DTC U2105 Non European Emissions
Conditions for Setting the DTC
The transmission control module (TCM) detects that the BUS OFF signal. This detection is continued for 0.2 seconds.
Action Taken When the DTC Sets
| • | TCM will request the illumination of the hold lamp and store the DTC when the TCM detects a failure on the 1st ignition cycle |
| • | TCM judges the throttle opening is 0 percent for shift point and lock-up point control |
| • | TCM judges the throttle opening is 100 percent for line pressure control |
| • | No lock-up |
| • | No self-learning control |
| • | TCM judges the engine revolution is 0 RPM |
Conditions for Clearing the DTC
| • | The TCM turns off the hold lamp when no further failures are detected on the next ignition cycles. |
| • | The scan tool can clear the DTC from the TCM history. |
| • | The TCM detects the BUS normal signal for 2 seconds continuously. |
Cause for Failure
| • | Wiring harness or connector between engine control module (ECM) and TCM |
| • | ECM |
| • | TCM |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 |
Is the hold lamp ON? | -- | Go to Step 2 | Go to Step 6 |
2 |
Is DTC U2105 displayed? | -- | Go to Step 3 | Go to Step 6 |
3 |
Is the resistance equal to the specified value? | 0 ohms | Go to Step 4 | Go to Step 5 |
4 |
Is the voltage within the specified range? | 11-14 V | Go to Step 5 | Go to Step 7 |
5 | Repair the malfunctioning terminals as necessary. Did you complete the repair? | -- | System OK | -- |
6 | Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis . Did you complete the repair? | -- | System OK | -- |
7 |
Is the DTC set? | -- | Go to Step 8 | Go to Step 9 |
8 | Replace the ECM. Refer to Engine Control Module Replacement in Engine Controls - 1.6L. Did you complete the replacement? | -- | Go to Step 9 | -- |
9 |
Has the last test failed or is the current DTC displayed? | -- | Go to Step 1 | System OK |
DTC U2105 European Emissions
Conditions for Setting the DTC
The transmission control module (TCM) detects that the BUS OFF signal. This detection is continued for 0.2 seconds.
Action Taken When the DTC Sets
| • | TCM will request the illumination of the malfunction indicator lamp (MIL) and store the DTC when the TCM detects a failure on the 1st ignition cycle |
| • | TCM judges the throttle opening is 0 percent for shift point and lock-up point control |
| • | TCM judges the throttle opening is 100 percent for line pressure control |
| • | No lock-up |
| • | No self-learning control |
| • | TCM judges the engine revolution is 0 RPM |
Conditions for Clearing the DTC
| • | The TCM turns off the MIL when no further failures are detected on the next ignition cycles. |
| • | The scan tool can clear the DTC from the TCM history. |
| • | The TCM detects the BUS normal signal for 2 seconds continuously. |
Cause for Failure
| • | Wiring harness or connector between engine control module (ECM) and TCM |
| • | ECM |
| • | TCM |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 |
Is the malfunction indicator lamp (MIL) ON? | -- | Go to Step 2 | Go to Step 6 |
2 |
Is DTC U2105 displayed? | -- | Go to Step 3 | Go to Step 6 |
3 |
Is the resistance equal to the specified value? | 0 ohms | Go to Step 4 | Go to Step 5 |
4 |
Is the voltage within the specified range? | 11-14 V | Go to Step 5 | Go to Step 7 |
5 | Repair the malfunctioning terminals as necessary. Did you complete the repair? | -- | System OK | -- |
6 | Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis . Did you complete the repair? | -- | System OK | -- |
7 |
Is the DTC set? | -- | Go to Step 8 | Go to Step 9 |
8 | Replace the ECM. Refer to Engine Control Module Replacement in Engine Controls - 1.6L. Did you complete the replacement? | -- | Go to Step 9 | -- |
9 |
Has the last test failed or is the current DTC displayed? | -- | Go to Step 1 | System OK |
