ECU Power Source Circuit

TIRE PRESSURE WARNING SYSTEM: ECU Power Source Circuit

ECU Power Source Circuit

DESCRIPTION

This is the power source for the tire pressure warning ECU.

WIRING DIAGRAM

INSPECTION PROCEDURE

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

PROCEDURE

1. INSPECT FUSE (ECU-IG)
(a) Remove the ECU-IG fuse from the driver side junction block.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. INSPECT IGNITION RELAY NO. 1

(a) Remove the IG1 relay from the driver side junction block.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:

NG -- REPLACE IGNITION RELAY NO. 1
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODY GROUND)

(a) Disconnect the T10 ECU connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard voltage:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE