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

B006ANYE01

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

w/o Stop and Start System:

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

PROCEDURE


  1. CHECK HARNESS AND CONNECTOR (IG TERMINAL)


    1. Disconnect the L48*1 or L110*2 tire pressure warning ECU and receiver connector.


      • *1: except RHD and w/ Light Auto Turn-off System (w/ Delay Function)

      • *2: for RHD and w/ Light Auto Turn-off System (w/ Delay Function)

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

      Standard Voltage
      except RHD and w/ Light Auto Turn-off System (w/ Delay Function)
      Tester Connection Condition Specified Condition
      L48-1 (IG) - Body ground Engine switch on (IG) 10 to 16 V
      Engine switch off Below 1 V
      for RHD and w/ Light Auto Turn-off System (w/ Delay Function)
      Tester Connection Condition Specified Condition
      L110-1 (IG) - Body ground Engine switch on (IG) 10 to 16 V
      Engine switch off Below 1 V
      Result
      Proceed to
      OK
      NG (w/ Stop and Start System)
      NG (w/o Stop and Start System)

    NG (w/ Stop and Start System)

    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) for 8GR-FKS: Click here
    INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT) for V35A-FTS: Click here

    NG (w/o Stop and Start System)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  2. CHECK HARNESS AND CONNECTOR (GND TERMINAL)


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

      Standard Resistance
      except RHD and w/ Light Auto Turn-off System (w/ Delay Function)
      Tester Connection Condition Specified Condition
      L48-12 (GND) - Body ground Always Below 1 Ω
      for RHD and w/ Light Auto Turn-off System (w/ Delay Function):
      Tester Connection Condition Specified Condition
      L110-12 (GND) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER except RHD and w/ Light Auto Turn-off System (w/ Delay Function): REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here
    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER for RHD and w/ Light Auto Turn-off System (w/ Delay Function): REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR