Engine Switch Illumination Circuit

LIGHTING: LIGHTING SYSTEM: Engine Switch Illumination Circuit
- Engine Switch Illumination Circuit

DESCRIPTION

The engine switch illumination is controlled by the main body ECU. The operation and condition of this control are described below (Light control switch is OFF).





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. PERFORM ACTIVE TEST USING TECHSTREAM

(a) Connect Techstream to the DLC3.

(b) Turn the engine switch on (IG).

(c) Turn Techstream on.

(d) Select the following menu items: Body Electrical / Main Body / Active Test.

(e) Check the operation.

Main Body:





OK:

Engine switch illumination comes on.

OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
NG -- Continue to next step.

2. INSPECT ENGINE SWITCH

(a) Remove the engine switch.





(b) Apply battery voltage to the engine switch.

(c) Check that the illumination comes on.

OK:





NG -- REPLACE ENGINE SWITCH
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (ENGINE SWITCH - MAIN BODY ECU AND BODY GROUND)

(a) Disconnect the E61 main body ECU connector.





(b) Disconnect the E68 engine switch connector.

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

Standard resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY