Toyota 4Runner: Reverse Signal Circuit
DESCRIPTION
The navigation receiver assembly receives a reverse signal from the park/neutral position switch assembly.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- After replacing the navigation receiver assembly of vehicles subscribed to pay-type satellite radio broadcasts, registration of the XM radio ID is necessary.
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
CHECK VEHICLE SIGNAL (OPERATION CHECK) |
|
(a) Enter the "Vehicle Signal Check Mode" screen. Refer to check Vehicle
Signal in Operation Check (See page |
|
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).
(b) Check that the display changes between ON and OFF according to the shift lever position.
OK:
|
Shift Lever Position |
Display |
|---|---|
|
R |
ON |
|
Except R |
OFF |
HINT:
This display is updated once per second. As a result, it is normal for the display to lag behind the actual shift lever position.
| OK | .gif) |
PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL) |
|
(a) Disconnect the G37 navigation receiver assembly connector. |
|
(b) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G37-2 (REV) - Body ground |
Ignition switch ON Shift lever in R |
11 to 14 V |
|
Ignition switch ON Shift lever in any position other than R |
Below 1 V |
|
*a |
Front view of wire harness connector (to Navigation Receiver Assembly) |
| OK | |
REPLACE NAVIGATION RECEIVER ASSEMBLY |
|
|
3. |
CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY) |
(a) Disconnect the G37 navigation receiver assembly connector.
(b) Disconnect the B42 park/neutral position switch assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
G37-2 (REV) - B42-1 (RL) |
Always |
Below 1 Ω |
|
G37-2 (REV) - Body ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - BATTERY) |
(a) Disconnect the B42 park/neutral position switch assembly connector.
|
(b) Measure the voltage according to the value(s) in the table below. Standard Voltage:
|
|
(c) Proceed to the next step based on the check result.
|
Result |
Proceed to |
|---|---|
|
NG |
A |
|
OK (for A750E) |
B |
|
OK (for A750F) |
C |
| A | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
| B | |
REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (forA750E) |
| C | |
REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (for A750F) |
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