| Last Modified: 04-05-2023 | 6.11:8.1.0 | Doc ID: RM1000000018WQS |
| Model Year Start: 2018 | Model: Sienna | Prod Date Range: [11/2017 - ] |
| Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE; 2018 - 2020 MY Sienna [11/2017 - ] | ||
PROBLEM SYMPTOMS TABLE
NOTICE:
-
Before replacing the ECM, refer to Registration.
Click here
![2017 - 2020 MY Sienna [08/2016 - ]; 2GR-FKS (ENGINE CONTROL): SFI SYSTEM: REGISTRATION](/t3Portal/stylegraphics/info.gif)
- When replacing the driving support ECU assembly, always replace it with a new one. If a driving support ECU assembly which was installed to another vehicle is used, the information stored in the driving support ECU assembly will not match the information from the vehicle. As a result, a DTC may be stored.
-
When the millimeter wave radar sensor assembly is replaced with a new one, adjustment of the radar sensor beam axis must be performed.
Click here
- When replacing the forward recognition camera, always replace it with a new one. If a forward recognition camera which was installed to another vehicle is used, the information stored in the forward recognition camera will not match the information from the vehicle. As a result, a DTC may be stored.
-
If the forward recognition camera has been replaced with a new one, be sure to perform Recognition Camera/Target Position Memory and Recognition Camera Axis Adjust.
Click here
HINT:
- Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
- Inspect the fuses and relays related to this system before inspecting the suspected areas below.
Dynamic Radar Cruise Control System
|
Symptom |
Suspected Area |
Link |
|---|---|---|
|
The dynamic radar cruise control system cannot be turned on using the cruise control main switch (ON-OFF button) |
CAN communication system |
|
|
Cruise control switch circuit |
|
|
|
Cruise main indicator light circuit |
|
|
|
Combination meter assembly |
|
|
|
Driving support ECU assembly |
|
|
|
ECM |
|
|
|
The dynamic radar cruise control mode cannot be changed between vehicle-to-vehicle distance control mode and constant speed control mode |
CAN communication system |
|
|
Cruise control switch circuit |
|
|
|
Combination meter assembly |
|
|
|
ECM |
|
|
|
The vehicle-to-vehicle distance cannot be changed |
CAN communication system |
|
|
Distance control switch circuit |
|
|
|
Combination meter assembly |
|
|
|
Driving support ECU assembly |
|
|
|
Vehicle speed setting cannot be performed (in constant speed control mode) |
Fail-safe chart |
|
|
CAN communication system |
|
|
|
Cruise control switch circuit |
|
|
|
Stop light switch circuit |
|
|
|
Automatic transaxle system (for UA80E) |
|
|
|
Automatic transaxle system (for UA80F) |
|
|
|
Vehicle stability control system |
|
|
|
ECM |
|
|
|
Vehicle speed setting cannot be performed (in vehicle-to-vehicle distance control mode) |
Fail-safe chart |
|
|
Forward recognition camera is temporarily unavailable |
|
|
|
Millimeter wave radar sensor is dirty |
|
|
|
Millimeter wave radar sensor assembly beam axis not adjusted |
|
|
|
CAN communication system |
|
|
|
Cruise control switch circuit |
|
|
|
Automatic transaxle system (for UA80E) |
|
|
|
Automatic transaxle system (for UA80F) |
|
|
|
Millimeter wave radar sensor assembly |
|
|
|
Forward recognition camera |
|
|
|
Vehicle stability control system |
|
|
|
Combination meter assembly |
|
|
|
Driving support ECU assembly |
|
|
|
ECM |
|
|
|
Control of vehicle speed by the dynamic radar cruise control system is canceled (in constant speed control mode) |
Fail-safe chart |
|
|
CAN communication system |
|
|
|
Cruise control switch circuit |
