Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM1000000018WSM |
Model Year Start: 2018 |
Model: Sienna |
Prod Date Range: [11/2017 -
] |
Title: CRUISE CONTROL: DYNAMIC RADAR CRUISE CONTROL SYSTEM: U0100,U0125,U0126,U0129,U1104; Lost Communication with ECM / PCM "A"; 2018 - 2020 MY Sienna [11/2017 - ] |
DTC
|
U0100
|
Lost Communication with ECM / PCM "A"
|
DTC
|
U0125
|
Lost Communication with Yaw Rate Sensor Module
|
DTC
|
U0126
|
Lost Communication with Steering Angle Sensor Module
|
DTC
|
U0129
|
Lost Communication with Brake System Control Module
|
DTC
|
U1104
|
Lost Communication with Driving Support ECU
|
DESCRIPTION
The ECM and driving support ECU assembly communicates with each sensor and ECU via CAN communication.
If any malfunction is detected in a CAN communication circuit, one or more CAN communication system DTCs are stored.
DTC No.
|
DTC Detection Condition
|
Trouble Area
|
MIL
|
U0100
|
While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the ECM and the driving support ECU assembly is detected for approximately 1 second or more.
|
-
CAN communication system
-
ECM
-
Driving support ECU assembly
|
Does not come on
|
U0125
|
While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the yaw rate and acceleration sensor (airbag sensor assembly) and the driving support ECU assembly is detected for approximately 1 second or more.
|
-
CAN communication system
-
Yaw rate and acceleration sensor (airbag sensor assembly)
-
Driving support ECU assembly
|
Does not come on
|
U0126
|
While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 1 second or more.
|
-
CAN communication system
-
Steering sensor (spiral cable with sensor sub-assembly)
-
Driving support ECU assembly
|
Does not come on
|
U0129
|
While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the skid control ECU (brake actuator assembly) and the driving support ECU assembly is detected for approximately 2.5 seconds or more.
|
-
CAN communication system
-
Skid control ECU (brake actuator assembly)
-
Driving support ECU assembly
|
Does not come on
|
U1104
|
While the vehicle speed is 36 km/h (22 mph) or more and the dynamic radar cruise control system is operating, a communication error between the driving support ECU assembly and the millimeter wave radar sensor assembly is detected for approximately 0.2 seconds or more.
|
-
CAN communication system
-
Millimeter wave radar sensor assembly
-
Driving support ECU assembly
|
Does not come on
|
PROCEDURE
(a) Clear the DTCs.
Click here
(b) Perform the following to make sure that the DTC detection conditions are met.
HINT:
If the following conditions are not met, the system cannot detect the malfunction.
-
Turn the ignition switch to ON.
-
Turn the dynamic radar cruise control system on using the cruise control main switch (ON-OFF button).
-
Drive the vehicle at 36 km/h (22 mph) or more for 3 seconds or more.
(c) Check for DTCs.
Click here
Result
|
Proceed to
|
DTC U0100, U0125, U0126, U0129 and U1104 are not output
|
A
|
DTC U0100, U0125, U0126, U0129 or U1104 is output
|
B
|
|