Toyota Avalon Service & Repair Manual: 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 television camera assembly, and the radio and display receiver 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 television camera assembly signal circuit

  • Harness or connector
  • Television camera assembly
  • Radio and display receiver assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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 may be needed.

Click here

PROCEDURE

1.

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

(a) Disconnect the G2 radio and display receiver assembly connector.

(b) Disconnect the P19 television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-30 (CA+) - P19-6 (CB+)

Always

Below 1 Ω

G2-28 (V+) - P19-3 (CV+)

Always

Below 1 Ω

G2-29 (V-) - P19-2 (CV-)

Always

Below 1 Ω

G2-27 (CGND) - P19-5 (CGND)

Always

Below 1 Ω

G2-26 (CSLD) - Body ground

Always

10 kΩ or higher

G2-30 (CA+) or P19-6 (CB+) - Body ground

Always

10 kΩ or higher

G2-28 (V+) or P19-3 (CV+) - Body ground

Always

10 kΩ or higher

G2-29 (V-) or P19-2 (CV-) - Body ground

Always

10 kΩ or higher

G2-27 (CGND) or P19-5 (CGND) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

2.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Reconnect the G2 radio and display receiver assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G2-29 (V-) - Body ground

Always

Below 1 Ω

G2-27 (CGND) - Body ground

Always

Below 1 Ω

*a

Component with harness connected

(Radio and Display Receiver Assembly)

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G2-30 (CA+) - G2-27 (CGND)

Engine switch on (ACC)

5.5 to 7.05 V

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

3.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (V+, GND1)

(a) Reconnect the P19 television camera assembly connector.

(b) Using an oscilloscope, check the waveform of the television camera assembly.

*a

Component with harness connected

(Radio and Display Receiver Assembly)

HINT:

A waterproof connector is used for the television camera assembly. Therefore, inspect the waveform at the radio and display receiver assembly with the connector connected.

OK:

Waveform is similar to that shown in the illustration.

Item

Content

Measurement terminal

G2-28 (V+) - G3-1 (GND1)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Engine switch on (IG), shift lever in R

HINT:

  • The video waveform changes according to the image sent by the television camera assembly.
  • The video waveform is constantly output when the engine switch is on (ACC).

*a

Waveform 1 (camera lens is not covered, displaying an image)

*b

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

*c

Synchronization Signal

*d

Video Waveform

OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

REPLACE TELEVISION CAMERA ASSEMBLY

    Back Camera Power Supply Failure (C1621)

    Open or Short in Steering Angle Sensor +B (C1625)

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