ECU Power Source Circuit

THEFT DETERRENT: THEFT DETERRENT SYSTEM: ECU Power Source Circuit
- ECU Power Source Circuit

DESCRIPTION

This circuit provides power for main body ECU operation.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY (MAIN BODY ECU) (POWER SOURCE)

(a) Disconnect the DD and DA J/B connectors.





(b) 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 (INSTRUMENT PANEL J/B, MAIN BODY ECU - BODY GROUND)

(a) Disconnect the DF J/B connector.





(b) Measure the resistance according to the value(s) in the table below.

Standard resistance:





(c) Disconnect the E59 main body ECU connector.





(d) Measure the resistance according to the value(s) in the table below.

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE