COMBUSTION TYPE POWER HEATER SYSTEM Power Heater Alternator Circuit

DTC Code DTC Name
Power Heater Alternator Circuit

DESCRIPTION

The heater assembly receives engine operation signals from the battery current sensor assembly*1 or generator assembly*2. If this circuit is open, the heater assembly will determine that the engine operation signals indicate on. If this circuit is shorted, the heater assembly will determine that the engine operation signals indicate off and the heater assembly will not operate.

  • *1: w/ Stop and Start System

    *2: w/o Stop and Start System

WIRING DIAGRAM

E267501E02

CAUTION / NOTICE / HINT

Note:

First, confirm that there are no malfunctions in the LIN communication systems. Refer to the how to proceed with troubleshooting procedure.

Click here

PROCEDURE

  1. INSPECT GENERATOR ASSEMBLY

    1. Remove the generator assembly.

    2. Inspect the generator assembly.

    Result

    Proceed to

    OK (for 2WW)

    OK (except 2WW)

    NG
    OK (except 2WW)

    CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - GENERATOR ASSEMBLY)Click here

    NG

    REPLACE GENERATOR ASSEMBLY

    OK (for 2WW)

  2. CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - GENERATOR CONTROL ECU ASSEMBLY)

    1. E267497C02

      *a

      Front view of wire harness connector

      (to Heater Assembly)

      Disconnect the heater assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A33-8 (+) - Body ground

      Engine is running (Generator assembly operate)

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - BATTERY CURRENT SENSOR ASSEMBLY)Click here

  3. CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - GENERATOR ASSEMBLY)

    1. E267497C02

      *a

      Front view of wire harness connector

      (to Heater Assembly)

      Disconnect the heater assembly connector.

    2. Measure the voltage according to the value(s) in the table below.

      Standard Voltage

      Tester Connection

      Condition

      Specified Condition

      A33-8 (+) - Body ground

      Engine is running (Generator assembly operate)

      11 to 14 V

    Result

    Proceed to

    OK

    NG
    OK

    PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

    Click here

    NG

    CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - GENERATOR ASSEMBLY)Click here

  4. CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - BATTERY CURRENT SENSOR ASSEMBLY)

    1. Disconnect the A33 heater assembly connector.

    2. Disconnect the A58 battery current sensor assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A33-8 (+) - A58-8 (ALTL)

      Always

      Below 1 Ω

      A33-8 (+) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BATTERY CURRENT SENSOR ASSEMBLY

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK HARNESS AND CONNECTOR (HEATER ASSEMBLY - GENERATOR ASSEMBLY)

    1. Disconnect the A33 heater assembly connector.

    2. Disconnect the B61 generator assembly connector.

    3. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      A33-8 (+) - B61-4 (L)

      Always

      Below 1 Ω

      A33-8 (+) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE GENERATOR ASSEMBLY

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR