Reverse Signal Circuit

NAVIGATION: NAVIGATION SYSTEM: Reverse Signal Circuit

Reverse Signal Circuit

DESCRIPTION

The navigation ECU receives a reverse signal from the main body ECU LH and information about the GPS antenna, and then adjusts vehicle position.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK VEHICLE SIGNAL (DISPLAY CHECK MODE)





(a) Enter the "Display Check" mode (Vehicle Signal Check Mode) Display Check Mode.
(b) Check that the display changes between ON and OFF according to the shift lever operation (P and R).
OK:





HINT:
This display is updated once per seconds. As a result, it is normal for the display to lag behind the actual change in the switch.

NG -- CHECK MAIN BODY ECU LH
OK -- Continue to next step.
2. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)





(a) Disconnect multi-display connector.





(b) Disconnect navigation 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.
3. INSPECT MULTI-DISPLAY





(a) Reconnect the multi-display connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard resistance:






NG -- REPLACE MULTI-DISPLAY
OK -- REPLACE NAVIGATION ECU
4. CHECK MAIN BODY ECU LH





(a) Measure the voltage of the junction block.
Standard voltage:






NG -- REPLACE MAIN BODY ECU LH
OK -- Continue to next step.
5. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - MAIN BODY ECU LH)





(a) Disconnect the L97 display connector.
(b) Disconnect the W2 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 -- REPLACE MULTI-DISPLAY