Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZRIY
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: CRUISE CONTROL: CRUISE CONTROL SYSTEM: Cruise Control Switch Circuit; 2017 - 2020 MY Sienna [08/2016 -        ]

Cruise Control Switch Circuit

DESCRIPTION

The cruise control main switch operates 7 functions: SET, - (COAST), TAP-DOWN, RES (RESUME), + (ACCEL), TAP-UP, and CANCEL. The SET, TAP-DOWN, and - (COAST) functions, and the RES (RESUME), TAP-UP, and + (ACCEL) functions are operated with the same switch. The cruise control main switch is an automatic return type switch which turns on only while operating it in the direction of each arrow and turns off after releasing it. The internal contact point of the cruise control main switch is turned on with the switch operation. Then the ECM reads the voltage value that has been changed by the switch operation to control SET, - (COAST), RES (RESUME), + (ACCEL), and CANCEL.

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.

READ VALUE USING TECHSTREAM

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Cruise Control / Data List.

(e) Read the Data List according to the display on the Techstream.

Cruise Control

Tester Display

Measurement Item

Normal Condition

Diagnostic Note

Cancel Switch

CANCEL switch status/

ON or OFF

ON: CANCEL switch on

OFF: CANCEL switch off

-

-SET Switch

-SET switch status/

ON or OFF

ON: -SET switch on

OFF: -SET switch off

-

+RES Switch

+RES switch status/

ON or OFF

ON: +RES switch on

OFF: +RES switch off

-

Cruise Main Switch Operation Condition

Cruise control main switch (ON/OFF button) status/

ON or OFF

ON: Cruise control main switch (ON/OFF button) pushed

OFF: Cruise control main switch (ON/OFF button) not pushed

-

OK:

When the cruise control main switch is operated, the display changes as shown above.

OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2017 MY Sienna [08/2016 - 11/2017]; CRUISE CONTROL: CRUISE CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: CRUISE CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE )

NG

2.

INSPECT CRUISE CONTROL MAIN SWITCH

(a) Remove the cruise control main switch (See page 2016 - 2020 MY Sienna [12/2015 -        ]; CRUISE CONTROL: CRUISE CONTROL MAIN SWITCH: REMOVAL ).

(b) Inspect the cruise control main switch (See page 2016 - 2020 MY Sienna [12/2015 -        ]; CRUISE CONTROL: CRUISE CONTROL MAIN SWITCH: INSPECTION ).

NG

REPLACE CRUISE CONTROL MAIN SWITCH

OK

3.

INSPECT CRUISE CONTROL SWITCH WIRE

(a) Disconnect the cruise control switch wire connector from the spiral cable with sensor sub-assembly and cruise control main switch.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A-4 (CCS) - z3-3 (CCS)

Always

Below 1 Ω

A-1 (ECC) - z3-4 (ECC)

Always

Below 1 Ω

A-4 (CCS) or z3-3 (CCS) - Body Ground

Always

10 kΩ or higher

A-1 (ECC) or z3-4 (ECC) - Body Ground

Always

10 kΩ or higher

Text in Illustration

*a

Front view of wire harness connector

(to Spiral Cable with Sensor Sub-assembly)

*b

Front view of wire harness connector

(to Cruise Control Main Switch)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

4.

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 ).

NG

REPLACE SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY

OK

5.

CHECK HARNESS AND CONNECTOR (SPIRAL CABLE WITH SENSOR SUB-ASSEMBLY - ECM AND BODY GROUND)

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

(b) Disconnect the A69 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D21-1 (CCS) - A69-41 (CCS)

Always

Below 1 Ω

D21-1 (CCS) or A69-41 (CCS) - Body ground

Always

10 kΩ or higher

D21-2 (ECC) - Body ground

Always

Below 1 Ω

OK

REPLACE ECM

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR