Reverse Signal Circuit
NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Reverse Signal Circuit
Reverse Signal Circuit
DESCRIPTION
The navigation ECU receives a reverse signal from the multi-display and information from the GPS antenna, and then adjusts vehicle position.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. CHECK BACK-UP LIGHT
(a) Move the shift lever to R and check if the back-up lights come on.
OK:
The back-up lights come on.
NG -- GO TO LIGHTING SYSTEM
OK -- Continue to next step.
2. CHECK VEHICLE SIGNAL (DISPLAY CHECK MODE)
(a) Enter the "Display Check" mode (Vehicle Signal Check Mode) Operation Check.
(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 second. As a result, it is normal for the display to lag behind the actual change in the switch.
NG -- INSPECT MULTI-DISPLAY
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)
(a) Disconnect multi-display connector and navigation ECU connector.
(b) 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.
4. INSPECT NAVIGATION ECU
(a) Reconnect the multi-display connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPLACE MULTI-DISPLAY
OK -- REPLACE NAVIGATION ECU
5. INSPECT MULTI-DISPLAY
(a) Disconnect the multi-display connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - MAIN BODY ECU LH)
OK -- REPLACE MULTI-DISPLAY
6. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - MAIN BODY ECU LH)
(a) Disconnect the multi-display connector and main body ECU LH (cowl side junction block LH) connector.
(b) 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.
7. CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - MAIN BODY ECU LH)
(a) Disconnect the main body ECU LH (cowl side junction block LH) connector.
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MAIN BODY ECU LH