ECM

DTC P0601-P0604, P0606, P062B, P062F, P0630, P16F3, or P2610 (ECM)

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 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 P062B
- Control Module Fuel Injector Control Performance

DTC P062F
- Control Module Long Term Memory Performance

DTC P0630
- VIN Not Programmed or Mismatched - Engine Control Module (ECM)

DTC P16F3
- Control Module Redundant 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). This diagnostic also addresses if the ECM is not programmed, or is programmed incorrectly.

Conditions for Running the DTC

P0601, P062B, P0630

These DTCs run continuously when the ignition is ON.

P0602, P0603, P062F

These DTCs run at power up.

P0604

DTC P0604 runs continuously when the ignition is ON. First memory scan may take up to 30 s.

P0606
* Reduced engine power is not active.
* Ignition voltage is greater than 6.4 V.
* DTC P0606 runs continuously when the above conditions have been met.

P16F3
* DTCs P0101, P0102, P0103, P0106, P0107, P0108 are not set.
* Engine speed is greater than 750 RPM.
* DTC P16F3 runs continuously when the above conditions have been met.

P2610
* DTCs P0111, P0112, P0113 are not set.
* DTC P2610 runs once per ignition cycle.

Conditions for Setting the DTC

The ECM detects an internal failure or incomplete or incorrect programming.

Action Taken When the DTC Sets

* DTCs P0601, P0602, P0603, P0604, P0606, P062B, P062F, P0630 and P16F3 are Type A DTCs.
* DTC P2610 is a Type B DTC.

Conditions for Clearing the DTC

* DTCs P0601, P0602, P0603, P0604, P0606, P062B, P062F, P0630 and P16F3 are Type A DTCs.
* 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, P062B, P062F, P0630, P16F3, 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.

If DTC P0602 or P0630 failed this ignition, program the K20 ECM. Refer to Control Module References (Programming and Relearning). If the DTC resets, replace the K20 ECM.
If DTC P0601, P0603, P0604, P0606, P062B, P062F, P16F3, 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 engine control module replacement, setup, and programming