• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM). This diagnostic also addresses if the ECM is not programmed.
The checksum calculation at power down in the last drive cycle completely finished. DTC P0601 runs once an ignition cycle for 30 seconds.
The ignition is ON, with the engine OFF. DTC P0602 runs continuously when the ignition is ON for greater than 1 second.
The throttle actuator control (TAC) power down calculation in the last drive cycle was completely finished. DTC P0603 runs once an ignition cycle for 5 seconds.
The read/write test at power down in the last drive cycle completely finished. DTC P0604 runs once an ignition cycle for 5 seconds.
The power down calculation in the last drive cycle was completely finished. DTC P0606 runs continuously with ignition ON or engine operating for greater than 5 seconds.
DTC P2610 runs continuously once the engine is operating and the real time clock is active.
The ECM detects the incorrect read only memory (ROM) checksum for greater than 4 seconds.
The ECM detects that programming is incomplete for greater than 4 seconds.
The ECM detects an error during the shut down path test.
The ECM detects random access memory (RAM) errors.
The ECM detects an internal condition for greater than 4 seconds or for a cumulative of 50 seconds.
The ECM detects the engine off timer is not valid for greater than 4 seconds or for a cumulative of 50 seconds.
• | DTCs P0601, P0602, P0603, P0604, and P0606 are Type A DTCs. |
• | DTC P2610 is a Type B DTC. |
• | DTCs P0601, P0602, P0603, P0604, and P0606 are Type A DTCs. |
• | DTC P2610 is a Type B DTC. |
Engine Control Module Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
⇒ | If DTC P0602 failed this ignition, program the ECM. If the DTC resets, replace the ECM. |
⇒ | If DTC P0606 failed this ignition, clear the scan tool DTC information and verify the DTC does not reset. If the DTC resets, replace the ECM. |
Important: A low battery condition can cause DTC P0603 to set. Verify the starting and charging system is in good condition when diagnosing DTC P0603. Refer to Charging System Test.
⇒ | If a DTC failed this ignition, replace the ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for engine control module replacement, setup, and programming