TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DTC Code DTC Name
ECU Power Source Circuit

DESCRIPTION

The IG circuit is the power source for the tire pressure warning ECU and receiver.

WIRING DIAGRAM

C307812E01

CAUTION / NOTICE / HINT

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 initializationClick hereafter registrationClick hereof the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

Tip:

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. C250865C30

      *A

      for Sedan

      *B

      for Hatchback

      *C

      for Wagon

      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the L70, L88 or Q15 tire pressure warning ECU and receiver connector.

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

      Standard Voltage

      Table 1. for Sedan:

      Tester Connection

      Condition

      Specified Condition

      L70-1 (IG) - Body ground

      Ignition switch ON

      10 to 16 V

      Ignition switch off

      Below 1 V
      Table 2. for Hatchback:

      Tester Connection

      Condition

      Specified Condition

      L88-1 (IG) - Body ground

      Ignition switch ON

      10 to 16 V

      Ignition switch off

      Below 1 V
      Table 3. for Wagon:

      Tester Connection

      Condition

      Specified Condition

      Q15-1 (IG) - Body ground

      Ignition switch ON

      10 to 16 V

      Ignition switch off

      Below 1 V

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

      Standard Resistance

      Table 4. for Sedan:

      Tester Connection

      Condition

      Specified Condition

      L70-12 (GND) - Body ground

      Always

      Below 1 Ω
      Table 5. for Hatchback:

      Tester Connection

      Condition

      Specified Condition

      L88-12 (GND) - Body ground

      Always

      Below 1 Ω
      Table 6. for Wagon:

      Tester Connection

      Condition

      Specified Condition

      Q15-12 (GND) - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

    for Sedan:Click here

    for Wagon:Click here

    for Hatchback:Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR