Toyota 4Runner: Back Camera Disconnected (C1622)

Toyota 4Runner Service Manual / Audio / Visual / Telematics / Park Assist / Monitoring / Rear View Monitor System(for Radio And Display Type) / Back Camera Disconnected (C1622)

DESCRIPTION

This DTC is stored if the radio and display receiver assembly judges that the signals or signal lines between the radio and display receiver assembly, and the rear television camera assembly are not normal as a result of its self check.

DTC No.	Detection Item	DTC Detection Condition	Trouble Area
C1622	Back Camera Disconnected	Open or short in the rear television camera assembly signal circuit	Harness or connector Rear television camera assembly Radio and display receiver assembly

WIRING DIAGRAM

PROCEDURE

1.	CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - REAR TELEVISION CAMERA ASSEMBLY)

(a) Disconnect the G50 radio and display receiver assembly connector.

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

Standard Resistance (Check for Open):

Tester Connection	Condition	Specified Condition
G50-11 (CA+) - Y2-6 (CB+)	Always	Below 1 Ω
G50-12 (V+) - Y2-3 (CV+)	Always	Below 1 Ω
G50-23 (CGND) - Y2-5 (CGND)	Always	Below 1 Ω
G50-24 (V-) - Y2-2 (CV-)	Always	Below 1 Ω

Standard Resistance (Check for Short):

Tester Connection	Condition	Specified Condition
G50-11 (CA+) - Body ground	Always	10 kΩ or higher
G50-12 (V+) - Body ground	Always	10 kΩ or higher
G50-23 (CGND) - Body ground	Always	10 kΩ or higher
G50-24 (V-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

2.	INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Reconnect the G50 radio and display receiver assembly connector.

*a	Component with harness connected (Radio and Display Receiver Assembly)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
G50-23 (CGND) - Body ground	Always	Below 1 Ω
G50-24 (V-) - Body ground	Always	Below 1 Ω

Standard Voltage:

Tester Connection	Condition	Specified Condition
G50-11 (CA+) - G50-23 (CGND)	Ignition switch ACC	5.5 to 7.05 V

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

3.	INSPECT 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 radio and display receiver assembly with the connector connected.

Component with harness connected

(Radio and Display Receiver Assembly)

Waveform 1 (under normal conditions)

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

Synchronized Signal

Video Waveform

OK:

Waveform is as shown in the illustration.

Item	Content
Terminal No. (Symbol)	G50-12 (V+) - G50-24 (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.

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

REPLACE REAR TELEVISION CAMERA ASSEMBLY

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