Powertrain Management (ECM)

DTC P0601-P0604, P0606, P062B, P062F, P0630, P16F3, or P262B (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 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 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 P262B
- Control Module Power 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.

Conditions for Running the DTCs

P0601, P0602, P0630

These DTCs run continuously when the ignition is in ON.

P0603, P062F

These DTCs run once per ignition cycle.

P0604

DTC P0604 runs continuously when the ignition is ON for greater than 30 s.

P0606

DTC P0606 runs continuously when Ignition 1 Signal voltage is greater than 11 V.

P16F3

* The engine speed is greater than 500 RPM.

* DTCs P0101, P0102, P0103, P0106, P0107, P0108, P2227, P2228, P2229, or P2230 are not set.

* DTC P16F3 runs continuously when the above conditions are met.

P262B

DTC P262B runs on ECM power down.

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, P062F, P0630, and P16F3 are Type A DTCs.

* DTC P262B is a Type B DTC.

Conditions for Clearing the MIL/DTC

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

* DTC P262B 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 Fuel Pump and Level Sensor Assembly

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

1. Ignition ON, clear the DTC information with a scan tool. Observe the DTC information with a scan tool.

2. Verify that DTC P0641, P0651, P0697, or P06A3 does not set.

• If a DTC is set
Refer to DTC P0641, P0651, P0697, or P06A3 (ECM) Powertrain Management (ECM) for further diagnosis.

• If DTC P0641, P0651, P0697, or P06A3 does not set

3. Observe the DTC information with a scan tool. Verify DTC P0602 or P0630 is not set.

• If DTC P0602 or P0630 is set

1. Program the K20 Engine Control Module. Refer to Control Module References Control Module References.

2. Verify DTC P0602 or P0630 is not set.

• If DTC P0602 or P0630 sets, replace the K20 Engine Control Module.

• If DTC P0602 or P0630 does not set

3. All OK.

• If DTC P0602 or P0630 is not set

4. Verify DTC P0601, P0603, P0604, P0606, P062F, P16F3, or P262B is not set.

• If DTC P0601, P0603, P0604, P0606, P062F, P16F3, or P262B is set
Replace the K20 Engine Control Module.

• If DTC P0601, P0603, P0604, P0606, P062F, P16F3, or P262B is not set

5. All OK.

Repair Instructions

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

Control Module References Control Module References for Engine Control Module replacement, programming and setup