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:
DESCRIPTION Detection Item Symptom Trouble Area Center Airbag Sensor Communication Stop Mode Communication stop for "Airbag" is indicated on the "Communication Bus Check" screen of the GTS. Click here
Airbag sensor assembly main line or connector
Power source circuit of airbag sensor assembly
Airbag sensor assembly ground circuit
Airbag sensor assembly
WIRING DIAGRAM
CAUTION / NOTICE / HINT CAUTION: When performing the confirmation driving pattern, obey all speed limits and traffic laws...
DESCRIPTION The No. 1 cooler thermistor is installed to the evaporator in the air conditioner unit to detect the temperature of the cooled air that has passed through the evaporator, which is used to control the air conditioning system. It sends signals to the air conditioning amplifier assembly...
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.
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