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Makes 🢒 Oldsmobile 🢒 1997 🢒 Cutlass Supreme 🢒 Engine 🢒 Engine Controls - 3.1L 🢒 Powertrain Control Module Replacement/Programming

Powertrain Control Module Replacement/Programming PCM Replacement

Service of the PCM should normally consist of either replacement of the PCM or EEPROM programming. If the diagnostic procedures call for PCM Replacement, check the PCM first to see if it is the correct part. If the PCM is faulty, remove it and install the new service PCM.

The new service PCM will not be programmed. You must program the new PCM. DTC P0602 indicates the EEPROM is not programmed or has malfunctioned.

Notice: In order to prevent possible electrostatic discharge damage to the PCM, do not touch the connector pins or soldered components on the circuit board.

Notice: Turn the ignition OFF when installing or removing the PCM connectors and disconnecting or reconnecting the power to the PCM (battery cable, PCM pigtail, PCM fuse, jumper cables, etc.) in order to prevent internal PCM damage.

Important: When replacing the production PCM with a service PCM (controller), it is important to transfer the broadcast code and production PCM number to the service PCM label. Do not record on PCM cover. This will allow positive identification of PCM parts throughout the service life of the vehicle.

Removal Procedure

    Object Number: 16128 Size: SH
  1. Disconnect the negative battery cable.
  2. Remove the housing cover and the PCM from the housing assembly.
  3. Disconnect the harness connectors from the PCM.
  4. Remove the PCM from the engine compartment.
  5. If the PCM is being replaced, remove the KS module for installation in the new PCM.

Installation Procedure

    Object Number: 16128 Size: SH
  1. If a new PCM is being installed, install the KS module from the original PCM.
  2. Install the connectors to the PCM.
  3. Install the PCM into the vehicle.
  4. Install the PCM housing cover
  5. Connect the negative battery cable.
  6. If a new PCM is being installed, program the EEPROM.

EEPROM Programming
  1. Set-up - Ensure that the following conditions have been met:
    2. • The battery is fully charged.
    • The ignition is ON.
    • The Techline equipment cable connection at the DLC is secure.
  2. Program the PCM using the latest software matching the vehicle. Refer to up-to-date Techline equipment user's instructions.
  3. If the PCM fails to program, proceed as follows:
    4. • Ensure that all PCM connections are OK.
    • Check the Techline equipment for the latest software version.
    • Attempt to program the PCM. If the PCM still cannot be programmed properly, replace the PCM. You must program the replacement PCM.

Functional Check
  1. Perform the On-Board Diagnostic System Check.
  2. Start the engine and the engine run for one minute.
  3. Use the scan tool in order to scan for the DTCs.
  4. If DTC P0325 sets, the KS module is not fully seated, is missing, or is malfunctioning.

Powertrain Control Module Replacement/Programming CKP Variation Learn Procedure

Crankshaft Position System Variation Learn Procedure

The crankshaft position system variation compensating values are stored in the PCM non-volatile memory after a learn procedure has been performed. If the actual crankshaft position system variation is not within the crankshaft position system variation compensating values stored in the PCM, DTC P0300 may set (refer to Diagnostic Aids for DTC P0300).

The Crankshaft Position System Variation Learn Procedure should be performed if any of the following conditions are true:

    • DTC P1336 is set.
    • The PCM has been replaced.
    • The engine has been replaced.
    • The crankshaft has been replaced.
    • The crankshaft harmonic balancer has been replaced.
    • The crankshaft position sensor has been replaced.

Important: The scan tool crankshaft position system variation learn function will be inhibited if engine coolant temperature is less than 70° C (158° F). Allow the engine to warm to at least 70° C (158° F) before attempting the crankshaft position system variation learn procedure.

The scan tool crankshaft position system variation learn function will be inhibited if any powertrain DTCs other than DTC P1336 are set before or during the crankshaft position system variation learn procedure. Diagnose and repair any DTCs if set.

The crankshaft position system variation learn function will be inhibited if the PCM detects a malfunction involving the camshaft position signal circuit, the 3X reference circuit, or the 18X reference circuit.

   •  If the scan tool indicates a problem with the Cam signal, refer to DTC P0341 Camshaft Position (CMP) Sensor Performance .
   • If the scan tool indicates a problem with the 3X crank signal, refer to DTC P1374 Crankshaft Position (CKP) High to Low Resolution Frequency Correlation .
   •  If the scan tool indicates a problem with the 18X crank signal, refer to DTC P0336 Crankshaft Position (CKP) Sensor Performance .

  1. Set the parking brake.
  2. Start the engine and allow engine coolant temperature to reach at least 70° C (158° F).
  3. Turn OFF the ignition switch.
  4. Select the crankshaft position variation learn procedure from the scan tool special functions list.
  5. Follow the instructions displayed on the scan tool. If the procedure is terminated, refer to Important above for instructions.
  6. Observe DTC status for DTC P1336.
  7. If the scan tool indicates that DTC P1336 ran and passed, the crankshaft position system variation learn procedure is complete. If the scan tool indicates DTC P1336 failed or not run, check for other DTCs. If no DTCs other than P1336 are set, repeat the crankshaft position system variation learn procedure as necessary.