| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001AOQM |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - 08/2021] |
| Title: PRE-COLLISION: PRE-COLLISION SYSTEM (for Gasoline Model): U0100,U0125,U0126,U0129,U0155; Lost Communication with ECM / PCM "A"; 2019 - 2021 MY Avalon [04/2018 - 08/2021] | ||
|
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 |
U0155 |
Lost Communication with Instrument Panel Cluster (IPC) Control Module |
DESCRIPTION
The driving support ECU assembly uses the millimeter wave radar sensor assembly to detect objects in front of the vehicle. Based on signals from the millimeter wave radar sensor assembly, the driving support ECU assembly sends pre-collision system control operation signals. These DTCs are stored when a communication malfunction occurs between ECUs that perform pre-collision system control.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
|---|---|---|---|
|
U0100 |
Lost Communication with ECM / PCM "A" |
When the vehicle is being driven at a speed of 5 km/h (4 mph) or more, a communication error between the ECM and the driving support ECU assembly is detected for approximately 5 seconds. |
CAN communication system |
|
U0125 |
Lost Communication with Yaw Rate Sensor Module |
When the engine switch is on (IG), a communication error between the yaw rate sensor (airbag ECU assembly) and the driving support ECU assembly is detected for approximately 1 second. |
CAN communication system |
|
U0126 |
Lost Communication with Steering Angle Sensor Module |
When the engine switch is on (IG), a communication error between the steering sensor and the driving support ECU assembly is detected for approximately 4 seconds. |
CAN communication system |
|
U0129 |
Lost Communication with Brake System Control Module |
When the engine switch is on (IG), a communication error between the skid control ECU (brake actuator assembly) and the driving support ECU assembly is detected for approximately 3 seconds. |
CAN communication system |
|
U0155 |
Lost Communication with Instrument Panel Cluster (IPC) Control Module |
When the engine switch is on (IG), a communication error between the combination meter assembly and the driving support ECU assembly is detected for approximately 3 seconds. |
CAN communication system |
PROCEDURE
|
1. |
CHECK FOR DTCs |
(a) Clear the DTCs.
Body Electrical > Pre-Collision 2 > Clear DTCs
(b) Make sure that the DTC detection conditions are met.
HINT:
If the detection conditions are not met, the system cannot detect the malfunction.
(c) Check for DTCs.
Body Electrical > Pre-Collision 2 > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC U0100, U0125, U0126, U0129 and U0155 are not output |
A |
|
DTC U0100, U0125, U0126, U0129 or U0155 is output |
B |
| A |
|
| B |
|
|
|