Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM1000000018WT0
Model Year Start: 2018 Model: Sienna Prod Date Range: [11/2017 -           ]
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: Cruise Main Indicator Light Circuit; 2018 - 2020 MY Sienna [11/2017 -        ]

Cruise Main Indicator Light Circuit

DESCRIPTION

When the cruise control main switch is turned on, the cruise main indicator and "Radar Ready" come on. This indicates the control condition (presence or absence of a vehicle in front, vehicle-to-vehicle distance, and set vehicle speed) and fail-safe state through the CAN communication system. The master warning light and cruise main indicator come on and vehicle-to-vehicle distance information is displayed on the combination meter assembly as the alarm buzzer sounds. Items such as "Dynamic Radar Cruise Sensor Needs Cleaning", "Dynamic Radar Cruise Not Available" and "Check Cruise Control System" are displayed on the multi-information display on the combination meter assembly when the ECM detects signals from each sensor and actuator and sends them to the combination meter assembly via CAN.

HINT:

If the vehicle in front in the same lane significantly decreases vehicle speed or another vehicle moves in front of your vehicle, adequate deceleration cannot be applied and the vehicle-to-vehicle distance will shorten. At this time, the system sounds the buzzer to warn the driver. Each indicator in the dynamic radar cruise control uses CAN for communication. Therefore, if there are any malfunctions in this circuit, check for DTCs in the CAN communication system before troubleshooting this circuit.

CAUTION / NOTICE / HINT

NOTICE:

  • Before replacing the ECM, refer to Registration.

    w/o Smart Key System: Click here 2016 - 2020 MY Sienna [12/2015 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/o Smart Key System): REGISTRATION

    w/ Smart Key System: Click here 2017 - 2020 MY Sienna [08/2016 -        ]; THEFT DETERRENT / KEYLESS ENTRY: ENGINE IMMOBILISER SYSTEM(w/ Smart Key System): REGISTRATION

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE

1.

PERFORM ACTIVE TEST USING TECHSTREAM (METER DISPLAY1)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Body Electrical / Combination Meter / Active Test.

(e) Check the cruise main indicator by performing the Active Test.

Combination Meter

Tester Display

Measurement Item

Control Range

Diagnostic Note

Meter Display 1

Multi-information display

OFF, 6, 5, 4, 3, 2, 1, 0, All

-

Result:

Result

Proceed to

The multi-information display in the combination meter assembly turns on or off according to the operation of the Active Test.

A

The multi-information display in the combination meter assembly does not turn on or off according to the operation of the Active Test.

B
B

GO TO METER / GAUGE SYSTEM

A

2.

READ VALUE USING TECHSTREAM (CRUISE READY MAIN-CPU, CRUISE READY SUB-CPU, CRUISE INDICATOR)

(a) Enter the following menus: Powertrain / Radar Cruise1 / Data List.

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

Powertrain > Radar Cruise1 > Data List

Tester Display

Measurement Item/Range

Normal Condition

Diagnostic Note

Cruise Ready Main-CPU

Cruise control system standby condition/ON or OFF

Each time cruise control main switch (ON/OFF button) is pushed, ON or OFF changes

-

Cruise Ready Sub-CPU

Cruise control system standby condition/ON or OFF

Each time cruise control main switch (ON/OFF button) is pushed, ON or OFF changes

-

Cruise Indicator

Cruise control indicator status/ON or OFF

ON: Cruise control indicator illuminates

OFF: Cruise control indicator turns off

-

Result:

Result

Proceed to

The cruise control indicator illuminates and turns off according to the operation of the cruise control main switch (ON/OFF button).

A

The cruise control indicator does not illuminate but the Data List item Cruise Indicator changes according to the operation of the cruise control main switch (ON/OFF button).

B

The cruise control indicator does not illuminate and the Data List item Cruise Indicator does not change according to the operation of the cruise control main switch (ON/OFF button).

C
A

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

B

REPLACE COMBINATION METER ASSEMBLY

C

REPLACE ECM