Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Open or Short Circuit in Back Camera Signal (C1622)

Toyota Tacoma 2015-2018 Service Manual / Park Assist / Monitoring / Rear View Monitor System / Open or Short Circuit in Back Camera Signal (C1622)

DESCRIPTION

This DTC is stored if the radio and display receiver assembly*1 or navigation receiver assembly*2 judges as a result of its self check that the signals or signal lines between the radio and display receiver assembly*1 or navigation receiver assembly*2 and the rear television camera assembly are not normal.

DTC Code

DTC Detection Condition

Trouble Area

C1622

Open or Short Circuit in rear television camera signal

  • Harness or connector
  • Rear television camera assembly
  • Radio and display receiver assembly*1
  • Navigation receiver assembly*2
  • *1: w/o Navigation System
  • *2: w/ Navigation System

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

CHECK FOR DTC

(a) Clear the DTCs (See page (b) Check for DTCs (See page  ). ).

(b) Check for DTCs (See page Result ).

Result

Result

Proceed to

No DTC is output

A

DTC is output

B

A

USE SIMULATION METHOD TO CHECK

B

2.

CONFIRM MODEL

(a) Choose the model to be inspected.

Result

Result

Proceed to

w/o Navigation System

A

w/ Navigation System

B

B

GO TO STEP 9

A

3.

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

(a) Disconnect the R32 radio and display receiver assembly connector.

(b) Disconnect the T22 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

R32-11 (CA+) - T22-6 (CB+)

Always

Below 1 Ω

R32-12 (V+) - T22-3 (CV+)

Always

Below 1 Ω

R32-23 (CGND) - T22-5 (CGND)

Always

Below 1 Ω

R32-24 (V-) - T22-2 (CV-)

Always

Below 1 Ω

R32-11 (CA+) - Body ground

Always

10 kΩ or higher

R32-12 (V+) - Body ground

Always

10 kΩ or higher

R32-23 (CGND) - Body ground

Always

10 kΩ or higher

N26-24 (V-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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

R32-23 (CGND) - Body ground

Always

Below 1 Ω

R32-24 (V-) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Component with harness connected

(Radio and Display Receiver Assembly)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

5.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(a) Disconnect the rear 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

T22-6 (CB+) - T22-5 (CGND)

Ignition switch ACC

5.5 to 7.05 V

Text in Illustration

*a

Front view of wire harness connector

(to Rear Television Camera Assembly)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

6.

CHECK REAR 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

R32-12 (V+) - R32-24 (V-)

Tool Setting

0.2 V/DIV., 50 μs/DIV.

Condition

  • Waveform 1: Ignition switch ON, shift lever in R
  • Waveform 2: Ignition switch ON, shift lever in R, 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 rear television camera assembly.

OK

USE SIMULATION METHOD TO CHECK

NG

7.

REPLACE REAR TELEVISION CAMERA ASSEMBLY

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

NEXT

8.

CHECK FOR DTC

(a) Clear the DTCs (See page (b) Check for DTCs (See page  ). ).

(b) Check for DTCs (See page OK: ).

OK:

No DTCs are output.

OK

END (REAR TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

9.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - REAR TELEVISIONCAMERA ASSEMBLY)

(a) Disconnect the N26 navigation receiver assembly connector.

(b) Disconnect the T22 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

N26-11 (CA+) - T22-6 (CB+)

Always

Below 1 Ω

N26-12 (V+) - T22-3 (CV+)

Always

Below 1 Ω

N26-23 (CGND) - T22-5 (CGND)

Always

Below 1 Ω

N26-24 (V-) - T22-2 (CV-)

Always

Below 1 Ω

N26-11 (CA+) - Body ground

Always

10 kΩ or higher

N26-12 (V+) - Body ground

Always

10 kΩ or higher

N26-23 (CGND) - Body ground

Always

10 kΩ or higher

N26-24 (V-) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

10.

CHECK NAVIGATION RECEIVER ASSEMBLY

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N26-23 (CGND) - Body ground

Always

Below 1 Ω

N26-24 (V-) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

Component with harness connected

(Navigation Receiver Assembly)

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

OK

11.

CHECK NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the rear 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

T22-6 (CB+) - T22-5 (CGND)

Ignition switch ACC

5.5 to 7.05 V

Text in Illustration

*a

Front view of wire harness connector

(to Rear Television Camera Assembly)

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

OK

12.

CHECK REAR TELEVISION CAMERA ASSEMBLY

(a) Using an oscilloscope, check the waveform.

Text in Illustration

*a

Component with harness connected

(Navigation Receiver Assembly)

*b

Waveform 1

*c

Waveform 2

*d

Synchronized Signal

*e

Video Waveform

-

-

Measurement Condition

Item

Content

Tester Connection

N26-12 (V+) - N26-24 (V-)

Tool Setting

0.2 V/DIV., 50 μs/DIV.

Condition

  • Waveform 1: Ignition switch ON, shift lever in R
  • Waveform 2: Ignition switch ON, shift lever in R, 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 rear television camera assembly.

OK

USE SIMULATION METHOD TO CHECK

NG

13.

REPLACE REAR TELEVISION CAMERA ASSEMBLY

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

NEXT

14.

CHECK FOR DTC

(a) Clear the DTCs (See page (b) Check for DTCs (See page  ). ).

(b) Check for DTCs (See page OK: ).

OK:

No DTCs are output.

OK

END (REAR TELEVISION CAMERA ASSEMBLY WAS DEFECTIVE)

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

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