sensor to the connector and examine the connector for any signs of damage.
  3. Measure the resistance between the coolant temperature sensor connector terminals.
Is there any sign of damage in the wiring or the connector, or is the resistance outside the specified value at 20 to 25°C (68 to 77°F)?
2600-2100 Ω
Go to Step 2
Go to Step 3
2
Repair the damaged wiring or the connector, or replace the coolant temperature sensor as required.
Is the repair complete?
-
System OK
-
3
  1. Turn the ignition to ON.
  2. Measure the voltage between the two coolant temperature sensor connector terminals on the ATC harness.
Is the voltage equal to the specified value?
< 4 v
Go to Step 7
Go to Step 4
4
Check the terminals on the coolant temperature sensor connector.
Is any problem found with the connector?
-
Go to Step 5
Go to Step 6
5
Repair the connector terminals or replace the coolant temperature sensor or ATC controller as required.
Is the repair complete?
-
System OK
-
6
  1. Reconnect the coolant temperature sensor to the ATC harness.
  2. Turn the ignition switch to ON.
  3. Observe the temperature display area.
Does this display indicate the continuing presence of a code 3 condition?
-
Go to Step 9
System OK
7
  1. Pull the ATC controller from the instrument panel, leaving the wiring harness connected.
  2. Measure the voltage between terminals A13 and B9 by backprobing the connectors.
Is the voltage equal to the value specified?
< 4 v
Go to Step 9
Go to Step 8
8
  1. Trace the wiring from controller terminals A13 and B9 to the coolant temperature sensor connector terminals on the ATC harness connectors.
  2. Repair any open or high resistance found in the wiring or connector terminals.
Is the repair complete?
-
System OK
-
9
Replace the ATC controller.
Is the repair complete?
-
System OK
-

J4D17D05
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Code 4 - Air Mix Door Error

This code will set if the output of the mix door indicator indicates that the door opening angle is out of range or does not change value when the door should be moving. This would indicate a short circuit or an open in the sensor or the associated wiring harness, a door motor that is not operating, or a malfunction of the ATC controller.

Code 4 - Air Mix Door Error

Step Action Value(s) Yes No
1
  1. Disconnect the I/P wiring harness connector from the air mix door (AMD) motor.
  2. Use an ohmmeter to measure the resistance between terminals 5 and 7 on the AMD motor.
Does the measured resistance indicate an open or a shorted condition?
Open = ∞, Short = ≈ 0 Ω
Go to Step 4
Go to Step 2
2
Measure the resistance between terminals 2 and 3 on the AMD motor.
Is the resistance equal to the value specified?
≈ 3000 Ω
Go to Step 3
Go to Step 4
3
Measure the resistance between terminals 6 and 2 and between terminals 6 and 3 on the AMD motor.
Do these resistances add to approximately the value measured between terminals 2 and 3?
≈ 3000 Ω
Go to Step 5
Go to Step 4
4
Replace the AMD motor.
Is the repair complete?
-
System OK
-
5
Check the connector terminals at the AMD motor and the wiring in the ATC harness.
Is there a problem with any terminal on either the harness connector or the motor connector or the wiring?
-
Go to Step 6
Go to Step 7
6
Repair the problem found with a connector terminal or the wiring, or replace the motor as required.
Is the repair complete?
-
System OK
-
7
  1. Remove the ATC controller from the instrument panel.
  2. Disconnect the harness connectors from the ATC controller.
  3. Examine the connector terminals on the harness connectors and the controller connectors and the harness wiring.
Is there a problem with any of these connectors or the wiring?
-
Go to Step 8
Go to Step 9
8
Repair the problem found with a connector terminal or wiring.
Is the repair complete?
-
System OK
-
9
Check continuity in the harness between the controller connectors and the AMD motor connector.
  • Controller terminal A2 to motor terminal 7.
  • Controller terminal A8 to motor terminal 5.
  • Controller terminal B6 to motor terminal 2.
  • Controller terminal B5 to motor terminal 6.
  • Controller terminal B4 to motor terminal 3.
Does the continuity equal the specified value?
≈ 0 Ω
Go to Step 10
Go to Step 11
10
Repair the continuity problem.
Is the repair complete?
-
System OK
-
11
  1. Reconnect the AMD motor to the ATC harness.
  2. Reconnect the ATC harness connectors to the controller.
  3. Turn the ignition to ON.
  4. Use backprobing for voltage measurements.
  5. Measure the voltage between ground and terminal B5 at the controller.
Is the voltage equal to the specified value?
< 4 v
Go to Step 12
Go to Step 14
12
  1. Set the temperature controller to 18°C (64°F).
  2. Connect a voltmeter between ground and terminal A8 at the controller. It should display about 12 v.
  3. Raise the temperature setting on the controller to 32°C (90°F).
Does the voltage equal the specified value?
Drops from 12 v to 0 v
Go to Step 13
Go to Step 15
13
  1. Connect a voltmeter between ground and terminal A2 at the controller. It should display about 12 v.
  2. Change the temperature setting to 18°C (64°F).
Does the voltage equal the specified value?
Drops from 12 v to 0 v
Go to Step 20
Go to Step 15
14
  1. Recheck the wiring harness and the connector terminals associated with controller terminals B4, B5, and B6, and AMD motor terminals 2, 6, and 3.
  2. Repair any problem found.
Is the repair complete?
-
System OK
-
15
Recheck all wiring circuits between the controller and the AMD motor.
Is there a problem in the wiring or the connectors?
-
Go to Step 16
Go to Step 17
16
Repair the problem in the wiring between the ATC controller and the AMD motor.
Is the repair complete?
-
System OK
-
17
Recheck the AMD motor.
Is there a problem in the AMD motor?
-
Go to Step 18
Go to Step 19
18
Replace the AMD motor.
Is the repair complete?
-
System OK
-
19
Replace the controller.
Is the repair complete?
-
System OK
-
20
Observe the operation of the air mix door when the temperature setting is changed.
Does the door move normally?
-
Go to Step 22
Go to Step 21
21
Repair or replace the air mix door.
Is the repair complete?
-
System OK
-
22
Observe the operation of the AMD motor when the temperature setting is changed.
Does the motor operate normally?
-
Go to Step 24
Go to Step 23
23
Replace the AMD motor.
Is the repair complete?
-
System OK
-
24
Reconnect everything and test the system.
Does code 4 reset?
-
Go to Step 25
System OK
25
Replace the controller.
Is the repair complete?
-
System OK
-

J5B17D08
Display graphicTranslations of text in graphics


Code 5 - Sun Sensor Error

This code will set if the output of the sun sensor indicates a probable short circuit or an open in the sensor or the associated wiring harness, or a malfunction of the ATC controller.

Code 5 - Sun Sensor Error

Step Action Value(s) Yes No
1
  1. Lift the sun sensor from the top of the dashboard.
  2. Secure the ATC harness below the sun sensor connector so it cannot fall through the opening in the top of the dashboard.
  3. Disconnect the sun sensor connector from the ATC harness.
  4. Examine the wiring from the sensor to the connector, and examine the connector for any signs of damage.
  5. Measure the resistance between the sun sensor connector terminals.
Is there any sign of damage in the wiring or connector or does the resistance equal the value specified?
≈ 0 Ω
Go to Step 2
Go to Step 3
2
Repair the damaged wiring or the connector, or replace the sun sensor as required.
Is the repair complete?
-
System OK
-
3
  1. Turn the ignition to ON.
  2. Measure the voltage between the two sun sensor connector terminals on the ATC harness.
Is the voltage equal to the specified value?
< 4 v
Go to Step 7
Go to Step 4
4
Check the terminals on the sun sensor connector.
Is any problem found with the connector?
-
Go to Step 5
Go to Step 6
5
Repair the connector terminals or replace the sun sensor or ATC controller as required.
Is the repair complete?
-
System OK
-
6
  1. Reconnect the sun sensor to the ATC harness.
  2. Turn the ignition switch to ON.
  3. Observe the temperature display area.
Does this display indicate the continuing presence of a code 5 condition?
-
Go to Step 9
System OK
7
  1. Pull the ATC controller from the instrument panel, leaving the wiring harness connected.
  2. Measure the voltage between terminals A13 and B10 by backprobing the connectors.
Is the voltage equal to the value specified?
< 4 v
Go to Step 9
Go to Step 8
8
  1. Trace the wiring from controller terminals A13 and B10 to the sun sensor connector terminals on the ATC harness connectors.
  2. Repair any open or high resistance found in the wiring or connector terminals.
Is the repair complete?
-
System OK
-
9
Replace the ATC controller.
Is the repair complete?
-
System OK
-

J5B17D04
Display graphicTranslations of text in graphics


Code 6 - Power Transistor Error

Step Action Value(s) Yes No
1
  1. Disconnect the ATC controller connectors A and B.
  2. Disconnect the connectors from the power transistor.
  3. Measure the resistance circuit GRY/BLK from terminal 4 of the power transistor to terminal B1 of the ATC controller.
Does the resistance equal the specified value?
≈ 0 Ω
Go to Step 2
Go to Step 6
2
Measure the resistance in the circuit from terminal 1 of the power transistor to terminal B12 of the ATC controller.
Does the resistance equal the specified value?
≈ 0 Ω
Go to Step 3
Go to Step 6
3
  1. Reconnect the wiring harness to the ATC controller and to the power transistor.
  2. Turn the ignition switch to ON.
  3. Measure the voltage from ground to terminal B12 of the ATC controller.
  4. Cycle the fan speed controller manually from the lowest (speed 1) to the highest speed (8).
Do the voltages measured match approximately the specified values within ±0.5 v?
1: 4.0 v 2: 5.0 v 3: 6.0 v 4: 7.0 v 5: 8.0 v 6: 9.0 v 7: 10.0 v 8: Max Hi:
Go to Step 4
Go to Step 5
4
Replace the ATC controller.
Is the repair complete?
-
System OK
-
5
Measure the resistance in circuit (Violet) between terminal 6 of the power transistor and the blower motor terminal 2.
Does the resistance equal the specified value?
≈ 0 Ω
Go to Step 7
Go to Step 6
6
Repair or replace the wiring harness for the circuit (Violet).
Is the repair complete?
-
System OK
-
7
Check the wiring harness of the motor and power supply.
  • Check the blower relay.
  • Check fuse EF3.
Is there any problem in the wiring, the relay, or the fuse?
-
Go to Step 9
Go to Step 8
8
Replace the power transistor.
Is the repair complete?
-
System OK
-
9
Repair or replace the wiring harness, the relay, or the fuse as required.
Is the repair complete?
-
System OK
-

J5B17D04
Display graphicTranslations of text in graphics


Code 7 - Max-Hi Relay Error

Step Action Value(s) Yes No
1
  1. Turn the ignition switch ON.
  2. Set the blower speed manually for maximum speed.
  3. Measure voltage between the ATC controller terminal A10 and ground.
Is the voltage approximately equal to the specified value?
≈ 0 Ω
Go to Step 3
Go to Step 2
2
Replace the ATC controller.
Is the repair complete?
-
System OK
-
3
  1. Check the wiring harness associated with the MAX-HI relay for defects or high terminal resistance.
  2. Repair any defects found.
Is the repair complete?
-
System OK
Go to Step 4
4
Replace the MAX-HI relay.
Is the repair complete?
-
System OK
-


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