ECU Power Source Circuit

THEFT DETERRENT SYSTEM: ECU Power Source Circuit

ECU Power Source Circuit

DESCRIPTION

This circuit provides power to operate the multiplex network body ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-B)
(a) Remove the ECU-B fuse from the instrument panel J/B.
(b) Measure the resistance of the fuse.
Standard resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSEMBLY - BATTERY)





(a) Disconnect the 2G J/B connector.
(b) Measure the voltage of the wire harness side connector.
Standard voltage:





NG -- REPAIR OR REPLACE HARNESS AND CONNECTOR
OK -- Continue to next step.
3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY





(a) Disconnect the 2G or 2K J/B connectors.
(b) Measure the resistance of the J/B.
Standard resistance:





HINT: *1: Coupe

*2: Convertible

NG -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY
OK -- Continue to next step.
4. CHECK WIRE HARNESS (INSTRUMENT PANEL J/B ASSEMBLY - BODY GROUND)





(a) Disconnect the 2F, 2G or 2K J/B connectors.
(b) Measure the resistance of the wire harness side connectors.
Standard resistance:





HINT: *1: Coupe

*2: Convertible

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