P06AC

DTC P06AC-P06AE

Diagnostic Instructions

- Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
- Review Strategy Based Diagnosis for an overview of the diagnostic approach.
- 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 (TCM) power up temperature sensor is located inside of the control solenoid valve assembly, which has no serviceable components. 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

- DTC 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, P042E, P0658, P0668, P0669, P06AC, P06AD, P06AE, P0712, P0713, P0716, P0717, P0722, P0723, P0962, P0963, P0966, P0967, P0970, P0971, P215C, P2720, P2721, P2729, or P2730 is not 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.
- The engine torque signal is valid.
- The throttle position signal is valid.

P06AD

- DTC P06AD, P0716, P0717, P0722, or P0723 is 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 is not set.

Conditions for Setting the DTC

P06AC

- 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 difference between the TCM substrate temperature and 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 above conditions have to be met for 5 minutes within a 6 minute period.

P06AD

The TCM power up temperature is -59° C (-74° F) or lower 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

- DTC P06AC, P06AD, P06AE are Type B DTCs.
- The TCM defaults the TCM power up temperature to the TCM substrate temperature.

Conditions for Clearing the DTC

DTC P06AC, P06AD, P06AE are Type B DTCs.

Reference Information

Connector End View Reference

Component Connector End Views

Description and Operation

- Transmission General Description
- Electronic Component Description for control solenoid valve assembly

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

1. Operate the vehicle at 64 km/h (40 mph) for 10 minutes.
2. If DTC P06AC, P06AD, or P06AE resets, replace the Q8 control solenoid valve assembly.
3. After performing the above steps, verify that the DTC does not return by operating the vehicle within the conditions for running fault codes (DTC). You may also operate the vehicle within the conditions you have seen from the freeze frame/failure records. If the vehicle passes the Circuit/System Verification procedure, refer to Testing for Intermittent Conditions and Poor Connections.

Repair Instructions

Note
- Perform the Transmission Adaptive Values Learn following all transmission related repairs Programming and Relearning
- Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection. Control Solenoid Valve and Transmission Control Module Assembly Inspection

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for control solenoid valve assembly replacement, setup, and programming