DTC P0601-P0607, P061A, P061B, P061C, or P2610
Diagnostic Instructions
DTC Descriptors
DTC P0601 00: Control Module Read Only Memory Performance
DTC P0602 00: Control Module Not Programmed
DTC P0604 00: Control Module Random Access Memory Performance
DTC P0605 00: Control Module Programming Read Only Memory Performance
DTC P0606 00: Control Module Processor Performance
DTC P0607 00: Control Module Performance
DTC P061A 00: Control Module Torque System Circuitry Performance
DTC P061B 00: Control Module Torque Calculation Performance
DTC P061C 00: Control Module Engine Speed System Circuitry Performance
DTC P2610 00: Control Module Ignition off Timer Performance
Circuit/System Description
These 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 accelerator pedal position (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 00, P0605 00
| • | The ignition switch is in run or crank. |
| • | The system voltage is more than 5.23 V. |
| • | The check sum calculation at power down in the last drive cycle had completely finished. |
| • | DTC P0601 00 and DTC P0605 run once per ignition cycle when the above condition is met. |
P0602 00
| • | The ignition switch is in run or crank. |
| • | DTC P0602 00 runs once per ignition cycle. |
P0604 00
| • | The ignition switch is in run or crank. |
| • | The read/write test at power down in the last drive cycle had completely finished. |
| • | DTC P0604 00 runs once per ignition cycle when the above condition is met. |
P0606 00
| • | The ignition switch is in the unlock/accessory, run, or crank positions. |
| • | DTC P0606 00 runs continuously when the above conditions are met. |
P0607 00
| • | The engine is running or cranking. |
| • | DTC P0607 00 runs continuously when the above condition is met.. |
P061B 00
| • | The ignition is ON or the engine is running. |
| • | The system voltage is more than 5.23 V. |
| • | DTC P061B 00 runs continuously when the above conditions are met. |
P061C 00
| • | The ignition is ON or the engine is running. |
| • | The system voltage is more than 5.23 V. |
| • | DTC P061C 00 runs continuously when the above conditions are met. |
P2610 00
| • | The ECM is powered down. |
| • | DTC P2610 00 runs once per ignition cycle. |
| • | The ECM is powered up with the ignition switch in the run or crank position. |
| • | The engine OFF timer value is less than or greater than an internal reference counter during an 2 s interval. |
| • | DTC P2610 00 runs continuously when the above conditions are met. |
Conditions for Setting the DTC
The ECM detects an internal failure or incomplete programming for more than 10 s.
Conditions for Clearing the DTC
| • | DTCs P0601 00, P0602 00, P0604 00, P0605 00, P0606 00, P061A 00, P061B 00 and P061C 00 are Type A DTCs. |
| • | DTC P0607 00 is a Type C DTC. |
| • | DTC P2610 00 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
- Observe the DTCs with the scan tool.
| ⇒ | If DTC P0602 00 is set, attempt to program the K20 Engine Control Module before replacing the K20 Engine Control Module. Refer to Control Module References . |
| ⇒ | If DTC P0602 00 resets, replace the K20 Engine Control Module. |
- Test the K20 Engine Control Module voltage circuits at ECM terminal 21, 50 X1 and terminal 2, 4, 6 X2 and test the ground circuits at ECM terminal 20, 35 X1 and terminal 1, 3, 5 X2 for the following:
| ⇒ | If all circuits test normal, replace the K20 Engine Control Module. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for engine control module replacement, setup and programming
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