Reverse Signal Circuit

DESCRIPTION

The navigation ECU receives a reverse signal from the multi-display and information about the GPS antenna, and then adjusts vehicle position.

WIRING DIAGRAM

INSPECTION PROCEDURE

1. CHECK BACK-UP LIGHT

1. Move the shift lever to the R position and check if the back-up lights come on.

   OK:

   The back-up lights come on.
   

NG	GO TO LIGHTING SYSTEM

OK

2. CHECK VEHICLE SIGNAL (DISPLAY CHECK MODE)

1. Enter the "Display Check" mode (Vehicle Signal Check Mode) (Click here).

2. Check that the display changes between ON and OFF according to the shift lever operation (P and R).

   OK:

   Shift Lever Position	Display
   Reverse	ON
   Except Reverse	OFF

   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	Go to step 5

OK

3. CHECK HARNESS AND CONNECTOR (NAVIGATION ECU - MULTI-DISPLAY)

1. Disconnect multi-display connector p1 and navigation ECU connector p2.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   REV2 - REV	Always	Below 1 Ω
   REV2 - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4. INSPECT MULTI-DISPLAY

1. Reconnect the multi-display connector p1.

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage:

   Tester Connection	Condition	Specified condition
   REV - Body ground	Engine switch is on (IG). Shift lever is moved to Reverse position.	10 to 14 V
   REV - Body ground	Engine switch is on (IG). Shift lever is moved to any position except Reverse.	Below 1 V

NG	REPLACE MULTI-DISPLAY

OK
REPLACE NAVIGATION ECU

5. INSPECT MULTI-DISPLAY

1. Disconnect the multi-display connector J50.

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage:

   Tester Connection	Condition	Specified condition
   REV - Body ground	Engine switch is on (IG). Shift lever is moved to Reverse position.	10 to 14 V
   REV - Body ground	Engine switch is on (IG). Shift lever is moved to any position except Reverse.	Below 1 V

OK	REPLACE MULTI-DISPLAY

NG

6. CHECK HARNESS AND CONNECTOR (MULTI-DISPLAY - COWL SIDE J/B LH)

1. Disconnect the multi-display connector J50 and cowl side J/B LH connector Q2.

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

   Standard resistance:

   Tester Connection	Condition	Specified Condition
   REV - Back	Always	Below 1 Ω
   REV - Body ground	Always	10 kΩ or higher

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7. CHECK HARNESS AND CONNECTOR (JUNCTION CONNECTOR - COWL SIDE J/B LH)

1. Disconnect the main body ECU LH (cowl side J/B LH) connector LJ.

2. Measure the voltage according to the value(s) in the table below.

   Standard voltage:

   Tester Connection	Condition	Specified condition
   BKUP - Body ground	Engine switch is on (IG). Shift lever is moved to Reverse position.	10 to 14 V
   BKUP - Body ground	Engine switch is on (IG). Shift lever is moved to any position except Reverse.	Below 1 V

NG	REPAIR OR REPLACE HARNESS OR CONNECTOR

OK
REPLACE MAIN BODY ECU LH (COWL SIDE J/B LH)