4ET50 - Automatic Transmission

DTC P0601-P0606, P060B, P062F, P16F3, P16F7, P16F8, or P179B

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructionsprovides 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

DTC P16F3
- Control Module Redundant Memory Performance

DTC P16F7
- Control Module Pressure Control Solenoid Command Incorrect

DTC P16F8
- Control Module Clutch Command Incorrect

DTC P179B
- Range State Command Circuit

Circuit/System Description

This is an internal fault detection of the transmission control module (TCM). The transmission control module is part of the control solenoid valve assembly, and is not serviced separately. This fault is handled inside the transmission control module and no external circuits are involved.

Conditions for Running the DTC

The system voltage is 9.5-18V.

Conditions for Setting the DTC

The transmission control module has detected an internal malfunction.

Action Taken When the DTC Sets

* DTCs P0601, P0602, P0603, P0604, P0606, P060B, P062F, P16F3, P16F7, P16F8, and P179B are Type A DTCs.
* The TCM shifts to a default mode and turns OFF.

Conditions for Clearing the DTC

DTCs P0601, P0602, P0603, P0604, P0606, P060B, P062F, P16F3, P16F7, P16F8, and P179B are Type A DTCs.

Diagnostic Aids

When attempting to set transmission control module internal DTCs, vehicle ON for at least 1 minute, and then vehicle OFF for 30 seconds. Following this procedure will allow for a complete transmission control module shutdown.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics
Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation

Electronic Component Description Electronic Component Description
Electrical Information Reference

* Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference

Control Module References Control Module Referencesfor scan tool information

Circuit/System Verification

Verify that DTC P0601, P0602, P0603, P0604, P0606, P060B, P062F, P16F3, P16F7, P16F8 or P179B is not set.

If the DTC is set, program the Q8 Control Solenoid Valve Assembly. If the DTC resets, replace the Q8 Control Solenoid Valve Assembly.

Component Testing

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.

Repair Instructions

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

Control Module References Control Module Referencesfor Control Solenoid Valve Assembly and Transmission Control Module Assembly replacement, programming, and setup.