Neon L4-2.0L SOHC (1995)
Powertrain Control Module: Description and Operation
PCM Related Trouble Code Messages
Battery Feed Operation
BATTERY FEED
Circuit A14 from the Power Distribution Center (PDC) supplies battery voltage to cavity 11 of the powertrain control module (PCM). A 20 amp
micro fuse in the PDC protects circuit A14.
Internal Controller Failure
NAME OF CODE:
Internal Controller Failure
WHEN MONITORED:
With the ignition ON.
SET CONDITION:
There is an Eraseable Programable Read Only Memory (EPROM) sum check failure at power down.
THEORY OF OPERATION:
This code indicates the EPROM memory may be corrupt.
POSSIBLE CAUSES:
-
Failed Powertrain Control Module (PCM)
PCM Failure EEPROM Write Denied
NAME OF CODE:
PCM Failure EEPROM Write Denied
WHEN MONITORED:
With the ignition ON, SBEC tries to write to EEPROM memory.
SET CONDITION:
Unsuccessful attempt to write to EEPROM memory.
POSSIBLE CAUSES:
-
PCM failure
-
Busy bus
PCM Failure SPI Communications
NAME OF CODE:
PCM Failure SPI Communications
WHEN MONITORED:
With the ignition ON.
SET CONDITION:
Serial communications inside the controller fail eight times during a run cycle.
THEORY OF OPERATION:
Communications between microprocessors inside the Powertrain Control Module (PCM) are needed to operate the total system. If failure occurs,
the solenoids and relays may not actuate properly.
POSSIBLE CAUSES:
-
PCM failure
PCM Failure SRI Mile Not Stored
NAME OF CODE:
PCM Failure SRI Mile Not Stored
WHEN MONITORED:
With the ignition ON SBEC tries to write service reminder indicator mileage to EEPROM memory.
