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

B002IQUE13

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 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 (ECU - BATTERY AND BODY GROUND)


    1. B002KANC36
      *A except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      *B for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      *a

      Front view of wire harness connector

      (to Tire Pressure Warning ECU and Receiver)

      Disconnect the P11*1 or Q46*2 tire pressure warning ECU and receiver connector.


      • *1: except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label

      • *2: for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label

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

      Standard Voltage
      except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      P11-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      Power switch off Below 1 V
      for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      Q46-1 (IG) - Body ground Power switch on (IG) 10 to 16 V
      Power switch off Below 1 V

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

      Standard Resistance
      except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      P11-12 (GND) - Body ground Always Below 1 Ω
      for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label
      Tester Connection Condition Specified Condition
      Q46-12 (GND) - Body ground Always Below 1 Ω
      Result
      Result Proceed to
      OK (except AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label) A
      OK (for AYZ10R-AWXLBQ or AYZ15R-AWXLBQ Deck Floor Box LH without Compact Spare Tire Caution Label) B
      NG C

    A

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    B

    REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER Click here

    C

    REPAIR OR REPLACE HARNESS OR CONNECTOR