| • | 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 provide an overview of each diagnostic category. |
This diagnostic applies to internal microprocessor integrity conditions within the engine control module (ECM).
| • | The ignition is ON, with the engine OFF or the engine is operating. |
| • | The DTCs run once an ignition cycle. |
The ECM detects that the checksum calculation does not match the expected checksum.
The ECM detects an internal condition for more than 3 seconds.
DTCs P0601, P0604, and P0605 are Type B DTCs.
DTCs P0601, P0604, and P0605 are Type B DTCs.
Engine Control Module Description
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Ignition ON, observe the DTC information with a scan tool.
| ⇒ | If DTCs P0601, P0604, or P0605 failed this ignition, replace the ECM. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for ECM, setup, and programming