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Home >> Nissan-Datsun >> 2021 >> NV2500 HD S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Control System (DTC/Circuit Diagnosis) (5.6L) (4 Of 6)) >> DTC/Circuit Diagnosis >> DTC P0548: Exhaust Gas Temperature Sensor >> DTC Diagnosis Procedure

DTC Diagnosis Procedure

WARNING: This page is about a different variant/trim than selected.
  1. CHECK EXHAUST GAS TEMPERATURE SENSOR 

    SYMBOL With CONSULT

    1. Turn ignition switch ON.
    2. Select "EXHAUST GAS TEMP SEN 1 B2" in "DATA MONITOR" mode of "ENGINE" using CONSULT.
    3. Start engine and warm it up to normal operating temperature.
    4. Check that "EXHAUST GAS TEMP SEN 1 B2" indication as follows.

      Monitor item

      Condition

      Value

      EXHAUST GAS TEMP SEN 1 B2
      • Warm-up condition
      • Idle speed

      1, 290 - 2, 940 mV

    SYMBOL Without CONSULT

    1. Start engine and warm it up to normal operating temperature.
    2. Check that voltage between ECM harness connector terminals as follows.

      ECM

      Condition

      Voltage

      Connector

      +

      -

      Terminal

      F78

      17

      43
      • Warm-up condition
      • Idle speed

      1.29 - 2.94 V

    Is the inspection result normal?

    YES

    GO TO 2.

    NO

    Replace exhaust gas temperature sensor. Refer to Exploded View .

  2. CHECK EXHAUST GAS TEMPERATURE SENSOR POWER SUPPLY 
    1. Turn ignition switch OFF.
    2. Disconnect exhaust gas temperature sensor harness connector.
    3. Turn ignition switch ON.
    4. Check the voltage between exhaust gas temperature sensor harness connector terminal and ground.

      +

      -

      Voltage

      (Approx.)

      Exhaust gas temperature sensor

      Connector

      Terminal

      F89

      1

      Ground

      5 V

    Is the inspection result normal?

    YES

    GO TO 3.

    NO

    GO TO 4.

  3. CHECK EXHAUST GAS TEMPERATURE SENSOR GROUND CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between exhaust gas temperature sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      Exhaust gas temperature sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F89

      2

      F78

      43

      Existed
    4. Also check harness for short to power.

    Is the inspection result normal?

    YES

    Check intermittent incident. Refer to Intermittent Incident .

    NO

    Repair or replace error-detected parts.

  4. CHECK EXHAUST GAS TEMPERATURE SENSOR POWER SUPPLY CIRCUIT 
    1. Turn ignition switch OFF.
    2. Disconnect ECM harness connector.
    3. Check the continuity between exhaust gas temperature sensor harness connector and ECM harness connector.

      +

      -

      Continuity

      Exhaust gas temperature sensor

      ECM

      Connector

      Terminal

      Connector

      Terminal

      F89

      1

      F78

      17

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

    Is the inspection result normal?

    YES

    Perform the trouble diagnosis for ECM power supply circuit. Refer to DTC Diagnosis Procedure .

    NO

    Repair or replace error-detected parts.

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