LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2015 >> QX60 Base, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 116 (Engine Control System (DTC/Circuit Diagnosis) (VQ35DE) (Except Hybrid) (3 Of 3)) >> DTC/Circuit Diagnosis >> Cooling Fan >> Diagnosis Procedure

Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti QX60. However, it is still accessible from the selected car via links, so may be relevant.

  1. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY

    1. Turn ignition switch OFF.
    2. Disconnect cooling fan control nodule harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between cooling fan control nodule harness connector and ground.
      + - Voltage
      Cooling fan control module
      Connector Terminal
      E225 3 Ground Battery voltage

    Is the inspection result normal?

    YES 

    GO TO STEP 5  .

    NO 

    GO TO STEP 2  .

  2. CHECK COOLING FAN CONTROL MODULE POWER SUPPLY CIRCUIT

    1. Turn ignition switch OFF.
    2. Disconnect cooling fan relay harness connector.
    3. Check the continuity between cooling fan control nodule harness connector and cooling fan relay harness connector.
      + - Continuity
      Cooling fan control module Cooling fan relay
      Connector Terminal Connector Terminal
      E225 3 E82 5 Existed
    4. Also check harness for short to ground.

    Is the inspection result normal?

    YES 

    GO TO STEP 3  .

    NO 

    Repair or replace error-detected parts.

  3. CHECK COOLING FAN RELAY POWER SUPPLY CIRCUIT

    1. Disconnect IPDM E/R harness connector.
    2. Check the continuity between cooling fan relay harness connector and IPDM E/R harness connector.
      + - Continuity
      Cooling fan relay IPDM E/R
      Connector Terminal Connector Terminal
      E82 2 E119 27 Existed
    3. Also check harness for short to ground.

    Is the inspection result normal?

    YES 

    GO TO STEP 4  .

    NO 

    Repair or replace error-detected parts.

  4. CHECK COOLING FAN RELAY

    Check cooling fan relay. Refer to COMPONENT INSPECTION (COOLING FAN RELAY) .

    Is the inspection result normal?

    YES 

    Perform the trouble diagnosis for power supply circuit.

    NO 

    Replace cooling fan relay.

  5. CHECK COOLING FAN CONTROL MODULE GROUND CIRCUIT

    1. Turn ignition switch OFF.
    2. Check the continuity between cooling fan control nodule harness connector and ground.
      + - Continuity
      Cooling fan control module
      Connector Terminal
      E225 1 Ground Existed
    3. Also check harness for short to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 6  .

    NO 

    Repair or replace error-detected parts.

  6. CHECK COOLING FAN CONTROL SIGNAL CIRCUIT

    1. Disconnect IPDM E/R harness connector.
    2. Check the continuity between cooling fan control nodule harness connector and IPDM E/R harness connector.
      + - Continuity
      Cooling fan control module IPDM E/R
      Connector Terminal Connector Terminal
      E225 2 E218 93 Existed
    3. Also check harness for short to ground and to power.

    Is the inspection result normal?

    YES 

    GO TO STEP 7  .

    NO 

    Repair or replace error-detected parts.

  7. CHECK COOLING FAN CONTROL MODULE OUTPUT SIGNAL CIRCUIT

    1. Reconnect all harness connectors disconnected.
    2. Disconnect cooling fan control module harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between cooling fan control module terminals and ground.
      + - Voltage
      Cooling fan control module
      Connector Terminal
      E245 4 Ground Battery voltage
      E246 6

    Is the inspection result normal?

    YES 

    GO TO STEP 8  .

    NO 

    Repair or replace error-detected parts.

  8. CHECK COOLING FAN MOTORS -1 AND -2

    Check the cooling fan motor. Refer to COMPONENT INSPECTION (COOLING FAN MOTOR) .

    YES 

    Check intermittent incident. Refer to INTERMITTENT INCIDENT .

    NO 

    Replace cooling motor. Refer to REMOVAL AND INSTALLATION .

scientia non olet · About LEMON Manuals