P0700

DTC P0700

Diagnostic Instructions

* Perform The Diagnostic System Check - Vehicle Initial Inspection and Diagnostic Overview
* Strategy Based Diagnosis
* Diagnostic Procedure Instructions

DTC Descriptor
DTC P0700
- Transmission Control Module (TCM) Requested MIL Illumination

Circuit/System Description

This diagnostic trouble code (DTC) indicates that an emission related transmission DTC has set in the transmission control module (TCM). The engine control module (ECM) turns ON the malfunction indicator lamp (MIL) when the TCM sends a message over the serial data circuit requesting MIL illumination.

Conditions for Running the DTC

* The ignition is ON.
* DTC P0700 runs continuously.

Conditions for Setting the DTC

Serial Data communication from the TCM indicates a fault exists with the transmission.

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 ECM turns OFF the malfunction indicator lamp (MIL) when it no longer receives a MIL request from the TCM.
* 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.

Circuit/System Verification

DTC P0700 is an informational DTC. If there are Engine Controls DTCs, Diagnose those first. Refer to Diagnostic Trouble Code (DTC) List - Vehicle. For diagnosis of TCM DTCs, Refer to Diagnostic Trouble Code (DTC) List - Vehicle. Diagnostic Trouble Code Descriptions

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests