P16F8

DTC P16F8

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 Descriptor
DTC P16F8
- Control Module Clutch Command Incorrect

Circuit/System Description

This is an internal fault detection of the transmission control module. This fault is handled inside the transmission control module and no external circuits are involved. The transmission control module is part of the control solenoid valve assembly, and is not serviced separately.

Conditions for Running the DTC

* The control solenoid valve assembly runs the program to detect an internal fault when the key is ON or the engine is running.
* Ignition voltage is 8-18 V.

Conditions for Setting the DTC

The transmission control module has detected an internal malfunction.

Action Taken When the DTC Sets

* DTC P16F8 is a Type A DTC.
* The transmission control module shifts to a default gear and turns OFF.

Conditions for Clearing the DTC

DTC P16F8 is a Type A DTC

Diagnostic Aids

When attempting to set transmission control module internal DTCs, run the engine for at least 1 minute, and then shut the engine OFF for 30 seconds. Following this procedure will allow for a complete transmission control module shutdown. Program the transmission control module with the latest software version and retest the DTC to see if the DTC resets.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (2ML70 - Automatic Transmission)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
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.

Circuit/System Verification

Verify that DTC P16F8 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 (Control Solenoid Valve and Transmission Control Module Assembly Inspection).

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

Control Module References (Control Module References)for Control Solenoid Valve Assembly for replacement, programming and setup.