TIRE PRESSURE WARNING SYSTEM ECU Power Source Circuit

DESCRIPTION

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

WIRING DIAGRAM

B001D6JE64
*a from IG Circuit
*b ECU-IG NO.1
*c Tire Pressure Warning ECU and Receiver

CAUTION / NOTICE / HINT

Note


  • When replacing the tire pressure warning ECU and receiver, first use the GTS to record all of the current IDs and registered tires with transmitters (4 or 5 tires) of the tire pressure warning valve and transmitter registered to the tire pressure warning ECU and receiver.

  • It is necessary to perform initialization 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 (TIRE PRESSURE WARNING ECU AND RECEIVER POWER SOURCE)


    1. B001FELC14
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the R41 tire pressure warning ECU and receiver connector.

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

      Standard Voltage
      Tester Connection Condition Specified Condition
      R41-1 (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
      Tester Connection Condition Specified Condition
      R41-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER for 3 door: Click here
    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER for 5 door: Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR