Circuit Description
This diagnostic trouble code (DTC) indicates that an emissions related transmission fault has occurred. The transmission control module (TCM) has no direct control of the malfunction indicator lamp (MIL), but if a transmission fault occurs that is emissions related, the MIL must illuminate. The TCM transmits a MIL request signal over the CAN bus to the ECM and the ECM will turn ON the MIL. This allows the MIL to illuminate, even though the fault was detected by the TCM. If a TCM MIL request signal is received by the ECM, P0700 will set.
Conditions for Running the DTC
Tested continuously
Conditions for Setting the DTC
An emission related transmission DTC has been stored by the TCM.
Action Taken When the DTC Sets
| • | The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. |
| • | The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The control module turns OFF the malfunction indicator lamp (MIL) after 6 consecutive ignition cycles that the diagnostic runs and does not fail. |
| • | A current DTC, Last Test Failed, clears when the diagnostic runs and passes. |
| • | A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. |
| • | Clear the MIL and the DTC with a scan tool. |
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check-Engine Controls? | Go to Step 2 | |
2 | Observe the DTC Information with a scan tool. Does the scan tool display any ECM DTCs other than P0700? | Go to Diagnostic System Check - Automatic Transmission in Automatic Transmission 5L40E |
