Toyota Yaris: Vehicle Stability Control System / Control Module Communication Bus "B" Off Bus Off (U007488,U010087,U010187,U012587,U012687,U015187)
DESCRIPTION
The skid control ECU (brake actuator assembly) receives signals from the ECM, steering sensor and airbag sensor assembly via CAN communication.
DTC No. | Detection Item | DTC Detection Condition | Trouble Area | DTC Output from |
U007488 | Control Module Communication Bus "B" Off Bus Off | Any of the following is detected: -
A bus OFF state occurs once or more within 0.1 seconds, 10 times in succession.
-
When the +BS terminal voltage is between 9.5 and 17.4 V, a delay in receiving data from the yaw rate and acceleration sensor (airbag sensor assembly) and steering sensor continues for 1 second or more.
-
When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds:
-
A delay in receiving data from the yaw rate and acceleration sensor (airbag sensor assembly) and steering sensor occurs once or more within 5 seconds.
| CAN communication system | Brake |
U010087 | 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. | -
CAN communication system
-
ECM
-
Skid control ECU (brake actuator assembly)
| Brake |
U010187 | 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 ECM for 2 seconds or more. | -
CAN communication system
-
ECM
-
Skid control ECU (brake actuator assembly)
| Brake |
U012587 | Lost Communication with Multi-axis Acceleration Sensor Module Missing Message | Either of the following is detected: -
When the +BS terminal voltage is between 9.5 and 17.4 V, data from the acceleration sensor cannot be received for 1 second or more.
-
When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds:
-
Data from the acceleration sensor cannot be received once or more within 5 seconds.
| -
CAN communication system
-
Acceleration sensor (airbag sensor assembly)
-
Skid control ECU (brake actuator assembly)
| Brake |
U012687 | Lost Communication with Steering Angle Sensor Module Missing Message | Either of the following is detected: -
When the +BS terminal voltage is between 9.5 and 17.4 V, data from the steering sensor cannot be received for 1 second or more.
-
When the +BS terminal voltage is between 9.5 and 17.4 V, the following occurs 10 times in succession within 60 seconds:
-
Data from the steering sensor cannot be received once or more within 5 seconds
| -
CAN communication system
-
Steering sensor
-
Skid control ECU (brake actuator assembly)
| Brake |
U015187 | Lost Communication with Restraints Control Module Missing Message | When the +BS terminal voltage is between 9.5 and 17.4 V and the vehicle speed exceeds 7 km/h (4 mph), data cannot be received from the airbag sensor assembly for 5 seconds or more. | -
CAN communication system
-
Airbag sensor assembly
-
Skid control ECU (brake actuator assembly)
| Brake |
PROCEDURE
(a) Operate the GTS to clear the codes.
Chassis > Brake > Clear DTCs
(b) Press the DTC clear button.
(c) Turn the ignition switch off.
NEXT |
| |
(a) Operate the GTS to read the DTCs.
Chassis > Brake > Trouble Codes
Result | Proceed to |
Any CAN communication system relating DTCs are output | A |
None of the above conditions are met | B |
HINT:
If the CAN communication system DTC and the relevant sensor DTCs are output simultaneously, troubleshoot the relevant sensor DTCs (for VSC system) after the CAN communication system returns to normal.
Click here
A |
| INSPECT CAN COMMUNICATION SYSTEM |
B |
| USE SIMULATION METHOD TO CHECK |
DESCRIPTION The skid control ECU (brake actuator assembly) detects the brake operating conditions through a signal transmitted by the stop light switch...
DESCRIPTION This procedure is for troubleshooting when the ABS warning light remains on but no DTCs are output. The skid control ECU (brake actuator assembly) controls the ABS warning light in the combination meter assembly via CAN communication...
Other information:
INSTALLATION CAUTION / NOTICE / HINT HINT:
Use the same procedure for the RH side and LH side.
The following procedure is for the LH side.
PROCEDURE 1. INSTALL FOG LIGHT ASSEMBLY (a) Install the fog light assembly with 3 screws. 2. INSTALL FRONT BUMPER ASSEMBLY Click here
3...
DESCRIPTION If a malfunction is detected in the power supply circuit, the skid control ECU (brake actuator assembly) stores this DTC and the fail-safe function prohibits ABS operation. This DTC is stored when the +BS terminal voltage meets one of the DTC detection conditions due to a malfunction in the power supply or charging circuit such as the auxiliary battery or alternator circuit, etc...
Categories
If a key is left in the vehicle, the functions of the key left in the vehicle
are temporarily suspended to prevent theft of the vehicle.
To restore the functions, press the unlock button on the functions-suspended
key in the vehicle.
read more