Powertrain Management

DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610

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 of the diagnostic category.

DTC Descriptors
DTC P0601
- Control Module Read Only Memory Performance

DTC P0602
- Control Module Not Programmed

DTC P0603
- Control Module Long Term Memory Reset

DTC P0604
- Control Module Random Access Memory Performance

DTC P0606
- Control Module Processor Performance

DTC P0607
- Control Module Performance

DTC P060D
- Control Module Accelerator Pedal (APP) Position System Circuitry Performance

DTC P062F
- Control Module Long Term Memory Performance

DTC P2610
- Control Module Ignition Off Timer Performance

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM) and the throttle actuator control (TAC) system. This diagnostic also addresses if the ECM is not programmed.

The ECM monitors its ability to read and write to the memory. It also monitors a timing function. The ECM and the TAC processors are used to monitor the TAC system data. Both processors monitor the other processors data to verify that the indicated APP calculation is correct. The ECM performs an intrusive test in order to confirm that the APP signals are not shorted together. The ECM accomplishes this by pulling the APP sensor 2 low momentarily and looking for sensor 1 to also be pulled low.

Conditions for Running the DTCs

P0601, P0604
* The ignition switch is in Run or Crank.
* These DTCs run continuously when the above condition is met.

P0602, P0603, P062F
* The ignition switch is in ON.
* These DTCs run once per ignition cycle.

P0606, P0607, P060D
* The ignition switch is in Run or Crank.
* Reduced engine power is not active.
* The system voltage is more than 6 V.
* These DTCs run continuously when the above conditions are met.

P2610
* The intake air temperature is between -40 to +125°C (-40 to +257°F).
* DTC P2610 runs once per ignition cycle.

Conditions for Setting the DTCs

The ECM detects an internal failure or incomplete programming for more than 10 s.

Actions Taken When the DTC Sets

* DTCs P0601, P0602, P0603, P0604, P0606, P060D, and P062F are Type A DTCs.
* DTC P0607 is a Type C DTC.
* DTC P2610 is a Type B DTC.

Conditions for Clearing the MIL/DTC

* DTCs P0601, P0602, P0603, P0604, P0606, P060D, and P062F are Type A DTCs.
* DTC P0607 is a Type C DTC.
* DTC P2610 is a Type B DTC.

Diagnostic Aids

Low voltage or a momentary loss of power or ground to the ECM may cause a DTC to set. Verify the following:

* The battery cables are clean and tight, and the battery is fully charged. Refer to Battery Inspection/Test (Battery Inspection/Test).
* The ECM ground circuits do not have an open or high resistance.
* The ECM power circuits do not have an open, short to ground, or high resistance.

Reference Information
Schematic Reference

Engine Controls Schematics ([1][2]Electrical Diagrams)
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 (Programming and Relearning) for scan tool information

Circuit/System Verification

1. Observe the DTC information with a scan tool. DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 should not set.
2. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Ignition ON, clear the DTC information with a scan tool. Observe the scan tool DTC information. Verify that DTCs P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 do not fail this ignition cycle.

If DTC P0602 failed this ignition, reprogram the K20 ECM. Refer to Control Module References (Programming and Relearning) for K20 ECM replacement, setup, and programming. If DTC P0602 resets, replace the K20 ECM.
If DTC P0601, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 failed this ignition, replace the K20 ECM.

Repair Instructions

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

Control Module References (Programming and Relearning) for ECM replacement, programming and setup