TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DESCRIPTION

This is the power source for the tire pressure warning ECU and receiver.

WIRING DIAGRAM

A01FE04E03

INSPECTION PROCEDURE

Note


  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the GTS and write them down before removal.

  • It is necessary to perform initialization Click here after registration Click here of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

Tech Tips

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND)


    1. A01FDNNE04
      Text in Illustration
      *A except GRL10R-BEZQHQ and GRL11R-BETQHQ
      *B for GRL10R-BEZQHQ and GRL11R-BETQHQ
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the tire pressure warning ECU and receiver connector.

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

      Standard Voltage
      except GRL10R-BEZQHQ and GRL11R-BETQHQ
      Tester Connection Switch Condition Specified Condition
      T32-1 (IG) - Body ground Engine switch on (IG) 10 to 16 V
      Engine switch off Below 1 V
      for GRL10R-BEZQHQ and GRL11R-BETQHQ
      Tester Connection Switch Condition Specified Condition
      U22-1 (IG) - Body ground Engine switch on (IG) 10 to 16 V
      Engine switch off Below 1 V

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

      Standard Resistance
      except GRL10R-BEZQHQ and GRL11R-BETQHQ
      Tester Connection Condition Specified Condition
      T32-12 (GND) - Body ground Always Below 1 Ω
      for GRL10R-BEZQHQ and GRL11R-BETQHQ
      Tester Connection Condition Specified Condition
      U22-12 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      NG A
      OK (except GRL10R-BEZQHQ and GRL11R-BETQHQ) B
      OK (for GRL10R-BEZQHQ and GRL11R-BETQHQ) C

    B

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    C

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    A

    REPAIR OR REPLACE HARNESS OR CONNECTOR