|
DTC Advanced Diagnostics: U0101-00
DTC U0101-00: CAN Communication Failure with TCM
NOTE
|
|
Initial Diagnosis:
The initial on-board diagnosis occurs right after the vehicle condition is turned to the ON mode, and the ABS/VSA indicator comes on, and continues until the indicator goes off. |
|
|
Regular Diagnosis:
The regular on-board diagnosis begins right after the ABS/VSA indicator goes off, and it continues until the vehicle condition is turned to the OFF (LOCK) mode. |
|
|
Review "How to troubleshoot the VSA system" before doing the DTC troubleshooting procedure. |
|
|
Test-drive the vehicle according to local traffic conditions and regulations. Do not test-drive on a lift unless specified. |
|
|
The possible causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes. |
|
Confirmation Procedure |
Basic Condition:
|
|
12 volt battery voltage 9.6 - 16.5 V |
With the Driving Pattern:
|
1. |
Start the engine. |
|
2. |
Test-drive the vehicle at 6 mph (10 km/h) or more. | |
|
Execution |
Regular Diagnosis |
|
Duration |
About 1 second |
|
DTC Type |
|
|
1 drive cycle |
|
|
Brake system indicator (amber) on |
|
|
VSA indicator on (Dependant upon the conditions) | |
|
Fail Safe Action |
|
|
Stop hill start assist function (Dependant upon the conditions) |
|
|
Stop automatic brake hold function (Dependant upon the conditions) |
|
|
Stop automatic operating function (Drive away assist) |
|
|
Stop ignition OFF apply function | |
|
Possible Cause |
|
|
Open or Poor connection between the VSA modulator-control unit and the PCM (F-CAN lines)*1 |
|
|
Open or Poor connection between the VSA modulator-control unit and the TCM (F-CAN lines)*2 |
|
|
PCM internal failure |
|
|
TCM internal failure*2 |
|
|
VSA modulator-control unit internal failure | | |
|
| | 
