Toyota 4Runner manuals

Toyota 4Runner: Display Signal Circuit between Navigation Receiver Assembly and Television Camera Assembly

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Park Assist / Monitoring / Rear View Monitor System(for Navigation Receiver Type) / Display Signal Circuit between Navigation Receiver Assembly and Television Camera Assembly

DESCRIPTION

This is the display signal circuit between the navigation receiver assembly and the television camera assembly.

WIRING DIAGRAM


PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the G38 navigation receiver assembly connector.

(b) Disconnect the Y2 rear television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G38-11 (CA+) - Y2-6 (CB+)

Always

Below 1 Ω

G38-12 (V+) - Y2-3 (CV+)

Always

Below 1 Ω

G38-23 (CGND) - Y2-5 (CGND)

Always

Below 1 Ω

G38-24 (V-) - Y2-2 (CV-)

Always

Below 1 Ω

G38-11 (CA+) - Body ground

Always

10 kΩ or higher

G38-12 (V+) - Body ground

Always

10 kΩ or higher

G38-23 (CGND) - Body ground

Always

10 kΩ or higher

G38-24 (V-) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

CHECK NAVIGATION RECEIVER ASSEMBLY


(a) Reconnect the G38 navigation receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G38-23 (CGND) - Body ground

Always

Below 1 Ω

G38-24 (V-) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G38-11 (CA+) - G38-23 (CGND)

Ignition switch ACC

5.5 to 7.05 V

Text in Illustration

*a

Component with harness connected

(Navigation Receiver Assembly)


NG

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

OK

3.

CHECK REAR TELEVISION CAMERA ASSEMBLY

(a) Reconnect the Y2 rear television camera assembly connector.

(b) Check the waveform of the rear television camera assembly using an oscilloscope.

HINT:

A waterproof connector is used for the rear television camera assembly. Therefore, inspect the waveform at the navigation receiver assembly with the connector connected.

Text in Illustration

*a

Component with harness connected

(Navigation Receiver Assembly)

*b

Waveform 1 (under normal conditions)

*c

Waveform 2 (camera lens is covered, blacking out the screen)

*d

Synchronized Signal

*e

Video Waveform

-

-

OK:

Waveform is as shown in the illustration.

Item

Content

Terminal No. (Symbol)

G38-12 (V+) - G38-24 (V-)

Tool Setting

200 mV/DIV., 50 μsec./DIV.

Condition

Ignition switch ON, shift lever in R

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.


OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE


NG

REPLACE REAR TELEVISION CAMERA ASSEMBLY

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