Toyota
Nissan Versa
 Sedan Service Manual
Engine » Engine control system (EC) » Cooling fan
Diagnosis Procedure

FOR SINGLE CONNECTOR COOLING FAN WITHOUT A/C MODELS

1.CHECK COOLING FAN MOTOR CIRCUIT

  1. Disconnect cooling fan motor harness connector.
  2. Check the continuity between IPDM E/R harness connector and cooling fan motor harness connector.
  3. Check the continuity between cooling fan motor harness connector and ground. 
  4. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 2.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

2.CHECK COOLING FAN MOTOR

Refer to EC, "Component Inspection (Cooling Fan Motor)".

Is the inspection result normal?

YES >> GO TO 3.

NO >> Replace cooling fan motor. Refer to CO, "Removal and Installation".

3.CHECK INTERMITTENT INCIDENT

Perform GI, "Intermittent Incident".

Is the inspection result normal?

YES >> Replace IPDM E/R. Refer to PCS, "Removal and Installation" (WITH I-KEY) or PCS, "Removal and Installation" (WITHOUT I-KEY).

NO >> Repair or replace harness or connector.

EXCEPT FOR SINGLE CONNECTOR COOLING FAN WITHOUT A/C MODELS

1.CHECK COOLING FAN MOTOR CIRCUIT

  1. Disconnect cooling fan motor harness connector.
  2. Check the continuity between IPDM E/R harness connector and cooling fan motor harness connector.
  3. Check the continuity between cooling fan relay harness connector and cooling fan motor harness connector.
  4. Check the continuity between cooling fan motor harness connector and ground. 
  5. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 2.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

2.CHECK COOLING FAN RELAY CIRCUIT

  1. Disconnect cooling fan relay harness connector.
  2. Disconnect IPDM E/R harness connector.
  3. Check the continuity between IPDM E/R harness connector and cooling fan relay harness connector.
  4. Check the continuity between cooling fan relay harness connector and ground. 
  5. Also check harness for short to ground and short to power.

Is the inspection result normal?

YES >> GO TO 3.

NO >> Repair open circuit or short to ground or short to power in harness or connectors.

3.CHECK COOLING FAN RELAY

Refer to EC, "Component Inspection (Cooling Fan Relay)".

YES or NO

YES >> GO TO 4.

NO >> Replace cooling fan relay.

4.CHECK COOLING FAN MOTOR

Refer to EC, "Component Inspection (Cooling Fan Motor)".

YES or NO

YES >> GO TO 5.

NO >> Replace cooling fan motor. Refer to CO, "Removal and Installation".

5.CHECK INTERMITTENT INCIDENT

Perform GI, "Intermittent Incident".

YES or NO

YES >> Replace IPDM E/R. Refer to PCS, "Removal and Installation" (WITH I-KEY) or PCS, "Removal and Installation" (WITHOUT I-KEY).

NO >> Repair or replace harness or connector.

    More about «Cooling fan»:

    Component Function Check

    Diagnosis Procedure

    Component Inspection (Cooling Fan Motor)

    Nissan Versa Sedan Service Manual / Engine / Engine control system (EC) / Cooling fan / Diagnosis Procedure

    Nissan Versa Sedan Service Manual

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