P0700

DTC P0700 (LUW)

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.

* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC Descriptor

DTC P0700
- Transmission Control Module Requested MIL Illumination

Circuit/System Description

The transmission control module (TCM) uses the controller area network (CAN) to signal the engine control module (ECM) that the TCM is requesting malfunction indicator lamp (MIL) illumination. This occurs when the TCM determines a condition that affects emissions within the transmission control system. When the ECM receives the message from the TCM, DTC P0700 will set.

Conditions for Running the DTC

The ignition is ON for greater than 3 s.

The DTC runs continuously when the above condition is met.

Conditions for Setting the DTC

The TCM requests the ECM to illuminate the MIL.

Action Taken When the DTC Sets

DTC P0700 is a Type A DTC.

Conditions for Clearing the DTC

DTC P0700 is a Type A DTC.

Diagnostic Aids

Communication codes, U-codes, as well as powertrain codes, P-codes, set in the transmission control module will cause the transmission control module to request DTC P0700 to be set in the ECM.

DTC P0700 cannot be cleared from the ECM until the related TCM codes have been cleared.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

Note: Correct any engine control module (ECM) DTCs before diagnosing TCM DTCs

1. DTC P0700 is an informational DTC. If there are no engine controls or communication DTCs, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle for diagnosis of transmission control module DTCs. Do not replace the ECM for this DTC.

2. Operate the vehicle within the conditions for running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the freeze frame/failure records data.

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.