Dimmer Signal Circuit

NAVIGATION SYSTEM: Dimmer Signal Circuit

Dimmer Signal Circuit

DESCRIPTION

The multi-display dims the display and panel switches by receiving a TAIL cancel signal from the main body ECU.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - MAIN BODY ECU)





(a) Disconnect the M21 display connector.
(b) Disconnect the B5 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.
2. CHECK MAIN BODY ECU (ACAN VOLTAGE)





(a) Reconnect the B5 ECU connector.
(b) Turn the ignition switch ON.
(c) Turn the light control switch to the TAIL or HEAD position.
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:






NG -- GO TO LIGHTING SYSTEM
OK -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE