COMPARTMENT TEMPERATURE DOES NOT CHANGE, OR A/C SYSTEM DOES NOT RESPOND PROMPTLY.
| COMPARTMENT TEMPERATURE DOES NOT CHANGE, OR A/C SYSTEM DOES NOT RESPOND PROMPTLY. |
TROUBLE SYMPTOM:
| • |
Compartment temperature is not changed. (No
cool air is discharged.)
|
|
| • |
A/C system does not respond
quickly.
|
|
WIRING DIAGRAM:
CHECK FUSE.
Turn the ignition switch to OFF.Remove the No. 2 fuse in main fuse box.
Check the condition of fuse.
Is the fuse blown-out?
| Yes |
Replace the fuse.
| No |
CHECK POWER SUPPLY TO MAGNET CLUTCH OF A/C COMPRESSOR.
Start the engine, and turn A/C switch to ON.Set the temperature control dial to maximum cold position.
Measure the voltage between magnet clutch connector and chassis ground.
Connector & terminal
(F24) No. 1 (+) — Chassis ground (−):
Is the voltage more than 10 V?
| Yes |
| No |
Repair the open circuit in harness for power supply line of the A/C compressor.
CHECK SIGNAL VOLTAGE TO A/C RELAY.
Turn the ignition switch to ON.Turn the A/C switch to ON.
Measure the signal voltage between A/C relay and chassis ground.
Connector & terminal
(F27) No. 14 (+) — Chassis ground (−):
Is the voltage more than 10 V?
| Yes |
| No |
Repair the open circuit in harness for A/C relay signal circuit.
CHECK A/C RELAY.
Remove the A/C relay in main fuse box.Check the A/C relay.
Is the operation of the relay OK?
| Yes |
| No |
Replace the A/C relay.
CHECK OPERATION OF MAIN FAN MOTOR.
Start the engine.Turn the A/C switch to ON.
Check the operation of main fan motor.
Does the radiator main fan operate?
| Yes |
| No |
CHECK POWER SUPPLY TO MAIN FAN MOTOR.
| Important | ||
|
Be careful not to overheat the engine during repair. |
||
Turn the ignition switch to OFF.
Disconnect the connector from main fan motor.
Start the engine, and warm it up until engine coolant temperature increases over 95°C (203°F).
Stop the engine and turn ignition switch to ON.
Measure the voltage between main fan motor connector and chassis ground.
Connector & terminal
(F17) No. 1, 2 (+) — Chassis ground (−):
Is the voltage more than 10 V?
| Yes |
| No |
Repair the open circuit in harness for power supply circuit.
CHECK GROUND CIRCUIT OF MAIN FAN MOTOR.
Turn the ignition switch to OFF.Measure the resistance between main fan motor connector and chassis ground.
Connector & terminal
(F17) No. 3, 4 — Chassis ground:
Is the resistance less than 1 Ω?
| Yes |
| No |
Repair the open circuit in harness between main fan motor connector and chassis ground.
CHECK POOR CONTACT.
Check poor contact in main fan motor connector.Is there poor contact in main fan motor connector?
| Yes |
Repair the poor contact in main fan motor connector.
| No |
CHECK MAIN FAN MOTOR.
Connect the battery positive (+) terminal to terminal No. 1 and 2, and negative (−) terminal to terminal No. 3 and 4.Does the main fan rotate?
| Yes |
Repair the poor contact in main fan motor connector.
| No |
Replace the main fan motor with a new one.
CHECK OPERATION OF SUB FAN MOTOR.
Check the operation of sub fan motor.Does the radiator sub fan operate?
| Yes |
| No |
CHECK POWER SUPPLY TO SUB FAN MOTOR.
| Important | ||
|
Be careful not to overheat the engine during repair. |
||
Turn the ignition switch to OFF.
Disconnect the connector from sub fan motor.
Start the engine, and warm it up until engine coolant temperature increases over 100°C (212°F).
Stop the engine and turn the ignition switch to ON.
Measure the voltage between sub fan motor connector and chassis ground.
Connector & terminal
(F16) No. 1, 2 (+) — Chassis ground (−):
Is the voltage more than 10 V?
| Yes |
| No |
Repair the open circuit in harness for power supply circuit.
CHECK GROUND CIRCUIT OF SUB FAN MOTOR.
Turn the ignition switch to OFF.Measure the resistance between sub fan motor connector and chassis ground.
Connector & terminal
(F16) No. 3, 4 — Chassis ground:
Is the resistance less than 1 Ω?
| Yes |
| No |
Repair the open circuit in harness between sub fan motor connector and chassis ground.
CHECK POOR CONTACT.
Check poor contact in sub fan motor connector.Is there poor contact in sub fan motor connector?
| Yes |
Repair the poor contact in sub fan motor connector.
| No |
CHECK SUB FAN MOTOR.
Connect the battery positive (+) terminal to terminal No. 1 and 2, and negative (−) terminal to terminal No. 3 and 4.Does the sub fan rotate?
| Yes |
Repair the poor contact in sub fan motor connector.
| No |
Replace the sub fan motor with a new one.
CHECK EACH SENSOR AND POTENTIOMETER.
Check the sensors and potentiometer for proper operation using the self-diagnostic function.
Is the operation of each sensor and potentiometer normal?
| Yes |
| No |
Check the sensor and circuit.
CHECK CONNECTION OF ASPIRATOR DUCT.
Make sure the connection of aspirator duct is correct.Is the connection of aspirator duct correct?
| Yes |
Repair the aspirator duct connection.
| No |
CHECK EACH ACTUATOR.
Check the actuators for proper operation using the self-diagnostic function.
Is the operation of each actuator normal?
| Yes |
| No |
Check the actuator and circuit.
CHECK POOR CONTACT IN AUTO A/C CONTROL UNIT CONNECTOR.
Check poor contact in auto A/C control module connector.Is there poor contact in connector?
| Yes |
Repair the connector.
| No |
Replace the auto A/C control module.
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