Diagnostic Instructions
DTC Descriptors
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
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
| • | The ignition switch is in Run or Crank. |
| • | DTC P0601 runs continuously when the above condition is met. |
P0602
| • | The ignition switch is in Run or Crank. |
| • | DTC P0602 runs once per ignition cycle. |
P0603
| • | The ignition switch is in Run or Crank. |
| • | DTC P0603 runs once per ignition cycle. |
P0604
| • | The ignition switch is in Run or Crank. |
| • | DTC P0604 runs continuously when the above condition is met. |
P0606
| • | The ignition switch is in the Unlock/Accessory, Run, or Crank positions. |
| • | The system voltage is more than 5.23V. |
| • | DTC P0606 runs continuously when the above conditions are met. |
P0607
| • | The ignition switch is in Unlock, Accessory, Run or Crank. |
| • | The system voltage is more than 5.23V. |
| • | DTCs P0601, P0602, P0603, P0604, P0606, P062F, P0641, P0651, P2610 are not set |
| • | DTC P0607 runs continuously when the above conditions are met. |
P060D
| • | The ignition switch is in the Unlock, Accessory, Run, or Crank position. |
| • | The system voltage is more than 5.23V. |
| • | DTC P060D runs continuously when the above conditions are met. |
P062F
| • | DTC P062F runs once per ignition cycle. |
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 DTCs
The ECM detects an internal failure or incomplete programming for more 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
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 Testing for the DTC
- Observe the DTCs with the scan tool.
| ⇒ | If DTC P0602 is set, attempt to program the K20 ECM before replacing the K20 ECM. Refer to
Control Module References for K20 ECM replacement, setup, and programming. |
| ⇒ | If DTC P0602 resets, replace the K20 ECM. |
- Test the voltage and ground inputs to the K20 ECM for the following:
| ⇒ | If all circuits test normal, 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
