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 P0601: Transmission Control Module (TCM) Read Only Memory (ROM)DTC P0602: Transmission Control Module (TCM) Not Programmed
DTC P0603: Transmission Control Module (TCM) Long Term Memory Reset
DTC P0604: Transmission Control Module (TCM) Random Access Memory (RAM)
DTC P0606: Transmission Control Module (TCM) Internal Performance
DTC P060B: Control Module Analog to Digital Performance
DTC P062F: Transmission Control Module (TCM) Long Term Memory Performance
Circuit/System Description
This is an internal fault detection of the transmission control module (TCM). This fault is handled inside the TCM and no external circuits are involved. The TCM is part of the control solenoid (w/body and TCM) valve assembly, and is not serviced separately.
Conditions for Running the DTC
| • | The control solenoid (w/body and TCM) valve assembly runs the program to detect an internal fault when the key is ON or the engine is running. |
| • | Ignition voltage is 8-18 volts. |
Conditions for Setting the DTC
The control solenoid (w/body and TCM) valve assembly has detected an internal malfunction.
Action Taken When the DTC Sets
| • | DTCs P0601, P0602, P0603, P0604, P0606, P060B and P062F are Type A DTCs. |
| • | The TCM shifts to a default gear and turns OFF. |
Conditions for Clearing the DTC
DTCs P0601, P0602, P0603, P0604, P0606, P060B and P062F are Type A DTCs.
Diagnostic Aids
When attempting to set TCM internal DTCs, run the engine for at least 1 minute, and then shut the engine off for 30 seconds. Following this procedure will allow for a complete TCM shutdown.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
- Start the Engine.
- Let the Engine run for 1 minute, then turn the key OFF for 30 seconds.
- Retest for DTCs P0601, P0602, P0603, P0604, P0606, P060B and P062F.
Circuit/System Testing
Program the TCM with the latest software version and recheck for DTCs.
| ⇒ | If the DTC resets, replace the control solenoid (w/body and TCM) valve assembly. |
Component Testing
Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming.
