P06AC

DTC P06AC, P06AD, or P06AE

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 Descriptor
DTC P06AC
- Control Module Power Up Temperature Sensor Performance

DTC P06AD
- Control Module Power Up Temperature Sensor Circuit Low Voltage

DTC P06AE
- Control Module Power Up Temperature Sensor Circuit High Voltage

Circuit/System Description

The transmission control module (TCM) power up temperature sensor is located within the transmission control module. The transmission control module is located within the control solenoid valve assembly and is not serviced separately. The transmission control module power up temperature sensor provides the transmission control module temperature at power up. This temperature reading is used in various shifting and diagnostic routines in the transmission control module software.

Conditions for Running the DTC

* The engine is running for greater than or equal to 60 seconds.
* Vehicle speed is less than 201 km/h (124 mph).

P06AC
* DTC P0712, P0713, P0721, P0722, P0723, P0658, P0668, P0669, P06AD, P06AE, or P215C is not set.
* The TCM power up temperature is at least -39°C (-38°F) and no more than +149°C (+300°F).
* The vehicle is not in Park or Neutral.
* No engine torque or accelerator position sensor faults.

P06AD
* DTC P0721, P0722, P0723 or P215C is not set.
* The transmission output shaft speed is greater than 200 RPM for greater than 200 seconds.
* Estimated drive motor power loss is greater than or equal to 0.4 kW for 200 seconds.

P06AE

DTC P06AE has not failed this ignition cycle.

Conditions for Setting the DTC

P06AC - Condition 1
* Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
* The TCM power up temperature is at least -40°C (-58°F) and no more than +21°C (+70°F).
* The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
* The transmission fluid temperature is greater than 70°C (158°F).
* The transmission fluid temperature has increased by 55°C (99°F) since startup.

P06AC - Condition 2
* Vehicle speed is greater than 8 km/h (5 mph) for 300 seconds cumulative.
* The TCM temperature sensor is between 120-150°C (248-302°F).
* The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
* The transmission fluid temperature is greater than 70°C (158°F).
* The transmission fluid temperature has increased by 55°C (99°F) since startup.

P06AC - Condition 3

The TCM power up temperature changes by greater than 20°C (36°F) 14 times over 7 seconds.

P06AD

The TCM power up temperature is less than or equal to -61°C (-77°F) for greater than 10 seconds.

P06AE

The TCM power up temperature is greater than or equal to 161°C (321°F) for greater than 10 seconds.

Action Taken When the DTC Sets

DTCs P06AC, P06AD and P06AE are Type B DTCs.

Conditions for Clearing the DTC

DTCs P06AC, P06AD and P06AE are Type B DTCs.

Diagnostic Aids

This DTC may be set due to an overheating condition. The system is operating normally when the Transmission Fluid Temperature parameter is within 10°C (18°F) of the TCM Power Up Temperature parameter.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics Electrical Diagrams
Connector End View Reference

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

Electronic Component Description Electronic Component Description
Electrical Information Reference

* Circuit Testing 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 Programming and Relearning for scan tool information

Circuit/System Verification

Verify that DTC P06AC, P06AD, or P06AE 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 Programming and Relearning for Control Solenoid Valve Assembly and Transmission Control Module Assembly replacement, programming, and setup.
* Perform the Reset Transmission Adapts Programming and Relearning following all transmission related repairs.