DTC U0073/86: Control Module Communication Bus OFF; DTC U0100/85: Lost Communication with ECM / PCM "A"; DTC U0129/83: Lost Communication with Brake System Control Module: Description
- The 4WD control ECU inputs the signals sent from the ECM and skid control ECU via the CAN communication system.
- When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.
DTC DETECTION CONDITION CHART
| DTC No. |
DTC Detection Condition |
Trouble Area |
| U0073/86 |
- When the following continues for 5 seconds or more:
- Signals from the 4WD control ECU are not received.
- When the following occurs 10 times consecutively:
- A communication malfunction (bus off) occurs one or more times within 0.1 seconds.
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
|
| U0100/85 |
- When both of the following continue for 2 seconds or more:
- The voltage of the IG1 terminal is 10 V or more.
- At a vehicle speed of 60 km/h (38 mph) or more, communication with the ECM cannot be performed.
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
- ECM
|
| U0129/83 |
- When the following continues for 3 seconds or more:
- The voltage of the IG1 terminal is 10 V or more.
- Communication with the skid control ECU cannot be performed.
|
- Wire harness (CANL, CANH circuit)
- 4WD control ECU
- Skid control ECU
|