With Powertrain Control Module (PCM)

Prom (MEM-Cal) Unit Installation:

REMOVE OR DISCONNECT
1. Powertrain Control Module (PCM) access cover.

NOTE: DO NOT remove any of the other screws.

PCM Top Cover:

2. PCM access cover.

CAUTION: Replacement Powertrain Control Module (PCM) is supplied without a Memory-Calibration unit Programmable Read Only Memory (PROM) (MEM-CAL) so care should be taken when removing the PROM (MEM-CAL) from the defective PCM as it will be reused in the new PCM.

3. Using two fingers, push both retaining clips back away from the PROM (MEM-CAL) at the same time. Grasp the PROM (MEM-CAL) at both ends and lift straight up out of the PROM (MEM-CAL) socket. Do not remove the cover of the PROM (MEM-CAL). Use of unapproved PROM (MEM-CAL) removal methods will cause damage to the PROM (MEM-CAL) or PROM (MEM-CAL) socket.

Retaining Clips:

INSPECTION
^ For alignment notches of the PROM (MEM-CAL) and carefully set aside. Do not open the PROM (MEM-CAL).

Prom MEM-Cal:

REMOVE OR DISCONNECT
1. New Powertrain Control Module (PCM) from its packaging and check the service number to make sure it is the same as the defective PCM.
2. Access cover.

INSTALL OR CONNECT
1. PROM (MEM-CAL) in PROM (MEM-CAL) socket.

INSPECT
^ Type of clips used on the PROM (MEM-CAL) sockets.

^ There are two types of clips used on the PROM (MEM-CAL) sockets. A solid type is used on the early production models.

Prom MEM-Cal Clips:

NOTE:
^ Press only on the ends of the PROM (MEM-CAL).

^ Small notches in the PROM (MEM-CAL) must be aligned with the small notches in the PROM (MEM-CAL) socket.

Prom MEM-Cal Clips Location:

^ Gently press down on the ends of the PROM (MEM-CAL) until the clips are against the side of the PROM (MEM-CAL). Press inward on the clips until they snap into place. Listen for the click.

CAUTION: Do not press on the ends of the PROM (MEM-CAL) until the clips snap into place because the controller circuit board and/or clips may be damaged.

Retaining Clips:

INSPECT
^ Retaining clip have snapped into place.

INSTALL OR CONNECT
1. Access cover on PCM.
2. PCM to mounting bracket in correct location and perform On-Board Diagnostic(OBD) System Checks to confirm proper installation. Refer to System Diagnosis/Procedures.

FUNCTIONAL CHECK
1. Turn ignition ON.
2. Enter diagnostics.

A. Diagnostic Trouble Code (DTC) 12 should flash four times (if no other DTC[s] are present). This indicates the PROM (MEM-CAL) is installed properly, and the PCM is functioning.
B. If DTC 51 occurs, or if the MIL is "ON" constantly with no DTC(s), the PROM (MEM-CAL) is not fully seated or is defective.

^ If not fully seated, press firmly on the ends of the PROM (MEM-CAL).

^ If it is necessary to remove the PROM (MEM-CAL), follow the previous removal instructions.

NOTE: To prevent possible Electrostatic Discharge damage to the PROM (MEM-CAL), Do Not touch the component leads, and Do Not remove integrated circuit from carrier.