BE/Body Electrical Systems — ECU Power Source Circuit, page 193

BE–193
BODY ELECTRICAL SYSTEM – CRUISE CONTROL SYSTEM

ECU Power Source Circuit

CIRCUIT DESCRIPTION

The ECU power source supplies power to the actuator and sensors, etc. Terminal GND and the cruise control ECU case are grounded.

WIRING DIAGRAM

Ignition Switch
J/B No.1  ECU-IG
Cruise Control ECU

4    4
1B ←→ 1J    W    B-Y    5    9    B-R    B
7    4    1J ←→ 1I    14

AM1
2
2

ALT
2
2A

Battery

1    13
1J ←→ 1H    W-B    GND
13

W-B

N12781

INSPECTION PROCEDURE

1    Check ECU–IG fuse.

J/B No.1
ECU-IG Fuse

N08843

P    Remove ECU–IG fuse from J/B No.1.

OK    Check continuity of ECU–IG fuse.

OK    Continuity

OK

NG    Check for short in all the harness and components connected to the ECU–IG fuse (See attached wiring diagram).