A/C Switch Assembly Signal Circuit

A/C SWITCH ASSEMBLY SIGNAL CIRCUIT


Diagnosis Procedure

Regarding Wiring Diagram information, With Monochrome Display.
1.CHECK WITH SELF-DIAGNOSIS FUNCTION OF CONSULT-III
1. Using CONSULT-III, perform "SELF-DIAGNOSIS RESULTS" of HVAC.
2. Check if any DTC No. 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. With Monochrome Display or With Monochrome Display.
Is any DTC No. displayed?
YES - Perform diagnosis for the applicable DTC. Testing and Inspection.
NO - GO TO 2.
2.CHECK TX (A/C SWITCH ASSEMBLY to A/C AUTO AMP.) CIRCUIT CONTINUITY





1. Turn ignition switch OFF.
2. Disconnect the A/C switch assembly and the A/C auto amp. connectors.
3. Check continuity between A/C switch assembly harness connector M104 (A) terminal 4 and A/C auto amp. harness connector M37 (B) terminal 7.

4 - 7 : Continuity should exist.

4. Check continuity between A/C switch assembly harness connector M104 (A) terminal 4 and ground.

4 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - GO TO 3.
NO - Repair harness or connector.
3.CHECK RX (A/C AUTO AMP. to A/C SWITCH ASSEMBLY) CIRCUIT CONTINUITY





1. Check continuity between A/C switch assembly harness connector M104 (A) terminal 3 and A/C auto amp. harness connector M37 (B) terminal 6.

3 - 6 : Continuity should exist.

2. Check continuity between A/C switch assembly harness connector M104 (A) terminal 3 and ground.

3 - Ground : Continuity should not exist.

Is the inspection result normal?
YES - Perform trouble diagnosis for the A/C switch assembly. Diagnosis Procedure.
NO - Repair harness or connector.