DTC U0100-00; DTC U0101-00; CAN Communication Failure With ECM/ISU, & TCM
NOTE:
- Troubleshoot any PGM-FI DTCs first - Refer to: How to Troubleshoot the Fuel and Emissions SystemsHow to Troubleshoot the CVT System(CVT System) .
- Before you troubleshoot, review the general troubleshooting information .
| DTC Description | DTC | Freeze Frame |
|---|---|---|
| U0100-00 CAN Communication Failure With ECM/ISU | ||
| U0101-00 CAN Communication Failure With TCM |
- 1. DTC check:
1. Turn the vehicle to the ON mode.
2. Clear the DTC with the HDS.
3. Turn the vehicle to the OFF (LOCK) mode, then start the engine.
4. Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
5. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame U0029-00 CAN Communication Failure (Bus OFF) U0100-00 CAN Communication Failure With ECM/ISU U0101-00 CAN Communication Failure With TCM Is DTC U0100-00 or U0101-00 indicated?
YES
If only DTC U0100-00 or U0101-00 are indicated, go to step 2.
YES
If DTC U0029-00 is also indicated, go to DTC U0029-00 .
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting . If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the Freeze data/on-board snapshot.
- 2. Open wire check (F-CAN_H, F-CAN_L lines):
1. Turn the vehicle to the OFF (LOCK) mode.
2. Jump the SCS line with the HDS, and wait more than 1 minute
3. Disconnect the following connectors.
VSA modulator-control unit 38P connector PCM connector A (51P) 4. Check for continuity between test points 1 and 2.
Test condition Vehicle OFF (LOCK) mode VSA modulator-control unit 38P connector: disconnected PCM connector A (51P): disconnected Test circuit 1 Test point 1 VSA modulator-control unit 38P connector No. 38 Test point 2 PCM connector A (51P) No. 2 Test circuit 2 Test point 1 VSA modulator-control unit 38P connector No. 26 Test point 2 PCM connector A (51P) No. 1 Is there continuity?
YES
The F-CAN_H and F-CAN_L wires are OK. Go to step 3.
NO
Repair an open in the wire between the PCM and the VSA modulator-control unit.
- 3. PCM check (update or substitution):
1. Reconnect the following connectors.
VSA modulator-control unit 38P connector PCM connector A (51P) 2. Update the PCM if it does not have the latest software , or substitute a known-good PCM .
3. Clear the DTC with the HDS.
4. Turn the vehicle to the OFF (LOCK) mode, start the engine.
5. Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
6. Check for DTCs with the HDS.
DTC Description DTC Freeze Frame U0100-00 CAN Communication Failure With ECM/ISU U0101-00 CAN Communication Failure With TCM Is DTC U0100-00 or U0101-00 indicated?
YES
Go to step 4.
NO
If the PCM was updated, troubleshooting is complete. If the PCM was substituted, replace the original PCM .
- 4. VSA modulator-control unit check (update):
1. Update the VSA modulator-control unit if it does not have the latest software .
2. Turn the vehicle to the OFF (LOCK) mode, then start the engine.
3. Test-drive the vehicle at 6 mph (10 km/h) or more.
NOTE: Drive the vehicle on the road, not on a lift.
4. Check for DTCs with the HDS.
Is DTC U0100-00 or U0101-00 indicated?
YES
Check for loose terminals and poor connections in the VSA modulator-control unit 38P connector. If the VSA modulator-control unit was updated and the symptom/indication is still present, replace the VSA modulator-control unit .
NO
Troubleshooting is complete. If any other DTCs are indicated, go to the indicated DTCs troubleshooting.