Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000VJ67
Model Year Start: 2016 Model: Sienna Prod Date Range: [12/2015 - 11/2017]
Title: NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: Steering Pad Switch Circuit; 2016 - 2017 MY Sienna [12/2015 - 11/2017]

Steering Pad Switch Circuit

DESCRIPTION

This circuit sends an operation signal from the steering pad switch assembly to the navigation receiver assembly.

If there is an open in the circuit, the audio system cannot be operated using the steering pad switch assembly.

If there is a short in the circuit, the same condition as when a switch is continuously depressed occurs.

Therefore, the navigation receiver assembly cannot be operated using the steering pad switch assembly, also the navigation receiver assembly itself will not function.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

The vehicle is equipped with a Supplemental Restraint System (SRS) which includes components such as airbags. Before servicing (including removal or installation of parts), be sure to read the precaution for Supplemental Restraint System (See page 2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: PRECAUTION ).

PROCEDURE

1.

INSPECT STEERING PAD SWITCH ASSEMBLY

(a) Remove the steering pad switch assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; AUDIO / VIDEO: STEERING PAD SWITCH: REMOVAL ).

(b) Inspect the steering pad switch assembly (See page 2016 - 2017 MY Sienna [12/2015 - 11/2017]; AUDIO / VIDEO: STEERING PAD SWITCH: INSPECTION ).

NG

REPLACE STEERING PAD SWITCH ASSEMBLY

OK

2.

INSPECT SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

(a) Remove the spiral cable with sensor sub-assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: REMOVAL ).

(b) Inspect the spiral cable with sensor sub-assembly (See page 2016 - 2020 MY Sienna [12/2015 -        ]; SUPPLEMENTAL RESTRAINT SYSTEMS: SPIRAL CABLE: INSPECTION ).

Result

Result

Proceed to

OK (w/o Steering Heater)

A

OK (w/ Steering Heater)

B

NG

C

B

GO TO STEP 4

C

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

A

3.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)

(a) Disconnect the D153 navigation receiver assembly connector.

(b) Disconnect the D21 spiral cable with sensor sub-assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D153-21 (SW1) - D21-6 (AU1)

Always

Below 1 Ω

D153-22 (SW2) - D21-5 (AU2)

Always

Below 1 Ω

D153-23 (SWG) - D21-3 (EAU)

Always

Below 1 Ω

D153-21 (SW1) - Body ground

Always

10 kΩ or higher

D153-22 (SW2) - Body ground

Always

10 kΩ or higher

D153-23 (SWG) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2016 MY Sienna [12/2015 - 08/2016]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE 2017 MY Sienna [08/2016 - 11/2017]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

4.

CHECK HARNESS AND CONNECTOR (NAVIGATION RECEIVER ASSEMBLY - SPIRAL CABLE SUB-ASSEMBLY)

(a) Disconnect the D153 navigation receiver assembly connector.

(b) Disconnect the D149 spiral cable with sensor sub-assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D153-21 (SW1) - D149-6 (AU1)

Always

Below 1 Ω

D153-22 (SW2) - D149-5 (AU2)

Always

Below 1 Ω

D153-23 (SWG) - D149-3 (EAU)

Always

Below 1 Ω

D153-21 (SW1) - Body ground

Always

10 kΩ or higher

D153-22 (SW2) - Body ground

Always

10 kΩ or higher

D153-23 (SWG) - Body ground

Always

10 kΩ or higher

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2016 MY Sienna [12/2015 - 08/2016]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE 2017 MY Sienna [08/2016 - 11/2017]; NAVIGATION / MULTI INFO DISPLAY: NAVIGATION SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR