Toyota 4Runner manuals

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 ).



(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

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

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

Text in Illustration

*a

Front view of wire harness connector

(to Navigation Receiver Assembly)


OK

REPLACE NAVIGATION RECEIVER ASSEMBLY

NG

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

OK

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)


(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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