Test Description

The number below refers to the step number on the diagnostic table.

3: If the TCM has DTCs set that are requesting MIL illumination, those DTCs must be diagnosed first.

DTC P0700: Transmission Control Module (TCM) Requested MIL Illumination

Step	Action	Values	Yes	No
Schematic References: Automatic Transmission Controls Schematics in Automatic Transmission Connector End View Reference: Engine Control Module (ECM) Connector End Views or Engine Controls Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	-	Go to Step 2	Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2	Observe the Freeze Frame/Failure Records data for this DTC. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running in the DTC or as close to the Freeze Frame/Failure Records data that you observed. Does the DTC fail this ignition?	-	Go to Step 3	Go to Intermittent Conditions
3	Connect a scan tool. Are there any transmission DTCs set?	-	Go to Step 5	Go to Step 4
4	Was an engine control module (ECM) communication condition repaired?	-	Go to Step 7	Go to Step 6
5	Diagnose and repair any transmission DTCs. Refer to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information. Did you complete the action?	-	Go to Step 4	-
6	Replace the ECM. Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement?	-	Go to Step 7	-
7	Clear the DTCs with a scan tool. Turn OFF the ignition for 30 seconds. Start the engine. Operate the vehicle within the Conditions for Running in the DTC as specified in the supporting text. Does the DTC run and pass?	-	Go to Step 8	Go to Step 3
8	Observe the stored information, Capture Info with a scan tool. Does the scan tool display any DTCs that you have not diagnosed?	-	Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information	System OK