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DTC P0700

DTC P0700

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 of the diagnostic category.


DTC Descriptor

DTC P0700

Transmission Control Module (TCM) Requested MIL Illumination

Circuit/System Description

This diagnostic trouble code (DTC) indicates that an exhaust-related DTC has been triggered in the transmission's control module (TCM). The engine control module switches on the warning lamp for malfunction (MIL) when the TCM sends a data message via the serial data circuit with a request to switch on the MIL. The DTC information for the ECM only shows DTC P0700, but freeze frame/failure records data show the operating conditions that applied for the engine when the transmission DTC was set. Freeze frame/failure records data are available from the DTC that was set in the TCM.

Conditions for Running the DTC


• The ignition is ON or the engine is operating.

• DTC P0700 runs continuously.


Conditions for Setting the DTC

The ECM receives a serial data message from the TCM requesting the ECM to turn ON the MIL.

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.

Diagnostic Aids

Communication codes, U-codes, as well as powertrain codes, P-codes, set in the TCM can cause the TCM to request DTC P0700 to be set in the ECM.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification


1.
Note

Correct any other engine control and communication DTCs before diagnosing TCM DTCs.


DTC P0700 is an information dtc. If there are no engine control or communication DTCs, see Diagnostic trouble code list - vehicle for diagnosis of TCM DTCs. Do not replace the control module based on 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 after completing the diagnostic procedure.