Nissan Maxima Service and Repair Manual: A/C switch assembly signal circuit

Diagnosis Procedure

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.

2.CHECK RX (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.

Nissan Maxima. CHECK RX (A/C SWITCH ASSEMBLY → A/C AUTO AMP.) CIRCUIT CONTINUITY

4 - 7: Continuity should exist.

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

4 - Ground: Continuity should not exist.

3.CHECK TX (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.

Nissan Maxima. CHECK RX (A/C SWITCH ASSEMBLY → A/C AUTO AMP.) CIRCUIT CONTINUITY

3 - 6: Continuity should exist.

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

3 - Ground: Continuity should not exist.

    Magnet clutch

    Power supply and ground circuit