Last Modified: 05-13-2024 6.11:8.1.0 Doc ID: RM10000000276SC
Model Year Start: 2023 Model: GR Corolla Prod Date Range: [09/2022 - 11/2022]
Title: PARK ASSIST / MONITORING: REAR VIEW MONITOR SYSTEM (for Gasoline Model (Dual Knob Radio and Display Receiver)): C1622; Back Camera Disconnected; 2023 MY Corolla Corolla Hatchback GR Corolla [09/2022 - 11/2022]

DTC

C1622

Back Camera Disconnected

DESCRIPTION

This DTC is stored if the radio and display receiver assembly judges that the signals or signal lines between the radio and display receiver assembly and the rear television camera 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 rear television camera assembly signal circuit
  • Harness or connector
  • Rear television camera assembly
  • Radio and display receiver assembly

WIRING DIAGRAM

PROCEDURE

1.

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

(a) Disconnect the I56 radio and display receiver assembly connector.

(b) Disconnect the O115 rear television camera assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

I56-30 (CA+) - O115-6 (CB+)

Always

Below 1 Ω

I56-28 (V+) - O115-3 (CV+)

Always

Below 1 Ω

I56-29 (V-) - O115-2 (CV-)

Always

Below 1 Ω

I56-27 (CGND) - O115-5 (CGND)

Always

Below 1 Ω

I56-26 (CSLD) - Body ground

Always

Below 1 Ω

I56-30 (CA+) or O115-6 (CB+) - Body ground

Always

10 kΩ or higher

I56-28 (V+) or O115-3 (CV+) - Body ground

Always

10 kΩ or higher

I56-29 (V-) or O115-2 (CV-) - Body ground

Always

10 kΩ or higher

I56-27 (CGND) or O115-5 (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 I56 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

I56-29 (V-) - Body ground

Always

Below 1 Ω

I56-27 (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

I56-30 (CA+) - I56-27 (CGND)

Ignition switch ACC

5.5 to 7.05 V
NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

3.

INSPECT REAR TELEVISION CAMERA ASSEMBLY

(a) Reconnect the V22 rear television camera assembly connector.

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

HINT:

A waterproof connector is used for the rear 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

I56-28 (V+) - I55-1 (GND1)

Measurement setting

200 mV/DIV., 50 μs./DIV.

Condition

Ignition switch ON, shift lever in R

HINT:

  • The video waveform changes according to the image sent by the rear television camera assembly.
  • The video waveform is constantly output when the ignition switch is turned to ACC.

*a

Component with harness connected

(Radio and Display Receiver Assembly)

*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 REAR TELEVISION CAMERA ASSEMBLY