Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ43
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 08/2016]
Title: AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: Reverse Signal Circuit; 2016 MY Sienna [12/2015 - 08/2016]

Reverse Signal Circuit

DESCRIPTION

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

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

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

PROCEDURE

1.

CHECK VEHICLE SIGNAL (OPERATION CHECK)

(a) Enter the "Vehicle Signal Check Mode" screen. [Refer to Check Vehicle Signal in Operation Check (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; AUDIO / VIDEO: AUDIO AND VISUAL SYSTEM: OPERATION CHECK )].

(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
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

NG

2.

CHECK RADIO AND DISPLAY RECEIVER ASSEMBLY

(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

D155-2 (REV) - Body ground

Ignition switch ON, shift lever in R

7.5 to 14 V

D155-2 (REV) - Body ground

Ignition switch ON, shift lever not in R

Below 1 V

Text in Illustration

*a

Front view of wire harness connector

(to Radio and Display Receiver Assembly)
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 D155 radio and display receiver assembly connector.

(b) Disconnect the B3 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

D155-2 (REV) - B3-2 (RL)

Always

Below 1 Ω

D155-2 (REV) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

4.

CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)

(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

B3-1 (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)

Result

Result

Proceed to

OK (for U660E)

A

OK (for U660F)

B

NG

C
A

REPLACE PARK/NEUTRAL POSITION SWITCH

B

REPLACE PARK/NEUTRAL POSITION SWITCH

C

REPAIR OR REPLACE HARNESS OR CONNECTOR