To the top of the document
Orlando
   
GMDE Start Page Load static TOC Load dynamic TOC Help?

DTC P06AC, P06AD, or 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: Transmission Control Module Power Up Temperature Sensor Performance

DTC P06AD: Transmission Control Module Power Up Temperature Sensor Circuit Low Voltage

DTC P06AE: Transmission Control Module Power Up Temperature Sensor Circuit High Voltage

Diagnostic Fault Information

Circuit

Short to Ground

Open/High Resistance

Short to Voltage

Signal Performance

TCM Temperature Sensor

P06AD

P06AE

P06AE

P06AC

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 in the TCM software. 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 throttle position signal is valid.
    • The engine speed is 400 RPM or greater for 5 seconds.
    • The ignition voltage is 9.0 volts or greater.
    • The engine torque 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 9.0 volts or greater.

P06AE

    • The engine speed is 400 RPM or greater for 5 seconds.
    • The ignition voltage is 9.0 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 power up temperature and TCM substrate 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 -254°C (-425°F) or less for 1 minute.

P06AE

The TCM power up temperature is 254°C (489°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.

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 stabilise.

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

    •  Component Connector End Views
    •  Inline Harness Connector End Views

Electrical Information Reference

    •  Circuit Testing
    •  Connector Repairs
    •  Testing for Intermittent Conditions and Poor Connections
    •  Wiring Repairs

Description and Operation

    •  Transmission General Description
    •  Transmission Component and System Description
    •  Electronic Component Description

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 the DTC resets, replace the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement .
  2. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. 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, refer to Testing for Intermittent Conditions and Poor Connections .

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

       Note: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

    • Refer to Control Module References for control solenoid valve assembly replacement, set-up, and programming.
    • Perform the Transmission Adaptive Values Learn following all transmission related repairs.
   


© Copyright Chevrolet. All rights reserved
   


© Copyright Chevrolet. All rights reserved