DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610. Generic Unit Repair 2008

For 1990-2009 cars only

Makes 🢒 Generic 🢒 2008 🢒 Unit Repair 🢒 Engine 🢒 Engine Controls and Fuel - LS Engines 🢒 DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610

Diagnostic Instructions

•	Perform the Powertrain On Board Diagnostic (OBD) System Check prior to using this diagnostic procedure.

•	Review Strategy Based Diagnosis for an overview of the diagnostic approach.

•	Diagnostic Procedure Instructions provide an overview of each diagnostic category.

DTC P0601: Control Module Read Only Memory (ROM)

DTC P0602: Control Module Not Programmed

DTC P0603: Control Module Long Term Memory Reset

DTC P0604: Control Module Random Access Memory (RAM)

DTC P0606: Control Module Internal Performance

DTC P0607: Control Module Performance

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

DTC P062F: Control Module Long Term Memory Performance

DTC P2610: Control Module Ignition Off Timer Performance

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 DTC

P0601 and P0604,

•	The ignition is ON.

•	DTC P0601 runs continuously when the above condition is met.

P0602, P0603, and P062F

•	The ignition is ON.

•	The DTCs run once per ignition cycle.

P0606

•	The ignition is ON.

•	The system voltage is greater than 5.3 volts.

•	DTC P0606 runs continuously when the above conditions are met.

P0607

•	The ignition is ON.

•	The system voltage is greater than 5.3 volts.

•	DTCs P0601, P0602, P0603, P0604, P0606, P062F, P0641, P0651, P2610 are not set

•	DTC P0607 runs continuously when the above conditions are met.

P060D

•	DTC P0606 is not set.

•	The ignition is ON.

•	The system voltage is greater than 5.3 volts.

•	DTC P060D runs continuously when the above conditions are met.

P2610

•	The ECM is powered down.

•	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 DTC

The ECM detects an internal failure or incomplete programming for greater than 10 seconds.

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.

Reference Information

DTC Type Reference

Diagnostic Trouble Code (DTC) Type Definitions

Circuit/System Testing

Ignition ON, clear the DTC information with a scan tool. Observe the scan tool DTC information. Verify that DTCs P0602, or P2610 do not fail this ignition cycle.

⇒	If DTC P0602 failed this ignition, reprogram the ECM. Refer to Engine Control Module Programming and Setup . If DTC P0602 resets, replace the ECM.

Important: An intermittent loss of system voltage during throttle tip-in may set DTC P060D.

Test the voltage and ground inputs to the ECM for the following:

•

A short

•

An open

•	High resistance

⇒	If all circuits test normal, replace the ECM.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Engine Control Module Replacement for ECM replacement, programming and setup