DTC P06AC, P06AD, or P06AE
Diagnostic Instructions
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
Connector End View Reference
Component Connector End Views
Description and Operation
Electronic Component Description
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References 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 .
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for Control Solenoid Valve Assembly and Transmission Control Module Assembly replacement, programming, and setup.
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