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 Descriptors
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 power up temperature sensor is located inside of the control solenoid valve assembly which has no serviceable parts. The Transmission Control Module power up temperature sensor provides the temperature of the Transmission Control Module when the Transmission Control Module power is on. This temperature reading is used in various shifting and diagnostic routines and also to protect the control solenoid valve assembly and Transmission Control Module. This fault is handled inside the Transmission Control Module and no external circuits are involved.
Conditions for Running the DTC
P06AC
* TCM DTCs: P0658, P0668, P0669, P06AD, P06AE, P0716, P0712, P0713, P0717, P0722, P0723, P0962, P0963, P0966, P0967, P0970, P0971, P215C, P2720, P2721, P2729, or P2730 is not set.
* ECM DTCs: P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401, or P042E is not set.
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is between 8.6-32 V.
* Brake torque is not active.
* Engine speed is valid.
* Throttle position is valid.
P06AD
* DTC P06AD, P0716, P0717, P0722 or P0723 is not set.
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is between 8.6-32 V.
P06AE
* DTC P06AE is not set.
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is between 8.6-32 V.
Conditions for Setting the DTC
P06AC
* The difference between the TCM substrate temperature and the TCM power up temperature is greater than 8-10°C (14-18°F) depending on the average of the TFT, TCM substrate, and TCM power up temperatures.
* The difference between the transmission fluid temperature (TFT) and TCM power up temperature is greater than 20-50°C (36-90°F), depending on the average of the TFT, TCM substrate, and TCM power up temperatures.
* The above conditions have to be met for 5 minutes.
P06AD
The TCM power up temperature is -59°C (-74°F) or less for 1 minute.
P06AE
The TCM power up temperature is 164°C (327°F) or greater for 1 minute.
Action Taken When the DTC Sets
* DTCs P06AC, P06AD, and P06AE are Type B DTCs.
* The TCM defaults the TCM power up temperature to the TCM substrate temperature with an offset value.
Conditions for Clearing the DTC
DTCs P06AC, P06AD, and P06AE are Type B 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 Electrical Diagrams
Connector End View Reference
* Component Connector End Views A/C Compressor Clutch
* Inline Harness Connector End Views X101
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 Control Module References for scan tool information
Special Tools
DT-47825-10 - Jumper Harness
For equivalent regional tools, refer to Special Tools Tools and Equipment.
Circuit/System Verification
1. Ignition ON, clear the DTCs with a scan tool.
2. Verify the scan tool Transmission Control Module Power-Up Temperature is between -59 and +164°C (-74 and +327°F).
• If the temperature is not between -59 and +164°C (-74 and +327°F)
Replace the Q8 Control Solenoid Valve Assembly.
• If the temperature is between -59 and +164°C (-74 and +327°F)
3. Verify the scan tool Transmission Control Module Power-Up Temperature and the Transmission Control Module Temperature parameters are within 8°C (46°F) after operating the vehicle at 64 km/h (40 mph) for 10 minutes.
• If the Temperatures are not within 8°C (46°F)
Replace the Q8 Control Solenoid Valve Assembly.
• If the Temperatures are within 8°C (46°F)
4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observe from the Freeze Frame/Failure Records data.
5. Verify the DTC does not set.
• If the DTC sets
Replace the Q8 Control Solenoid Valve Assembly.
• If the DTC does not set
6. All OK.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Perform the Reset Transmission Adapts Reset Procedure following all transmission related repairs.
* Refer to Control Module References Control Module References for control solenoid valve assembly replacement, programming, and setup.