DTC C1622 Open or Short Circuit in Back Camera Signal

DESCRIPTION

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

DTC Code	DTC Detection Condition	Trouble Area
C1622	An open or short in the rear television camera signal circuit	Harness or connector Rear television camera assembly Parking assist ECU

WIRING DIAGRAM

Dtc C1622 Open Or Short Circuit In Back Camera Signal. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

When "System initializing" is displayed on the parking assist ECU after the battery terminal disconnected, correct the steering angle neutral point ().

Depending on the parts that are replaced or operations that are performed during vehicle inspection or maintenance, calibration of other systems as well as the parking assist monitor system (w/ Side Monitor System) may be needed ().

1.CHECK HARNESS AND CONNECTOR (PARKING ASSIST ECU - REAR TELEVISION CAMERA AND BODY GROUND)

Disconnect the F75 and F76 parking assist ECU connectors.

Disconnect the S5 rear television camera assembly connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
F76-38 (CV-) - S5-1 (CV-)	Always	Below 1 Ω
F76-15 (CV+) - S5-2 (CV+)	Always	Below 1 Ω
F76-14 (CB+) - S5-4 (CB+)	Always	Below 1 Ω
F76-37 (CGND) - S5-3 (CGND)	Always	Below 1 Ω
F75-4 (GND1) - Body ground	Always	Below 1 Ω
F76-38 (CV-) - Body ground	Always	10 kΩ or higher
F76-15 (CV+) - Body ground	Always	10 kΩ or higher
F76-14 (CB+) - Body ground	Always	10 kΩ or higher
F76-37 (CGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.CHECK PARKING ASSIST ECU (CB+, CGND)

Dtc C1622 Open Or Short Circuit In Back Camera Signal. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Reconnect the F75 and F76 parking assist ECU connectors.

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

Standard Resistance:
Tester Connection Condition Specified Condition
F76-37 (CGND) - Body ground Always Below 1 Ω

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

Standard Voltage:
Tester Connection Condition Specified Condition
F76-14 (CB+) - F76-37 (CGND) Engine switch on (IG), shift lever in R 5.5 to 7.05 V

Text in Illustration
*a	Component with harness connected (Parking Assist ECU)

REPLACE PARKING ASSIST ECU ()

OK

3.CHECK REAR TELEVISION CAMERA ASSEMBLY (CV+, CGND)

Reconnect the S5 rear television camera assembly connector.

Dtc C1622 Open Or Short Circuit In Back Camera Signal. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Text in Illustration
*a	Component with harness connected (Parking Assist ECU)	*b	Waveform A
*c	Waveform B	*d	Synchronization Signal
*e	Video Waveform	-	-

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 multi-media module receiver assembly with the connector connected.

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

Item	Content
Terminal No. (Symbol)	F76-15 (CV+) - F76-37 (CGND)
Tool Setting	200 mV/DIV., 50 μsec./DIV.
Condition	Waveform A: Engine switch on (IG), shift lever in R and camera lens is not covered, displaying an image Waveform B: Engine switch on (IG), shift lever in R and camera lens is covered, blacking out the screen

OK:
Waveform is as shown in the illustration.

REPLACE REAR TELEVISION CAMERA ASSEMBLY ()

REPLACE PARKING ASSIST ECU ()