Pre-Collision System

PRE-COLLISION: PRE-COLLISION SYSTEM: Power Source Circuit

Power Source Circuit

DESCRIPTION

This circuit supplies power to the seat belt control ECU when the engine switch is on (IG).

WIRING DIAGRAM

INSPECTION PROCEDURE
HINT: Start the engine before inspection. Check the IG1 NO. 1 relay or battery if the starting system does not start.

PROCEDURE

1. INSPECT FUSE (ECU-IG No. 1, PSB)
(a) Remove the ECU-IG No. 1 and PSB fuses from the main body ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:

NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (SEAT BELT CONTROL ECU - BATTERY AND BODY GROUND)

(a) Disconnect the E41 and E42 seat belt control ECU connectors.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:

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