Powertrain Control Module (Pcm) Diagnosis (DTC P0603, P1633, P1639): Notes
DTC P0603, P1633, P1639 DETECTION CONDITION AND POSSIBLE CAUSES
| DTC P0603, P1633, P1639 |
POWERTRAIN CONTROL MODULE (PCM) MALFUNCTION |
| DETECTION CONDITION |
- P0603 indicates that the PCM has experienced a power interrupt in the keep alive power (KAPWR) circuit or an internal memory test failure. However there are external items that can cause the DTC.
- P1633 indicates that the KAPWR circuit has experienced a power interrupt.
- P1639 indicates the vehicle ID (VID) block is not programmed or the information within is corrupt.
|
| POSSIBLE CAUSE |
- Battery terminal corrosion or loose connections (P0603)
- Open KAPWR circuit (P1633)
- KAPWR to PCM interrupt/open (P0603)
- Damaged PCM (P0603, P1633)
- Reprogramming (P0603)
- Intermittent KAPWR circuit (P1633)
- New powertrain control module (PCM) (P1639)
- Incorrect PCM (P1639)
- Incorrect VID configuration (P1639)
|
| HINT |
PCM Description
- Receives information from a variety of sensors and switch inputs. Based on the strategy and calibration stored within the memory chip, the PCM generates the appropriate output. The system is designated to minimize emissions and optimize fuel economy and driveability.
- The software strategy:
- Controls the basic operation of the engine and transmission.
- Provides the OBD-II strategy.
- Controls the malfunction indicator lamp (MIL).
- Communicates to the IDS or equivalent tester via the data link connector (DLC).
- Allows for flash electronically erasable programmable read only memory (FEEPROM).
- Provides idle air and fuel trim.
- Controls failure mode effects management (FMEM).
|