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 Descriptor
DTC P15F2: Engine Torque Command CircuitCircuit/System Description
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). The hybrid powertrain control module (HPCM) sends an engine torque requested message to the ECM over GMLAN. The ECM monitors the data to verify that the indicated engine torque requested calculation is correct. The ECM processor monitors the data to verify that the engine torque command is correct.
Conditions for Running the DTC
| • | The control module runs the program to detect an internal fault when the key is ON. |
| • | Ignition voltage is 8-18 volts. |
| • | DTC U1817 is not set. |
Conditions for Setting the DTC
The control module has detected an internal malfunction.
Action Taken When the DTC Sets
| • | DTC P15F2 is a Type A DTC. |
| • | The HPCM commands the battery energy control module (BECM) to open the high voltage contactor relays. |
Conditions for Clearing the DTC
DTC P15F2 is a Type A DTC.
Reference Information
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Circuit/System Verification
- Clear the DTC information.
- Turn the ignition OFF for 1 minute.
- Turn the ignition ON.
- Retest for DTC P15F2.
Circuit/System Testing
Important: Diagnose and repair any communication DTCs prior to performing this testing.
Program the engine control module (ECM) with the latest software version and recheck for DTCs.
| ⇒ | If the DTC resets after programming or if the ECM already contains the latest software version, replace the ECM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM replacement, setup, and programming.