|
|
|
Stop light switch circuit |
|
|
|
Automatic transaxle system (for UA80E) |
|
|
|
Automatic transaxle system (for UA80F) |
|
|
|
Vehicle stability control system |
|
|
|
ECM |
|
|
|
Control of vehicle speed by the dynamic radar cruise control system is canceled (in vehicle-to-vehicle distance control mode) |
Fail-safe chart |
|
|
Forward recognition camera is temporarily unavailable |
|
|
|
Millimeter wave radar sensor is dirty |
|
|
|
Millimeter wave radar sensor assembly beam axis not adjusted |
|
|
|
CAN communication system |
|
|
|
Cruise control switch circuit |
|
|
|
Automatic transaxle system (for UA80E) |
|
|
|
Automatic transaxle system (for UA80F) |
|
|
|
Millimeter wave radar sensor assembly |
|
|
|
Forward recognition camera |
|
|
|
Vehicle stability control system |
|
|
|
Combination meter assembly |
|
|
|
Driving support ECU assembly |
|
|
|
ECM |
|
|
|
Hunting/vehicle speed is not constant (in constant speed control mode) |
CAN communication system |
|
|
Vehicle stability control system |
|
|
|
ECM |
|
|
|
Hunting/vehicle speed is not constant (in vehicle-to-vehicle distance control mode) |
Millimeter wave radar sensor assembly is dirty |
|
|
Millimeter wave radar sensor assembly beam axis not adjusted |
|
|
|
CAN communication system |
|
|
|
Vehicle stability control system |
|
|
|
Driving support ECU assembly |
|
|
|
ECM |
|
|
|
Pulling the cruise control main switch to CANCEL does not cancel control of vehicle speed by the dynamic radar cruise control system |
Cruise control switch circuit |
|
|
ECM |
|
|
|
Moving the shift lever does not cancel control of vehicle speed by the dynamic radar cruise control system |
Park/neutral position switch (for UA80E) |
|
|
Park/neutral position switch (for UA80F) |
|
|
|
Transmission floor shift assembly (for UA80E) |
|
|
|
Transmission floor shift assembly (for UA80F) |
|
|
|
Automatic transaxle system (for UA80E) |
|
|
|
Automatic transaxle system (for UA80F) |
|
|
|
ECM |
|
|
|
Depressing the brake pedal does not cancel control of vehicle speed by the dynamic radar cruise control system |
Stop light switch circuit |
|
|
ECM |
|
|
|
Even though the millimeter wave radar sensor is not dirty, the warning message "Clean Sensor" is displayed |
Millimeter wave radar sensor assembly |
|
|
The vehicle approach warning buzzer does not sound |
Skid control buzzer circuit |
|
|
Check millimeter wave radar sensor assembly installation position |
|
|
|
Check installation of forward recognition camera |
|
|
|
Forward recognition camera |
|
|
|
Millimeter wave radar sensor assembly |
|
|
|
Driving support ECU assembly |
|
|
|
Even though the vehicle approach warning buzzer is sounding, brake control is not performed when decelerating |
Vehicle stability control system |
|
|
CAN communication system |
|
|
|
Driving support ECU assembly |
|
|
|
ECM |
|
|
|
Even though the SET function is operating, the cruise SET indicator does not illuminate |
CAN communication system |
|
|
Cruise SET indicator light circuit |
|
|
|
Combination meter assembly |
|
|
|
ECM |
|
|
|
The cruise control indicator remains illuminated |
CAN communication system |
|
|
Cruise main indicator light circuit |
|
|
|
Combination meter assembly |
|
|
|
ECM |
|
|
|
Indicators are not illuminated on the multi-information display in the combination meter assembly |
CAN communication system |
|
|
Combination meter assembly |
|
|
|
ECM |
|
|
|
The buzzer does not sound when control of vehicle speed by the dynamic radar cruise control is canceled |
CAN communication system |
|
|
Combination meter assembly |
|
|
|
ECM |
|
|
|