Toyota Tundra Service Manual: Open or Short Circuit in Back Camera Signal (C1622)

Toyota Tundra Service Manual / Audio, Visual, Telematics / Park Assist / Monitoring / Rear View Monitor System(for Radio And Display Type) / Open or Short Circuit in Back Camera Signal (C1622)

DESCRIPTION

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

DTC Code	DTC Detection Condition	Trouble Area
C1622	Open or Short Circuit in television camera signal	Harness or connector Television camera assembly Radio and display receiver assembly

WIRING DIAGRAM

PROCEDURE

1.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

Result

Result	Proceed to
No DTC is output	A
DTC is output	B

USE SIMULATION METHOD TO CHECK

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

(a) Disconnect the J140 radio and display receiver assembly connector.

(b) Disconnect the X1 television camera assembly connector.

Standard Resistance:

Tester Connection	Condition	Specified Condition
J140-11 (CA+) - X1-6 (CB+)	Always	Below 1 Ω
J140-12 (V+) - X1-3 (CV+)	Always	Below 1 Ω
J140-23 (CGND) - X1-5 (CGND)	Always	Below 1 Ω
J140-24 (V-) - X1-2 (CV-)	Always	Below 1 Ω
J140-11 (CA+) - Body ground	Always	10 kΩ or higher
J140-12 (V+) - Body ground	Always	10 kΩ or higher
J140-23 (CGND) - Body ground	Always	10 kΩ or higher
J140-24 (V-) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.	CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
J140-23 (CGND) - Body ground	Always	Below 1 Ω
J140-24 (V-) - Body ground	Always	Below 1 Ω

Text in Illustration

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

Result

Result	Proceed to
OK	A
NG (for Column Shift Type)	B
NG (for Floor Shift Type)	C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

4.	CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Disconnect the television camera assembly connector.

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
X1-6 (CB+) - X1-5 (CGND)	Ignition switch ACC	5.5 to 7.05 V

Text in Illustration

*a	Front view of wire harness connector (to Television Camera Assembly)

Result

Result	Proceed to
OK	A
NG (for Column Shift Type)	B
NG (for Floor Shift Type)	C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

5.	CHECK TELEVISION CAMERA ASSEMBLY

(a) Using an oscilloscope, check the waveform.

Text in Illustration

Component with harness connected

(Radio and Display Receiver Assembly)

Waveform 1

Waveform 2

Synchronized Signal

Video Waveform

Measurement Condition

Item	Content
Tester Connection	J140-12 (V+) - J140-24 (V-)
Tool Setting	0.2 V/DIV., 50 μs/DIV.
Condition	Waveform 1: Ignition switch ON Waveform 2: Ignition switch ON, screen blacked out by covering camera lens

OK:

Waveform is as shown in illustration.

HINT:

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

USE SIMULATION METHOD TO CHECK

6.	REPLACE TELEVISION CAMERA ASSEMBLY

(a) Replace the television camera assembly with a new or normally functioning one (See page ).

7.	CHECK FOR DTC

(a) Clear the DTCs (See page ).

(b) Check for DTCs (See page ).

Result

Result	Proceed to
No DTC is output	A
DTC is output (for Column Shift Type)	B
DTC is output (for Floor Shift Type)	C

END (TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE)

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

Rear View Monitor System(for Radio And Display Type)

Diagnostic Trouble Code Chart

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Toyota Tundra Service Manual: Open or Short Circuit in Back Camera Signal (C1622)

Rear View Monitor System(for Radio And Display Type)

Diagnostic Trouble Code Chart

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