ECU Power Source Circuit

TIRE AND WHEEL: TIRE PRESSURE WARNING SYSTEM: ECU Power Source Circuit
- ECU Power Source Circuit

DESCRIPTION

This is the power source for the tire pressure warning ECU. It also supplies the power to the tire pressure warning antenna and receiver via the ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
It is necessary to perform the initialization Initialization after the registration Registration of the transmitter IDs into the tire pressure warning ECU if the ECU has been replaced.

PROCEDURE

1. INSPECT FUSE (ECU-IG)

(a) Remove the ECU-IG RH fuse from the main body ECU RH.

(b) Measure the resistance of the fuse.

Standard resistance:

Below 1 Ohms

NG -- REPLACE FUSE
OK -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (TIRE PRESSURE WARNING ECU - BATTERY AND BODY GROUND)





(a) Disconnect the K45 connector.

(b) Turn the engine switch on (IG).

(c) Measure the voltage and resistance according to the value(s) in the table below.

Standard voltage:





Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE Symptom Related Diagnostic Procedures