Toyota CH-R Service Manual: Reverse Signal Circuit

Toyota CH-R Service Manual / Navigation / Multi Info Display / Navigation System / Reverse Signal Circuit

DESCRIPTION

The radio and display receiver assembly receives a reverse signal from the park/neutral position switch.

WIRING DIAGRAM

PROCEDURE

1.

CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Vehicle Signal in Operation Check (Click here ).

(b) Check that the display changes between ON and OFF according to the shift lever position.

HINT:

This display is updated once per second. As a result, it is normal for the display to lag behind the actual shift lever position.

OK:

Shift Lever Position

Display

R

ON

Except R

OFF
ON

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

OFF

2.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

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

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

F129-28 (REV) - Body ground

Engine switch on (IG), shift lever in R

7.5 to 14 V

F129-28 (REV) - Body ground

Engine switch on (IG), shift lever not in R

Below 1 V
OK

REPLACE RADIO AND DISPLAY RECEIVER ASSEMBLY

NG

3.

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

(a) Disconnect the F129 radio and display receiver assembly connector.

(b) Disconnect the C36 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

F129-28 (REV) - C36-2 (RL)

Always

Below 1 Ω

F129-28 (REV) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
OK

4.

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

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

*a

Front view of wire harness connector

(to Park/neutral Position Switch)

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

C36-1 (RB) - Body ground

Engine switch on (IG)

11 to 14 V
OK

REPLACE PARK/NEUTRAL POSITION SWITCH

NG

REPAIR OR REPLACE HARNESS AND CONNECTOR
    Vehicle Speed Signal Circuit between Navigation ECU and Combination Meter
    DESCRIPTION The navigation ECU receives a vehicle speed signal from the combination meter assembly. HINT: A voltage of 12 V or 5 V is output from each ECU and then input to the combin ...

    Reverse Signal Circuit between Radio Receiver Assembly and Navigation ECU
    DESCRIPTION This circuit includes the navigation ECU and radio and display receiver assembly. WIRING DIAGRAM PROCEDURE 1. CHECK HARNESS AND CONNECTOR (RADIO AND DISPLAY RE ...

    Other materials:

    Toyota CH-R Service Manual > Rain Sensor: Installation
    INSTALLATION PROCEDURE 1. INSTALL RAIN SENSOR TAPE HINT: The rain sensor tape is reusable. Only replace the tape if it is damaged or contaminated with foreign matter. (a) Remove the rain sensor tape. (b) Clean the rain sensor sensing portion with a piece of cloth. (c) Peel off th ...

    Toyota CH-R Service Manual > Vehicle Stability Control System: Brake Hold Standby Indicator Light Circuit
    DESCRIPTION When the brake hold switch (electric parking brake switch assembly) is turned on with the ignition switch turned to ON, the brake hold standby indicator light illuminates when brake hold operation is possible. WIRING DIAGRAM CAUTION / NOTICE / HINT HINT: When replacing the ski ...

    Toyota C-HR (AX20) 2023-2026 Owner's Manual

    Toyota CH-R Owners Manual

    Toyota CH-R Service Manual

    © 2017-2026 Copyright www.tochr.net
    0.0106