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Nissan Sentra B18 (2020-2025) Service Manual: Cooling Fan Motor

Component Function Check

Component Function Check

  1. CHECK COOLING FAN FUNCTION

    With CONSULT

    1. Turn ignition switch ON.

    2. Perform “FAN DUTY CONTROL” in “ACTIVE TEST” mode with CONSULT.

    3. Change duty ratio using CONSULT.

    4. Check that cooling fan operates.

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Refer to Diagnosis Procedure.

Diagnosis Procedure

Diagnosis Procedure

  1. CHECK COOLING FAN MODULE POWER SUPPLY-1

    1. Turn ignition switch OFF.

    2. Disconnect cooling fan module harness connector.

    3. Turn ignition switch ON.

    4. Check the voltage between cooling fan module harness connector and ground.

      Cooling fan module

      Ground

      Voltage

      Connector

      Terminal

      F67

      2

      Ground

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 2.

    NO >>

    GO TO 7.

  2. CHECK COOLING FAN MODULE POWER SUPPLY-2

    1. Check the voltage between cooling fan module harness connector and ground.

      Cooling fan module

      Ground

      Voltage

      Connector

      Terminal

      F63

      6

      Ground

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 3.

    NO >>

    GO TO 8.

  3. CHECK COOLING FAN MODULE GROUND CIRCUIT

    1. Turn ignition switch OFF.

    2. Check the continuity between cooling fan module harness connector and ground.

      Cooling fan module

      Ground

      Continuity

      Connector

      Terminal

      F67

      1

      Ground

      Existed

    3. Also check harness for short to power.

    Is the inspection result normal?

    YES >>

    GO TO 4.

    NO >>

    Repair or replace error-detected parts.

  4. CHECK COOLING FAN CONTROL SIGNAL CIRCUIT

    1. Disconnect IPDM E/R harness connector.

    2. Check the continuity between IPDM E/R harness connector and cooling fan module harness connector.

      IPDM E/R

      Cooling fan module

      Continuity

      Connector

      Terminal

      Connector

      Terminal

      F98

      106

      F67

      4

      Existed

      107

      3

    3. Also check harness for short to ground and short to power.

    Is the inspection result normal?

    YES >>

    GO TO 5.

    NO >>

    Repair or replace error-detected parts.

  5. CHECK COOLING FAN MODULE OUTPUT SIGNAL CIRCUIT

    1. Reconnect all harness connectors disconnected.

    2. Disconnect cooling fan module harness connectors.

    3. Turn ignition switch ON.

    4. Check the voltage between cooling fan module harness connector and ground.

      Cooling fan module

      Ground

      Voltage

      Connector

      Terminal

      F63

      5

      Ground

      Battery voltage

    Is the inspection result normal?

    YES >>

    GO TO 6.

    NO >>

    Replace cooling fan module.

  6. CHECK COOLING FAN MOTOR

    Refer to Component Inspection.

    Is the inspection result normal?

    YES >>

    GO TO 9.

    NO >>

    Replace cooling fan motor. Refer to Exploded View.

  7. CHECK FUSE

    1. Disconnect 10 A fuse (No. 73) from fuse and fusible link holder.

    2. Check 10 A fuse for blown.

    Is the fuse blown (open)?

    YES >>

    Replace the fuse. [Check the power supply if fuse is blown (open) again.]

    NO >>

    Perform the trouble diagnosis for power supply circuit.

  8. CHECK FUSE

    1. Disconnect 50 A fuse (No. N) from fuse and fusible link holder.

    2. Check 50 A fuse for blown.

    Is the fuse blown (open)?

    YES >>

    Replace the fuse. [Check the power supply if fuse is blown (open) again.]

    NO >>

    Perform the trouble diagnosis for power supply circuit.

  9. CHECK INTERMITTENT INCIDENT

    Perform Intermittent Incident.

    Is the inspection result normal?

    YES >>

    Replace IPDM E/R. Refer to Removal and Installation.

    NO >>

    Repair or replace error-detected parts.

Component Inspection

Component Inspection

  1. CHECK COOLING FAN MOTOR

    1. Turn ignition switch OFF.

    2. Disconnect cooling fan motor harness connector.

    3. Supply cooling fan motor terminals with battery voltage and check operation.

      Cooling fan motor

      Condition

      Terminal

      +

      –

      1

      2

      Cooling fan motor operated

    Is the inspection result normal?

    YES >>

    INSPECTION END

    NO >>

    Replace cooling fan motor. Refer to Removal and Installation.

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