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Diagnosis Procedure

  1. CHECK FUEL PUMP RELAY POWER SUPPLY-I
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between ECM harness connector terminals.
      ECM Voltage
      + -
      Connector Terminal Connector Terminal
      F7 14 E16 112 Battery voltage

      Is the inspection result normal? 

      YES: GO TO  4.

      NO: GO TO 2.

  2. CHECK FUEL PUMP RELAY POWER SUPPLY-II

    Check the voltage between IPDM E/R harness connector and ground.

    IPDM E/R Ground Voltage
    Connector Terminal
    F12 77 Ground Battery voltage

    Is the inspection result normal? 

    YES: GO TO 3.

    NO: GO TO  11.

  3. CHECK FUEL PUMP RELAY POWER SUPPLY CIRCUIT
    1. Turn ignition switch OFF.
    2. Disconnect IPDM E/R harness connector.
    3. Check the continuity between ECM harness connector and IPDM E/R harness connector.
      ECM IPDM E/R Continuity
      Connector Terminal Connector Terminal
      F7 14 F12 77 Existed

      Is the inspection result normal? 

      YES: Perform the trouble diagnosis for power supply circuit.

      NO: Repair or replace error-detected parts.

  4. CHECK CONDENSER POWER SUPPLY
    1. Turn ignition switch OFF.
    2. Reconnect all harness connectors disconnected.
    3. Disconnect condenser harness connector.
    4. Turn ignition switch ON.
    5. Check the voltage between condenser harness connector and ground.
      Condenser Ground Voltage
      Connector Terminal
      B81 1 Ground Battery voltage should exist for 1 second after ignition switch is turned ON.

      Is the inspection result normal? 

      YES: GO TO  6.

      NO: GO TO 5.

  5. CHECK CONDENSER POWER SUPPLY CIRCUIT
    1. Disconnect IPDM E/R harness connector.
    2. Check the continuity between IPDM E/R harness connector and condenser harness connector.
      IPDM E/R Condenser Continuity
      Connector Terminal Connector Terminal
      E10 13 B81 1 Existed
    3. Also check harness for short to ground and short to power.

      Is the inspection result normal? 

      YES: GO TO  11.

      NO: Perform the trouble diagnosis for power supply circuit.

  6. CHECK CONDENSER GROUND CIRCUIT
    1. Turn ignition switch OFF.
    2. Check the continuity between condenser harness connector and ground.
      Condenser Ground Continuity
      Connector Terminal
      B81 2 Ground Existed
    3. Also check harness for short to power.

      Is the inspection result normal? 

      YES: GO TO 7.

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

  7. CHECK CONDENSER

    Check condenser. Refer to "COMPONENT INSPECTION (CONDENSER) ".

    Is the inspection result normal? 

    YES: GO TO 8.

    NO: Replace condenser.

  8. CHECK FUEL PUMP POWER SUPPLY CIRCUIT
    1. Disconnect "fuel level sensor unit and fuel pump" harness connector.
    2. Check harness continuity between IPDM E/R harness connector and "fuel level sensor unit and fuel pump" harness connector.
      IPDM E/R Fuel level sensor unit and fuel pump Continuity
      Connector Terminal Connector Terminal
      E10 13 B40 1 Existed

      Is the inspection result normal? 

      YES: GO TO 9.

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

  9. CHECK FUEL PUMP GROUND CIRCUIT
    1. Disconnect "fuel level sensor unit and fuel pump" harness connector.
    2. Check the continuity between "fuel level sensor unit and fuel pump" harness connector and ground.
      Fuel level sensor unit and fuel pump Ground Continuity
      Connector Terminal
      B40 3 Ground Existed

      Is the inspection result normal? 

      YES: GO TO 10.

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

  10. CHECK FUEL PUMP

    Check fuel pump. Refer to "COMPONENT INSPECTION (FUEL PUMP) ".

    Is the inspection result normal? 

    YES: GO TO 11.

    NO: Replace fuel pump. Refer to "REMOVAL AND INSTALLATION ".

  11. CHECK INTERMITTENT INCIDENT

    Check intermittent incident. Refer to "INTERMITTENT INCIDENT ".

    Is the inspection result normal? 

    YES: Replace IPDM E/R. Refer to "REMOVAL AND INSTALLATION ".

    NO: Repair or replace error-detected parts.

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