ECU Power Source Circuit

THEFT DETERRENT SYSTEM: ECU Power Source Circuit

ECU Power Source Circuit

DESCRIPTION

This circuit provides power for multiplex network body ECU operation.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. INSPECT FUSE (ECU-B NO.1)
(a) Remove the ECU-B No.1 fuse from the fusible link block.
(b) Measure the resistance.
Resistance:
Below 1 Ohms
NG -- REPLACE FUSE
OK -- Continue to next step.
2. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (MULTIPLEX NETWORK BODY ECU) (POWER SOURCE)
(a) Install the ECU-B No.1 fuse to the fusible link block.





(b) Disconnect the 1D J/B connector.
(c) Measure the voltage according to the value(s) in the table below.
Voltage:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (INSTRUMENT PANEL J/B (BODY ECU) - BODY GROUND)





(a) Disconnect the 1F and 1M J/B connectors.
(b) Measure the resistance according to the value(s) in the table below.
Resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE INSTRUMENT PANEL J/B ASSEMBLY