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Home >> Nissan-Datsun >> 2006 >> Sentra Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTCS P0850 To P2A00 (QG18DE) >> DTC P1217 Engine Over Temperature >> Diagnostic Procedure >> Procedure B

Procedure B

  1. CHECK COOLING FAN POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect cooling fan relay-2.
    3. Turn ignition switch ON.
    4. Check voltage between cooling fan relay-2 terminals 1, 3 and ground with CONSULT-II or tester.

      Voltage: Battery voltage 

    OK or NG 

    OK: GO TO  3.

    NG: GO TO  2.

    Fig 1: Checking Voltage Between Cooling Fan Relay-2 Terminals 1, 3 And Ground
    G04191328Courtesy of NISSAN MOTOR CO., U.S.A.
  2. DETECT MALFUNCTIONING PART 

    Check the following.

    • Fuse and fusible link box connectors E23, E25
    • Fuse block (J/B) connector E103
    • Harness for open or short between cooling fan relay-2 and fuse
    • Harness for open or short between cooling fan relay-2 and battery

    : Repair harness or connectors.

  3. CHECK COOLING FAN MOTOR CIRCUIT FOR OPEN AND SHORT 
    1. Turn ignition switch OFF.
    2. Disconnect cooling fan motor-1 harness connector.
    3. Check harness continuity between cooling fan relay-2 terminal 5 and cooling fan motor-1 terminal 2, cooling fan relay-2 terminal 6 and cooling fan motor-1 terminal 3, cooling fan relay-2 terminal 7 and ground.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

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

    OK or NG 

    OK: GO TO  4.

    NG: Repair open circuit or short to ground or short to power in harness or connectors.

    Fig 2: Disconnecting Cooling Fan Motor-1 Harness Connector
    G04191329Courtesy of NISSAN MOTOR CO., U.S.A.
  4. CHECK COOLING FAN RELAY-2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 
    1. Disconnect ECM harness connector.
    2. Check harness continuity between ECM terminal 89 and cooling fan relay-2 terminal 2.

      Refer to WIRING DIAGRAM .

      Continuity should exist  .

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

    OK or NG 

    OK: GO TO  6.

    NG: GO TO  5.

  5. DETECT MALFUNCTIONING PART 

    Check the following.

    • Harness connectors E9, F47
    • Harness for open or short between cooling fan relay-2 and ECM

    : Repair open circuit or short to ground or short to power in harness or connectors.

  6. CHECK COOLING FAN RELAY-2 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO  7.

    NG: Replace cooling fan relays.

  7. CHECK COOLING FAN MOTOR-1 

    Refer to "COMPONENT INSPECTION ".

    OK or NG 

    OK: GO TO  8.

    NG: Replace cooling fan motor.

  8. CHECK INTERMITTENT INCIDENT 

    Perform "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT ".

    : INSPECTION END 

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