Diagnostic Trouble Code (DTC) Type Definitions V6
The TCM constantly performs self-diagnostic tests on the transmission and its components. When the TCM detects a fault condition in the transmission operating parameters, the TCM sets a DTC to represents that fault condition. The following
are the types of DTCs programmed in the TCM. In addition, DTCs are classified as either Current or History DTC.
| • | Type A--Emission Related DTCs, |
| • | Type B--Emission Related DTCs, and |
| • | Type C--Non-emission Related DTCs. |
| | Important: Depending on the type of DTC set, the TCM may command the check powertrain icon display to display on the instrument clusters multi-function display (MFD) and warn the driver there is a fault in the transmission.
Refer to Section 12C Instruments
for further information on the check powertrain icon.
|
Type A--Emission Related DTCs
The TCM takes the following action when a Type B DTC runs and fails:
| • | On the first time a Type B DTC fails, the TCM takes the following actions: |
| - | Sets a current Type B DTC that represents the fault condition |
| - | Records the operating conditions at the time the fault sets and stores this information in the Failure Records |
| • | On the second consecutive ignition cycle that a Type B DTC fails, the TCM takes the following actions: |
| - | Illuminates the MFD check powertrain icon |
| - | Records the operating condition at the time the diagnostic fails and stores this information in the Freeze Frame/Failure Record |
Conditions for Clearing Type A or Type B DTCs
| • | The current DTC clears when there is no fault condition in the current TCM self-diagnostics. |
| • | If there are no DTCs logged after six consecutive ignition cycles, the TCM deactivated the MFD check powertrain icon. |
| • | Type A or Type B History DTC clears when there is no fault condition after 40 consecutive warm-up cycles. |
| • | Use of Tech 2 to clear DTCs. |
Type C--Non-emission Related DTCs
The TCM takes the following action when a Type C DTC runs and fails:
| • | sets a current Type C DTC that represents the fault condition, |
| • | records the operating conditions at the time the DTC is logged and stores this information in the Failure Record, and |
| • | the MFD may display a message. |
| | Important: The MFD check powertrain icon does not illuminate when a Type C DTC sets.
|
Conditions for Clearing Type C DTCs
| • | The current DTC clears when there is no fault condition in the current TCM self-diagnostics. |
| • | Type C History DTC clears when there is no fault condition after 40 consecutive warm-up cycles. |
| • | Use of Tech 2 to clear DTCs. |
Current DTCs
A DTC is a Current DTC if the fault condition that triggers the DTC is present during the last TCM self-diagnostics.
History DTCs
A DTC is a History DTC if the fault condition that triggers the DTC is not present during the last TCM self-diagnostics.
