Nissan Maxima Service and Repair Manual: B2615 front blower motor relay circuit

Description

BCM controls the various electrical components and simultaneously supplies power according to the power supply position.

BCM checks the power supply position internally.

DTC Logic

DTC DETECTION LOGIC

Nissan Maxima. DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1. PERFORM DTC CONFIRMATION PROCEDURE

  1. Turn ignition switch ON under the following conditions, and wait for at least 1 second.
  • CVT selector lever is in the P or N position.
  • Release brake pedal.
  1. Check "Self diagnostic result" with CONSULT.

Diagnosis Procedure

1.CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY

Nissan Maxima. HECK FRONT BLOWER MOTOR RELAY POWER SUPPLY

  1. Turn ignition switch OFF.
  2. Disconnect front blower motor relay.
  3. Check voltage between front blower motor relay harness connector and ground under the following conditions.

Nissan Maxima. HECK FRONT BLOWER MOTOR RELAY POWER SUPPLY

2. CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY CIRCUIT

  1. Turn ignition switch OFF.
  2. Disconnect BCM harness connector.
  3. Check continuity between front blower motor relay harness connector and BCM harness connector.

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY CIRCUIT

  1. Check continuity between front blower motor relay harness connector and ground.

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY CIRCUIT

3. CHECK FRONT BLOWER MOTOR RELAY GROUND CIRCUIT

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY GROUND CIRCUIT

  1. Turn ignition switch OFF.
  2. Check continuity between front blower motor relay harness connector and ground.

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY GROUND CIRCUIT

4.CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY CIRCUIT-2

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY CIRCUIT-2

Check voltage between front blower motor relay harness connector and ground.

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY POWER SUPPLY CIRCUIT-2

5. CHECK FRONT BLOWER MOTOR RELAY

6. CHECK INTERMITTENT INCIDENT

Component Inspection (Front Blower Motor Relay)

1.CHECK FRONT BLOWER MOTOR RELAY

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY

  1. Turn ignition switch OFF.
  2. Remove front blower motor relay.
  3. Check the continuity between front blower motor relay terminals under the following conditions.

Nissan Maxima. CHECK FRONT BLOWER MOTOR RELAY

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