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

1.Using CONSULT, 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 --> 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. --> 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.