Pre-Collision System

PRE-COLLISION SYSTEM: Power Source Circuit

Power Source Circuit

DESCRIPTION

This circuit supplies power to the seat belt control ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE
NOTE:
When the seat belt control ECU is replaced with a new one, INITIALIZATION must be performed. Pre-Collision System

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)




(a) Disconnect the negative (-) terminal cable from the battery.
(b) Disconnect the M21 seat belt control ECU connector.
(c) Connect the negative (-) terminal cable to the battery.
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (GROUND CIRCUIT)




(a) Disconnect the negative (-) terminal cable from the battery.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE SEAT BELT CONTROL ECU