Toyota 4Runner: Reverse Signal Circuit

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Navigation / Multi Info Display / Navigation System / 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 ).

(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.

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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

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

Text in Illustration

*a	Front view of wire harness connector (to Navigation Receiver Assembly)

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.

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

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:

Tester Connection	Switch Condition	Specified Condition
B42-2 (RB) - Body ground	Ignition switch ON	11 to 14 V

Text in Illustration

*a	Component without harness connected (Park/neutral Position Switch Assembly)

Result	Proceed to
NG	A
OK (for A750E)	B
OK (for A750F)	C

REPAIR OR REPLACE HARNESS OR CONNECTOR

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (forA750E)

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (for A750F)

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