DTC U0074-88: Control Module Communication Bus "B" Off Bus Off; DTC U0076-88: Control Module Communication Bus "D" Off Bus Off; DTC U0100-87: Lost Communication with ECM/PCM "A" Missing Message; DTC U0101-87: Lost Communication with TCM Missing Message; DTC U0125-87: Lost Communication with Multi-axis Acceleration Sensor Module Missing Message; DTC U0126-87: Lost Communication with Steering Angle Sensor Module Missing Message; DTC U0130-87: Lost Communication with Steering Effort Control Module Missing Message; DTC U0134-87: Lost Communication with Power Steering Control Module Rear Missing Message [09/2020 - ]: Description
The skid control ECU (brake actuator assembly) communicates with the following ECUs and sensors via CAN communication.
- ECM
- Yaw rate and acceleration sensor
- Steering angle sensor
- VGRS ECU (front steering control ECU)*1
- DRS ECU (rear steering control ECU)*2
- *1: w/ VGRS System
- *2: w/ DRS System
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area |
|---|---|---|---|
| U0074-88 | Control Module Communication Bus "B" Off Bus Off | Any of the following is detected:
|
CAN communication system |
| U0076-88 | Control Module Communication Bus "D" Off Bus Off | Any of the following is detected:
|
|
| U0100-87 | Lost Communication with ECM/PCM "A" Missing Message | When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 15 km/h (9 mph), data cannot be received from the ECM for 2 seconds or more. |
|
| U0101-87 | Lost Communication with TCM Missing Message | When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 15 km/h (9 mph), data cannot be received from the TCM (ECM) for 2 seconds or more. |
|
| U0125-87 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message | Either of the following is detected:
|
|
| U0126-87 | Lost Communication with Steering Angle Sensor Module Missing Message | Either of the following is detected:
|
|
| U0130-87 | Lost Communication with Steering Effort Control Module Missing Message | Either of the following is detected:
|
|
| U0134-87 | Lost Communication with Power Steering Control Module Rear Missing Message | Either of the following is detected:
|
|
DTC DETECTION CONDITIONS: U0074-88
| Vehicle Condition | ||||
|---|---|---|---|---|
| Pattern 1 | Pattern 2 | Pattern 3 | ||
| Diagnosis Condition | When the +BS terminal voltage is between 9.5 and 17.4 V | - | ◦ | ◦ |
| Malfunction Status | A bus OFF state occurs once or more | ◦ | - | - |
| A delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor continues | - | ◦ | - | |
| A delay in receiving data from the yaw rate and acceleration sensor and steering angle sensor occurs once or more within 5 seconds | - | - | ◦ | |
| Detection Time | Within 0.1 seconds, 10 times in succession | 1 second or more | 10 times in succession within 60 seconds | |
| Number of Trips | 1 trip | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for any of the patterns in the table above are met.
DTC DETECTION CONDITIONS: U0125-87
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | When the +BS terminal voltage is between 9.5 and 17.4 V | ◦ | ◦ |
| Malfunction Status | Data from the acceleration sensor cannot be received | ◦ | - |
| Data from the acceleration sensor cannot be received once or more within 5 seconds | - | ◦ | |
| Detection Time | 1 second or more | 10 times in succession within 60 seconds | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
DTC DETECTION CONDITIONS: U0126-87
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | When the +BS terminal voltage is between 9.5 and 17.4 V | ◦ | ◦ |
| Malfunction Status | Data from the steering angle sensor cannot be received | ◦ | - |
| Data from the steering angle sensor cannot be received once or more within 5 seconds | - | ◦ | |
| Detection Time | 1 second or more | 10 times in succession within 60 seconds | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
DTC DETECTION CONDITIONS: U0130-87
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | - | - | - |
| Malfunction Status | When the +BS terminal voltage is between 9.5 and 17.4 V, data from the VGRS ECU (front steering control ECU) cannot be received. | ◦ | - |
| When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs: - The condition that data from the VGRS ECU (front steering control ECU) cannot be received occurs once or more within 5 seconds. |
- | ◦ | |
| Detection Time | 1 second or more. | 10 times in succession within 60 seconds. | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.
DTC DETECTION CONDITIONS: U0134-87
| Vehicle Condition | |||
|---|---|---|---|
| Pattern 1 | Pattern 2 | ||
| Diagnosis Condition | - | - | - |
| Malfunction Status | When the +BS terminal voltage is between 9.5 and 17.4 V, data from the DRS ECU (rear steering control ECU) cannot be received. | ◦ | - |
| When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs: - The condition that data from the DRS ECU (rear steering control ECU) cannot be received occurs once or more within 5 seconds. |
- | ◦ | |
| Detection Time | 1 second or more. | 10 times in succession within 60 seconds. | |
| Number of Trips | 1 trip | 1 trip | |
HINT:
DTC will be output when conditions for either of the patterns in the table above are met.