P06AD

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 Descriptors
DTC P06AC
- Transmission Control Module (TCM) Power Up Temperature Sensor Performance

DTC P06AD
- Transmission Control Module (TCM) Power Up Temperature Sensor Circuit Low Voltage

DTC P06AE
- Transmission Control Module (TCM) Power Up Temperature Sensor Circuit High Voltage

Circuit/System Description

The transmission control module (TCM) power up temperature sensor is located inside of the control solenoid valve assembly which has no serviceable parts. The TCM power up temperature sensor provides the temperature of the TCM when the TCM power is on. This temperature reading is used in various shifting and diagnostic routines and also to protect the control solenoid valve assembly and TCM. This fault is handled inside the TCM and no external circuits are involved.

Conditions for Running the DTC

P06AC
* DTCs P06AC, P0716, P0717, P0722, or P0723 are not set.
* The engine speed is 500 RPM or greater for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
* The TCM power up temperature is between -40 and +150°C (-40 and +302°F).

P06AD
* DTCs P06AD, P0716, P0717, P0722, or P0723 are not set.
* The transmission output shaft speed is 200 RPM or greater for 4 minutes.
* The torque converter clutch (TCC) slip speed is 120 RPM or greater for 4 minutes.
* The engine speed is 500 RPM or greater for 5 seconds.
* The ignition voltage is 8.6 volts or greater.

P06AE
* The engine speed is 500 RPM or greater for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
* DTC P06AE has not failed set this ignition.

Conditions for Setting the DTC

P06AC - Condition 1
* Vehicle speed is greater than 8 km/h (5 mph) for 5 minutes.
* TCC slip speed is greater than 150 RPM for 5 minutes.
* The TCM power up temperature is between -40 and +150°C (-40 and +302°F).
* The TCM power up temperature has changed by less than 2°C (3.6°F) in 100 seconds.
* The transmission fluid temperature (TFT) is 70°C (158°F) or greater.
* The TFT has increased by 55°C (99°F) since start-up.

Condition 2
* Vehicle speed is 8 km/h (5 mph) or greater for 300 seconds cumulative.
* TCC slip speed is greater than 120 RPM 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 2 minutes.
* The TFT is 70°C (158°F) or greater.
* The TFT has increased by 55°C (99°F) since start-up.

Condition 3

The TCM power up temperature changes by 20°C (36°F) or greater 5 times over 7 seconds.

P06AD
* The TCM power up temperature is -59°C (-74°F) or less for 13 seconds or greater.
* The TFT is 140°C (284°F) or greater for 60 seconds or more.

P06AE

The TCM power up temperature is 164°C (327°F) or greater for 10 seconds or more.

Action Taken When the DTC Sets

* DTCs P06AC, P06AD, and P06AE are Type C DTCs.
* The TCM allows the vehicle to operate in transmission protection mode.

Conditions for Clearing the DTC

DTCs P06AC, P06AD, and P06AE are Type C DTCs.

Diagnostic Aids

During a road test, the TCM Power-Up temperature should steadily increase to a normal operating temperature, and then stabilize.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (Diagrams)
Connector End View Reference

Component Connector End Views (Connector Views)
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)

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)
Scan Tool Reference

Control Module References (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Ignition ON, clear the DTCs with a scan tool.
2. Operate the vehicle at 64 km/h (40 mph) for 10 minutes. Monitor the TCM Power-Up Temperature parameter and the TCM Temperature parameter with a scan tool. The TCM Power-Up Temperature parameter and the TCM Temperature parameter should be within 10°C (18°F) of each other.

• If the TCM Power-Up Temperature parameter is not within the specified value of the TCM Temperature parameter, then replace the Q8 control solenoid valve assembly.

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Repair Instructions

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

* Control solenoid valve assembly replacement. Refer to Control Module References (Programming and Relearning) for replacement, setup, and programming.
* Perform the Service Fast Learn Adapts (Programming and Relearning) following all transmission related repairs.