Circuit Description
The powertrain control module (PCM) electronically erasable programmable read only memory (EEPROM) contains data which is essential to running the engine and transmission. The PCM continuously checks the integrity of this data.
Conditions for Running the DTC
The ignition is in the crank position or the run position
Conditions for Setting the DTC
The PCM is unable to correctly read data from the flash memory
Action Taken When the DTC Sets
| • | The PCM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. |
| • | The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Freeze Frame and the Failure Records. |
Conditions for Clearing the MIL/DTC
| • | The PCM turns the MIL OFF after 3 consecutive drive trips that the diagnostic runs and does not fail |
| • | A last test failed (current DTC) clears when the diagnostic runs and does not fail |
| • | A History DTC clears after 40 consecutive warm-up cycles, if this or any other emission related diagnostic does not report any failures |
| • | The PCM battery voltage is interrupted |
| • | Use a scan tool in order to clear the MIL/DTC |
Diagnostic Aids
Replace the PCM even if this DTC exists only in history.
For an intermittent, refer to Symptoms .
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Powertrain On-Board Diagnostic (OBD) System Check? | -- | ||
|
Important: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement . Is the action complete? | -- | -- | ||
3 |
Does the scan tool indicate that this test ran and passed? | -- | ||
4 | Select the Capture Info option and the Review Info option using the scan tool. Does the scan tool display any DTCs that you have not diagnosed? | -- | Go to applicable DTC table | System OK |
