Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Reverse Signal Circuit

DESCRIPTION

The radio and display receiver assembly*1 or navigation receiver assembly*2 receives a reverse signal from the park/neutral position switch*3 or the back-up light switch assembly*4.

  • *1: w/o Navigation System
  • *2: w/ Navigation System
  • *3: for Automatic Transmission
  • *4: for Manual Transmission

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection 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 8

A

2.

INSPECT RADIO AND DISPLAY RECEIVER ASSEMBLY (REVERSE SIGNAL)

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

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

R31-2 (REV) - Body ground

Ignition switch ON,

shift lever in not R

Below 1 V

Ignition switch ON,

shift lever in R

11 to 14 V

Text in Illustration

*a

Rear view of wire harness connector

(to Radio and Display Receiver Assembly)

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

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

3.

SYSTEM CHECK

(a) Check the vehicle specifications.

Result

Result

Proceed to

for Automatic Transmission

A

for Manual Transmission

B

B

GO TO STEP 6

A

4.

INSPECT PARK/NEUTRAL POSITION SWITCH (IG SIGNAL)

(a) Disconnect the park/neutral position switch connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

P1-2 (RB) - Body ground

Ignition switch ON

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Park/Neutral Position Switch)

(c) Reconnect the park/neutral position switch connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

5.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - PARK/NEUTRAL POSITION SWITCH)

(a) Disconnect the R31 radio and display receiver assembly connector.

(b) Disconnect the P1 park/neutral position switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R31-2 (REV) - P1-1 (RL)

Always

Below 1 Ω

R31-2 (REV) - Body ground

Always

10 kΩ or higher

Result

Result

Proceed to

NG

A

OK (for AC60F)

B

OK (for AC60E)

C

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

(e) Reconnect the park/neutral position switch connector.

A

REPAIR OR REPLACE HARNESS OR CONNECTOR

B

REPLACE PARK/NEUTRAL POSITION SWITCH

C

REPLACE PARK/NEUTRAL POSITION SWITCH

6.

INSPECT BACK-UP LIGHT SWITCH ASSEMBLY (IG SIGNAL)

(a) Disconnect the back-up light switch assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

B1-2 - Body ground

Ignition switch ON

11 to 14 V

Text in Illustration

*A

for 2GR-FKS

*B

for 2TR-FE

*a

Front view of wire harness connector

(to Back-up Light Switch Assembly)

(c) Reconnect the back-up light switch assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

7.

CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RECEIVER ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY)

(a) Disconnect the R31 radio and display receiver assembly connector.

(b) Disconnect the B1 back-up light switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

R31-2 (REV) - B1-1

Always

Below 1 Ω

R31-2 (REV) - Body ground

Always

10 kΩ or higher

Result

Result

Proceed to

NG

A

OK (for R156F)

B

OK (for RC62F)

C

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

(e) Reconnect the back-up light switch assembly connector.

A

REPAIR OR REPLACE HARNESS OR CONNECTOR

C

REPLACE BACK-UP LIGHT SWITCH ASSEMBLY

8.

INSPECT NAVIGATION RECEIVER ASSEMBLY (REVERSE SIGNAL)

(a) Disconnect the navigation receiver assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

N25-2 (REV) - Body ground

Ignition switch ON,

shift lever in not R

Below 1 V

Ignition switch ON,

shift lever in R

11 to 14 V

Text in Illustration

*a

Rear view of wire harness connector

(to Navigation Receiver Assembly)

(c) Reconnect the navigation receiver assembly connector.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

9.

SYSTEM CHECK

(a) Check the vehicle specifications.

Result

Result

Proceed to

for Automatic Transmission

A

for Manual Transmission

B

B

GO TO STEP 12

A

10.

INSPECT PARK/NEUTRAL POSITION SWITCH (IG SIGNAL)

(a) Disconnect the park/neutral position switch connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

P1-2 (RB) - Body ground

Ignition switch ON

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Park/Neutral Position Switch)

(c) Reconnect the park/neutral position switch connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

11.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - PARK/NEUTRALPOSITION SWITCH)

(a) Disconnect the N25 navigation receiver assembly connector.

(b) Disconnect the P1 park/neutral position switch connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N25-2 (REV) - P1-1 (RL)

Always

Below 1 Ω

N25-2 (REV) - Body ground

Always

10 kΩ or higher

Result

Result

Proceed to

NG

A

OK (for AC60F)

B

OK (for AC60E)

C

(d) Reconnect the navigation receiver assembly connector.

(e) Reconnect the park/neutral position switch connector.

A

REPAIR OR REPLACE HARNESS OR CONNECTOR

B

REPLACE PARK/NEUTRAL POSITION SWITCH

C

REPLACE PARK/NEUTRAL POSITION SWITCH

12.

INSPECT BACK-UP LIGHT SWITCH ASSEMBLY (IG SIGNAL)

(a) Disconnect the back-up light switch assembly connector.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

B1-2 - Body ground

Ignition switch ON

11 to 14 V

Text in Illustration

*A

for 2GR-FKS

*B

for 2TR-FE

*a

Front view of wire harness connector

(to Back-up Light Switch Assembly)

(c) Reconnect the back-up light switch assembly connector.

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

13.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - BACK-UP LIGHT SWITCH ASSEMBLY)

(a) Disconnect the N25 navigation receiver assembly connector.

(b) Disconnect the B1 back-up light switch assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

N25-2 (REV) - B1-1

Always

Below 1 Ω

N25-2 (REV) - Body ground

Always

10 kΩ or higher

Result

Proceed to

OK

NG

(d) Reconnect the navigation receiver assembly connector.

(e) Reconnect the back-up light switch assembly connector.

OK

REPLACE BACK-UP LIGHT SWITCH ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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