Nissan Maxima Service and Repair Manual: B260A ignition relay

Description

BCM turns ON the following relays to ignition power supply to each ECU when the ignition switch is turned ON.

• Ignition relay-1 (inside IPDM E/R)
• Ignition relay-2 (inside fuse block (J/B))
• Front blower motor relay

BCM checks any ignition relay ON request for consistency with the actual ignition relay operation status.

DTC Logic

DTC DETECTION LOGIC

NOTE:

• If DTC B260A is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to PCS-44, "DTC Logic".
• If DTC B260A is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to PCS-45, "DTC Logic".
• If DTC B260A is displayed with DTC B261A, first perform the trouble diagnosis for DTC B261A. Refer to PCS-60, "DTC Logic".

DTC CONFIRMATION PROCEDURE

1. PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON under the following conditions, and wait for at least 2 seconds.

• CVT selector lever is in the P or N position.
• Release the brake pedal.

2. Check "Self diagnostic result" with CONSULT.

Diagnosis Procedure

1.CHECK DATA MONITOR

1. Turn ignition switch ON.
2. Check IGN RLY1-REQ and IGN RLY status with CONSULT

2.CHECK CAN COMMUNICATION

Check CAN communication.

3.CHECK IGNITION RELAY-1 SIGNAL

1. Turn ignition switch OFF.
2. Check voltage between IPDM E/R harness connector and ground.

3. Turn ignition switch ON.
4. Check voltage between IPDM E/R harness connector and ground.