Reverse Signal Circuit

NAVIGATION: NAVIGATION SYSTEM: Reverse Signal Circuit

Reverse Signal Circuit

DESCRIPTION

The navigation ECU receives a reverse signal from the BK/UP LP relay and information about the GPS antenna, and then adjusts vehicle position.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK BACK-UP LIGHT
(a) Move the shift lever to the R position and check if the back-up lights turn on.
OK:
The back-up lights turn on.
NG -- GO TO LIGHTING SYSTEM
OK -- Continue to next step.

2. CHECK WIRE HARNESS (BK/UP LP RELAY - NAVIGATION ECU AND BODY GROUND)




(a) Disconnect the N3 ECU connector.
(b) Disconnect the 3H engine room relay block connector.
(c) Measure the resistance of the wire harness side connectors.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE NAVIGATION ECU