DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610
Diagnostic Instructions
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. |
| • | 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 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, 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 ECM ground circuits do not have an open circuit or high resistance. |
| • | The ECM power circuits do not have an open circuit, short to ground, or high resistance. |
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
- Observe the DTC information with a scan tool. DTC P0601, P0602, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 should not set.
- 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
- Clear the DTC information with a scan tool. Observe the scan tool DTC information. Verify that DTC P0602 is not set.
| ⇒ | If DTC P0602 resets, replace the K20 ECM. |
- Observe the DTC information with a scan tool. Verify DTC P0601, P0603, P0604, P0606, P0607, P060D, P062F, or P2610 does not set.
| ⇒ | If a DTC failed this ignition, replace the K20 ECM. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM replacement, programming and setup
| © Copyright Chevrolet. All rights reserved |
