For 1990-2009 cars

### 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 Illumination

### Circuit/System Description

This 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 when the TCM sends a message over the serial data circuit requesting MIL illumination.

### Conditions for Running the DTC

• | Ignition ON.

• | Remain powering for 3 seconds.

• | DTC P0700 runs continuously.

### Conditions for Setting the DTC

An emission related transmission DTC has been set by the TCM.

### Action Taken When the DTC Sets

• | DTC P0700 is a Type A DTC.

• | Do not Illuminate MIL.

### Conditions for Clearing the DTC

DTC P0700 is a Type A DTC.

### Reference Information

#### DTC Type Reference

Diagnostic Trouble Code (DTC) Type Definitions

### Circuit/System Verification

DTCP 0700 is an informational DTC. If there are engine control 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.

### Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.