Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
DTC Descriptor
DTC P0700: Transmission Control Module (TCM) Requested MIL IlluminationCircuit/System Description
This DTC indicates the transmission control module (TCM) has set an emission related transmission DTC. The engine control module (ECM) receives the TCM information over the serial data circuit. The ECM illuminates the malfunction indicator lamp (MIL) when the TCM sends a message over the serial data circuit requesting MIL illumination. The DTC information for the ECM will only display DTC P0700, but the freeze frame/failure records data may display the transmission DTC that set.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
The TCM is requesting MIL illumination.
Action Taken When the DTC Sets
DTC P0700 is a Type A DTC.
Conditions for Clearing the MIL/DTC
DTC P0700 is a Type A DTC.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
Important: Correct any Engine Controls DTCs before diagnosing TCM DTCs.
DTC P0700 is an informational DTC. If there are no Engine Controls DTCs, refer to Diagnostic Trouble Code (DTC) List - Vehicle for diagnosis of TCM DTCs.
