Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Image from Camera for Rear View Monitor is Abnormal

Toyota Tacoma 2015-2018 Service Manual / Park Assist / Monitoring / Rear View Monitor System / Image from Camera for Rear View Monitor is Abnormal

DESCRIPTION

The display signal of the rear television camera assembly is transmitted to the radio and display receiver assembly*1 or navigation receiver assembly*2.

  • *1: w/o Navigation System
  • *2: w/ Navigation System

WIRING DIAGRAM

PROCEDURE

PROCEDURE

1.

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 5

A

2.

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

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

Always

Below 1 Ω

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

Always

Below 1 Ω

R32-11 (CA+) - Body ground

Always

10 kΩ or higher

R32-12 (V+) - Body ground

Always

10 kΩ or higher

R32-24 (V-) - Body ground

Always

10 kΩ or higher

R32-23 (CGND) - Body ground

Always

10 kΩ or higher

(d) Reconnect the radio and display receiver assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

3.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

R32-24 (V-) - Body ground

Always

10 kΩ or higher

R32-23 (CGND) - Body ground

Always

10 kΩ or higher

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

R32-11 (CA+) - R32-23 (CGND)

Ignition switch ON, shift lever in R

5.5 to 7.05 V

Text in Illustration

*a

Component with harness connected

(Radio and Display Receiver Assembly)

NG

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

OK

4.

INSPECT REAR TELEVISION CAMERA ASSEMBLY

(a) Reconnect the rear television camera assembly connector.

(b) Check the waveform of the rear television camera assembly using an oscilloscope.

Text in Illustration

*a

Component with harness connected

(Radio and Display Receiver 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.

Measurement Condition

Item

Content

Terminal No. (Symbol)

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

Tool Setting

200 mV/DIV., 50 μsec./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:

OK:

Waveform is as shown in the illustration.

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

Text in Illustration

*a

Waveform 1

*b

Waveform 2

*c

Synchronized Signal

*d

Video Waveform

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR TELEVISION CAMERA ASSEMBLY

5.

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

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

Always

Below 1 Ω

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

Always

Below 1 Ω

N26-11 (CA+) - Body ground

Always

10 kΩ or higher

N26-12 (V+) - Body ground

Always

10 kΩ or higher

N26-24 (V-) - Body ground

Always

10 kΩ or higher

N26-23 (CGND) - Body ground

Always

10 kΩ or higher

(d) Reconnect the navigation receiver assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

INSPECT NAVIGATION RECEIVER ASSEMBLY

(a) Disconnect the navigation receiver assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

N26-24 (V-) - Body ground

Always

10 kΩ or higher

N26-23 (CGND) - Body ground

Always

10 kΩ or higher

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

N26-11 (CA+) - N26-23 (CGND)

Ignition switch ON, shift lever in R

5.5 to 7.05 V

Text in Illustration

*a

Component with harness connected

(Navigation Receiver Assembly)

NG

REPLACE NAVIGATION RECEIVER ASSEMBLY

OK

7.

INSPECT REAR TELEVISION CAMERA ASSEMBLY

(a) Reconnect the rear television camera assembly connector.

(b) Check the waveform of the rear television camera assembly using an oscilloscope.

Text in Illustration

*a

Component with harness connected

(Navigation Receiver Assembly)

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.

Measurement Condition

Item

Content

Terminal No. (Symbol)

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

Tool Setting

200 mV/DIV., 50 μsec./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:

OK:

Waveform is as shown in the illustration.

HINT:

The video waveform changes according to the image sent by the rear television camera assembly.

Text in Illustration

*a

Waveform 1

*b

Waveform 2

*c

Synchronized Signal

*d

Video Waveform

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

REPLACE REAR TELEVISION CAMERA ASSEMBLY

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