Toyota 4Runner manuals

Toyota 4Runner: Back Camera Disconnected (C1622)

DESCRIPTION

This DTC is stored if the navigation receiver assembly judges that the signals or signal lines between the navigation 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
  • Navigation receiver assembly

WIRING DIAGRAM


PROCEDURE

1.

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

(a) Disconnect the G38 navigation receiver assembly connector.

(b) Disconnect the Y2 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

G38-11 (CA+) - Y2-6 (CB+)

Always

Below 1 Ω

G38-12 (V+) - Y2-3 (CV+)

Always

Below 1 Ω

G38-23 (CGND) - Y2-5 (CGND)

Always

Below 1 Ω

G38-24 (V-) - Y2-2 (CV-)

Always

Below 1 Ω

G38-11 (CA+) - Body ground

Always

10 kΩ or higher

G38-12 (V+) - Body ground

Always

10 kΩ or higher

G38-23 (CGND) - Body ground

Always

10 kΩ or higher

G38-24 (V-) - Body ground

Always

10 kΩ or higher


NG

REPAIR OR REPLACE HARNESS OR CONNECTOR


OK

2.

INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Reconnect the G38 navigation receiver assembly connector.


*a

Component with harness connected

(Navigation Receiver Assembly)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

G38-23 (CGND) - Body ground

Always

Below 1 Ω

G38-24 (V-) - Body ground

Always

Below 1 Ω

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

G38-11 (CA+) - G38-23 (CGND)

Ignition switch ACC

5.5 to 7.05 V


NG

REPLACE NAVIGATION RECEIVER ASSEMBLY


OK

3.

INSPECT REAR TELEVISION CAMERA ASSEMBLY

(a) Reconnect the Y2 rear television camera assembly connector.

(b) 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 navigation receiver assembly with the connector connected.


*a

Component with harness connected

(Navigation Receiver Assembly)

*b

Waveform 1 (under normal conditions)

*c

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

*d

Synchronized Signal

*e

Video Waveform

-

-

OK:

Waveform is as shown in the illustration.

Item

Content

Terminal No. (Symbol)

G38-12 (V+) - G38-24 (V-)

Tool Setting

200 mV/DIV., 50 μsec./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.


OK

REPLACE NAVIGATION RECEIVER ASSEMBLY


NG

REPLACE REAR TELEVISION CAMERA ASSEMBLY

Diagnostic Trouble Code Chart
DIAGNOSTIC TROUBLE CODE CHART Rear View Monitor System DTC No. Detection Item Link C1622 Back Camera Disconnected ...

Display Signal Circuit between Navigation Receiver Assembly and Television Camera Assembly
DESCRIPTION This is the display signal circuit between the navigation receiver assembly and the television camera assembly. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND ...

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