A/C Control Signal Circuit

A/C CONTROL SIGNAL CIRCUIT


Diagnosis Procedure

1.SELF-DIAGNOSIS RESULT CHECK
With CONSULT-III
1. Perform the "SELF-DIAGNOSIS RESULTS" of HVAC.
2. Check if any DTC is displayed in the self-diagnosis results.

NOTE:
If DTC is displayed along with DTC "U1000" or "U1010", first diagnose the DTC "U1000" or "U1010". Refer to Without 7 Inch Display or Without 7 Inch Display.
Is any DTC displayed?
YES - Perform the diagnosis that is applicable to the sensor and actuator. Refer to Without 7 Inch Display or Testing and Inspection.
NO - GO TO 2.
2.CHECK TX (A/C CONTROL to A/C AUTO AMP.) CIRCUIT CONTINUITY
1. Turn the ignition switch OFF.
2. Disconnect the A/C control and the A/C auto amp. connector.
3. Check continuity between A/C control harness connector and A/C auto amp. harness connector.





4. Check continuity between A/C control harness connector and ground.





Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK RX (A/C AUTO AMP. to A/C CONTROL) CIRCUIT CONTINUITY
1. Disconnect the A/C control and the A/C auto amp. connector.
2. Check continuity between A/C control harness connector and A/C auto amp. harness connector.





3. Check continuity between A/C control harness connector and ground.





Is the inspection result normal?
YES - Perform trouble diagnosis for the A/C control. Refer to Without 7 Inch Display.
NO - Repair harness or connector.