Nissan Maxima Service and Repair Manual: B261A push-button ignition switch

Description

IPDM E/R transmits the push-button ignition switch status via CAN communication to BCM. BCM receives push-button ignition switch status by hardwire input. BCM compares the 2 signals for mismatch.

DTC Logic

DTC DETECTION LOGIC

NOTE:

  • If DTC B261A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to PCS-44, "DTC Logic".
  • If DTC B261A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to PCS-45, "DTC Logic".

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

  1. Press the push-button ignition switch under the following conditions and wait for at least 1 second.
  • CVT selector lever is in the P position
  • Do not depress brake pedal.
  1. Check "Self diagnostic result" with CONSULT.

Diagnosis Procedure

1. CHECK PUSH-BUTTON IGNITION SWITCH OPERATION

Press push-button ignition switch and check if it turns to ON.

2. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

Nissan Maxima. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

  1. Turn ignition switch OFF.
  2. Disconnect push-button ignition switch.
  3. Check voltage between IPDM E/R harness connector and ground.

Nissan Maxima. CHECK IGNITION SWITCH OUTPUT SIGNAL (IPDM E/R)

3. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

Nissan Maxima. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

Nissan Maxima. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

  1. Disconnect IPDM E/R and BCM.
  2. Check continuity between IPDM E/R harness connector (A) and push-button ignition switch harness connector (B).
  3. Check continuity between IPDM E/R harness connector and ground.

Nissan Maxima. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

Nissan Maxima. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (IPDM E/R)

4. CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

  1. Disconnect push-button ignition switch.
  2. Check voltage between BCM harness connector and ground.

Nissan Maxima. CHECK IGNITION SWITCH OUTPUT SIGNAL (BCM)

5. CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

  1. Disconnect BCM and IPDM E/R.
  2. Check continuity between BCM harness connector and push-button ignition switch harness connector.
  3. Check continuity between BCM harness connector and ground.

Nissan Maxima.  CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

Nissan Maxima.  CHECK PUSH-BUTTON IGNITION SWITCH CIRCUIT (BCM)

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