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
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Transmission Control Module (TCM) Power Up Temperature Sensor Performance
DTC P06AD
-
Transmission Control Module (TCM) Power Up Temperature Sensor Circuit Low Voltage
DTC P06AE
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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
* No other ECM or TCM DTCs are set.
* The engine speed is 400 RPM or greater for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
* Brake torque is not active
* Throttle position is valid
P06AD
* DTCs P06AD, P0716, P0717, P0722, or P0723 are not set.
* The engine speed is 400 RPM or greater for 5 seconds.
* The ignition voltage is 8.6 volts or greater.
P06AE
* The engine speed is 400 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
* 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 the 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 Fuel Pump and Level Sensor Assembly
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 Control Module References 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
Replace the Q8 control solenoid valve assembly.
• If the TCM Power-Up Temperature is within the specified value
3. After performing the above steps, then 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. If the vehicle passes the Circuit/System Verification procedure then, 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.
* Control Module References Control Module References for control solenoid valve assembly replacement, programming, and setup.