DTC C1622 Back Camera Disconnected

DESCRIPTION

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

DTC Code	DTC Detection Condition	Trouble Area
C1622	Open or short in the rear television camera assembly signal circuit	Harness or connector Rear television camera assembly Multi-media module receiver assembly

WIRING DIAGRAM

Dtc C1622 Back Camera Disconnected. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

INSPECTION PROCEDURE

NOTICE:

When "System initializing" is displayed on the multi-media module receiver assembly after disconnecting the cable from the negative (-) battery terminal, 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/o Side Monitor System) may be needed ().

1.CHECK HARNESS AND CONNECTOR (MULTI-MEDIA MODULE RECEIVER - REAR TELEVISION CAMERA AND BODY GROUND)

Disconnect the F77 multi-media module receiver assembly connector.

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
F77-18 (V+) - S5-2 (CV+)	Always	Below 1 Ω
F77-19 (V-) - S5-1 (CV-)	Always	Below 1 Ω
F77-39 (CA+) - S5-4 (CB+)	Always	Below 1 Ω
F77-40 (CGND) - S5-3 (CGND)	Always	Below 1 Ω
F77-12 (GND1) - Body ground	Always	Below 1 Ω
F77-18 (V+) - Body ground	Always	10 kΩ or higher
F77-19 (V-) - Body ground	Always	10 kΩ or higher
F77-39 (CA+) - Body ground	Always	10 kΩ or higher
F77-40 (CGND) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.CHECK MULTI-MEDIA MODULE RECEIVER ASSEMBLY (CA+, CGND)

Dtc C1622 Back Camera Disconnected. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Reconnect the multi-media module receiver assembly connector.

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

Standard Resistance:
Tester Connection Condition Specified Condition
F77-40 (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
F77-39 (CA+) - F77-40 (CGND) Engine switch on (IG), shift lever in R 5.5 to 7.05 V

Text in Illustration
*a	Component with harness connected (Multi-media Module Receiver Assembly)

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY ()

OK

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

Reconnect the S5 rear television camera assembly connector.

Dtc C1622 Back Camera Disconnected. PARK ASSIST / MONITORING. Land Cruiser URJ200 URJ202 GRJ200 VDJ200

Text in Illustration
*a	Component with harness connected (Multi-media Module Receiver Assembly)	*b	Waveform A
*c	Waveform A	*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.

Measurement Condition
Item	Content
Tester No. (Symbol)	F77-18 (V+) - F77-40 (CGND)
Tool Setting	0.2 V/DIV., 50 μS/DIV
Condition	Waveform A: Engine starts, shift lever in R (camera lens is not covered, displaying an image) Waveform B: Engine starts, shift lever in R (camera lens is covered, blacking out the screen)

OK:
Waveform is as shown in the illustration.

REPLACE REAR TELEVISION CAMERA ASSEMBLY ()

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY ()