AUTOMATIC TRANSMISSION SYSTEM(for 2GR-FSE) TCM Power Source Circuit

DESCRIPTION

When the engine switch is turned on (IG), voltage from the ECM MREL terminal is applied to the EFI MAIN relay. This causes the contacts of the EFI MAIN relay to close, which supplies power to terminal +B of the TCM.

WIRING DIAGRAM

Refer to DTC P0560.

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PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (TCM - BODY GROUND)


    1. Turn the engine switch off.

    2. Disconnect the A41 TCM connectors.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      A41-2 (E1) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (NO. 1 INTEGRATION RELAY - TCM)


    1. Disconnect the No. 1 Integration Relay connector.

    2. Disconnect the A41 TCM connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2G-7 - A41-5 (+B) Always Below 1 Ω
      2G-7 or A41-5 (+B) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    GO TO ECM POWER SOURCE CIRCUIT (ENGINE CONTROL SYSTEM / SFI SYSTEM) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR