6L45/6L50/6L80/6L90 - Automatic Transmission

DTC P0601, P0603, P0604, or P062F

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 Instructions provides an overview of each diagnostic category.

DTC Descriptors

Note:
DTCs P0601, P0603, P0604 or P062F could set in other control modules. Verify the DTCs are set in the transmission control module (TCM).

DTC P0601

-
Control Module Read Only Memory (ROM)

DTC P0603

-
Control Module Long Term Memory Reset

DTC P0604

-
Control Module Random Access Memory (RAM)

DTC P062F

-
Control Module Long Term Memory Performance

Circuit/System Description

This is an internal fault detection of the control solenoid valve assembly. This fault is carried out inside the control solenoid valve assembly and no external circuits are involved.

Conditions for Running the DTC

* DTCs P0601, P0603, P0604, or P062F are not set.

* Ignition voltage is 8.6 volts or greater.

Conditions for Setting the DTC

P0601

The read only memory (ROM) test has failed 5 or more times.

P0603

The TCM has detected a memory checksum error.

P0604

The TCM random access memory (RAM) test has failed 5 or more times.

P062F

The TCM has detected non-volatile memory is incorrect during power-down.

Action Taken When the DTC Sets

* DTCs P0601, P0603, P0604, and P062F are Type A DTCs.

* The TCM shifts to a default gear, shuts down, and turns OFF.

Conditions for Clearing the DTC

DTCs P0601, P0603, P0604, and P062F are Type A DTCs.

Reference Information

Description and Operation

Electronic Component Description Electronic Component Description

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Verification

1. Ignition OFF for one minute.

2. Ignition ON, verify with a scan tool that DTCs P0601, P0603, P0604, or P062F are not set.

• If DTCs P0601, P0603, P0604, or P062F are set

Replace the control solenoid valve and transmission control module assembly.

• If DTCs P0601, P0603, P0604 or P062F are not set

3. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.

Repair Instructions

* Perform the Reset Transmission Adapts Reset Procedure following all transmission related repairs.

* Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

* Refer to Control Module References Control Module References for Control Solenoid Valve Assembly replacement, programming, and setup.