Toyota Tundra Service Manual: 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

A

USE SIMULATION METHOD TO CHECK

B

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.

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

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

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

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

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

A

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

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

A

5.

CHECK TELEVISION CAMERA ASSEMBLY

(a) Using an oscilloscope, check the waveform.

Text in Illustration

*a

Component with harness connected

(Radio and Display Receiver Assembly)

*b

Waveform 1

*c

Waveform 2

*d

Synchronized Signal

*e

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.

OK

USE SIMULATION METHOD TO CHECK

NG

6.

REPLACE TELEVISION CAMERA ASSEMBLY

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

NEXT

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

A

END (TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE)

B

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

C

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

    Rear View Monitor System(for Radio And Display Type)

    Diagnostic Trouble Code Chart

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