VIN 6

DTC P0601, P0602, P0606, P060B, P061C, P062C, 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)provide an overview of each diagnostic category.

DTC Descriptors
DTC P0602
- Control Module Not Programmed

DTC P0606
- Control Module Internal Performance

DTC P060B
- Control Module Analog to Digital Performance

DTC P061C
- Control Module Engine Speed Performance

DTC P062C
- Control Module Vehicle Speed Performance

DTC P062F
- Control Module Long Term Memory Performance

DTC P2610
- Control Module Ignition Off Timer Performance

Description

These DTCs apply to internal microprocessor integrity conditions within the engine control module (ECM). 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.

Conditions for Running the DTC

P0602
* The ignition switch is ON.
* The controller is identified as a service replacement ECM.
* DTC P0602 runs continuously when the above conditions are met.

P0606
* The ignition switch is in Run or Crank.
* The power take-off (PTO) is inactive.
* The cruise control is inactive.
* DTC P0606 runs continuously when the above conditions are met.

P060B
* The engine speed is more than 650 RPM.
* The ECM is powered up.
* DTC P060B runs continuously when the above conditions are met.

P061C
* The ignition is ON.
* The engine speed is less than 1,300 RPM.
* DTC P061C runs continuously when the above conditions are met.

P062C, P2610

These DTCs run continuously when the ignition is ON.

P062F

DTC P062F runs once per ignition cycle at power-up.

Conditions for Setting the DTC

The ECM detects an internal failure or incomplete programming.

Action Taken When the DTC Sets

* DTCs P0602, P0606, P060B, P061C, P062C and P062F are Type A DTCs.
* DTC P2610 is a Type B DTC.

Conditions for Clearing the MIL/DTC

* DTCs P0602, P0606, P060B, P061C, P062C and P062F are Type A DTCs.
* DTC P2610 is a Type B DTC.

Diagnostic Aids

Verify that the battery cables are clean and tight, and the battery is fully charged. Refer to Battery Inspection/Test (Battery Inspection/Test).

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. DTC P0602, P0606, P060B, P061C, P062C, 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

1. Observe the DTCs with the scan tool.

• If DTC P0602 or P062F is set, attempt to program the K20 ECM before replacing the K20 ECM. Refer to Service Programming System (SPS) (Service Programming System (SPS)).
• If DTC P0606 was set while performing SPS Programming, clear the DTCs and exit the diagnostic.
• If DTC P0606 was set with DTC P0851 or P0852, first go to Diagnostic Trouble Code (DTC) List - Vehicle (Diagnostic Trouble Code (DTC) List - Vehicle).

2. Test the voltage and ground circuits to the control module for the following:

* A short
* An open
* High resistance

Note: DTC P2610 can be set with a loss of battery voltage to the K20 ECM. Disconnecting the K20 ECM with the ignition ON or an intermittent condition in the Battery Positive Voltage circuit at the underhood fuse block will set DTC P2610.

3. If DTC P2610 is set, turn the ignition OFF and then completely disconnect the ECM harness connector from the K20 ECM for approximately 1 min. Reinstall all of the ECM connectors and then clear codes with the scan tool.

• If DTC P2610 resets after code clear, test for an intermittent condition in the Battery Positive Voltage circuit at the underhood fuse block connector X2-D3.

4. 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, setup, and programming