Toyota 4Runner manuals

Toyota 4Runner: Reverse Signal Circuit

DESCRIPTION

The radio and display receiver assembly receives a reverse signal from the park/neutral position switch assembly.

WIRING DIAGRAM


PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)

(a) Disconnect the G49 radio and display receiver assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

G49-2 (REV) - Body ground

Ignition switch ON

Shift lever in R

11 to 14 V

G49-2 (REV) - Body ground

Ignition switch ON

Shift lever in any position other than R

Below 1 V


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARK/NEUTRAL POSITION SWITCH ASSEMBLY)

(a) Disconnect the G49 radio and display 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

G49-2 (REV) - B42-1 (RL)

Always

Below 1 Ω

G49-2 (REV) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

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

Front view of wire harness connector

(to 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


C

REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY

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