Reverse Signal Circuit

AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM (w/ Multi-display without DVD Player): Reverse Signal Circuit; 2013 MY Corolla [07/2012 -]
- Reverse Signal Circuit

DESCRIPTION

for U250E, U341E:

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

for C59, E351:

* The radio and display receiver assembly receives a reverse signal from the back-up light switch assembly.

WIRING DIAGRAM

INSPECTION PROCEDURE

PROCEDURE

1. CHECK HARNESS AND CONNECTOR (REVERSE SIGNAL)

(a) Disconnect the E129 radio and display receiver assembly connector.

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

Standard Voltage:

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

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

A -- PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE Problem Symptoms Table

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

(a) Disconnect the E129 radio and display receiver assembly connector.

(b) Disconnect the B88 park/neutral position switch assembly connector.

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

Standard Resistance:

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY POWER SOURCE)

(a) Disconnect the B88 park/neutral position switch assembly connector.

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

Standard Voltage:

B -- REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (for U250E) Removal

C -- REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY (for U341E) Removal

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR (PARK/NEUTRAL POSITION SWITCH ASSEMBLY - BATTERY)

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

(a) Disconnect the E129 radio and display receiver assembly connector.

(b) Disconnect the B60 back-up light switch assembly connector (for C59).

(c) Disconnect the B5 back-up light switch assembly connector (for E351).

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

Standard Resistance:

for C59

for E351

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

5. CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY POWER SOURCE)

(a) Disconnect the B60 back-up light switch assembly connector (for C59).

(b) Disconnect the B5 back-up light switch assembly connector (for E351).

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

Standard Voltage:

for C59

for E351

(d) Proceed to the next step based on the check result.

Result:

B -- REPLACE BACK-UP LIGHT SWITCH ASSEMBLY (for C59) Removal

C -- REPLACE BACK-UP LIGHT SWITCH ASSEMBLY (for E351) Removal

A -- REPAIR OR REPLACE HARNESS OR CONNECTOR (BACK-UP LIGHT SWITCH ASSEMBLY - BATTERY)