Engine Control Module: Service and Repair
REMOVAL PROCEDURE
NOTE: Place the ignition switch in the LOCK position when disconnecting or reconnecting the power to the PCM in order to prevent internal PCM damage. Place the ignition switch in the LOCK position when disconnecting or reconnecting the battery cables, the PCM connectors, or the fuses. The ignition switch supplies power to the PCM in all key positions except LOCK.
1. Record the Transaxle Fluid and Engine Oil Life Indexes.
IMPORTANT: The key must be in the LOCK position for a minimum of 30 seconds prior to disconnecting power to the PCM. This is to allow the PCM to store the Transaxle fluid life, transaxle shift adapts and throttle Position Learned value into the EEPROM. Failure to wait the 30 seconds may result in a EEPROM reset and the Transaxle fluid life being reset to 0.
2. Disconnect the negative battery cable.
3. Disconnect the IAT sensor connector.
4. Remove the gusset (brace) from between the LH fender and the radiator core support by removing the 5 attaching bolts.
5. Loosen the Intake Air duct clamp at the MAF sensor.
6. Remove the Intake Air duct/air cleaner assembly.
7. Remove the air cleaner assembly.
Air Inlet Housing:
8. Lift the air inlet assembly (1) onto the radiator core support area by pulling firmly straight up.
Accessing PCM:
9. Open the air inlet housing (4) to gain access to the PCM (2).
10. Loosen the connector attaching bolts.
11. Disconnect both PCM connectors (1 and 5).
^ If installing a replacement PCM the KS module will have to be transferred from the original PCM to the replacement PCM.
^ If installing a replacement PCM the PCM Isolators (3) will have to be transferred to the replacement PCM.
INSTALLATION PROCEDURE
Air Inlet Housing:
If a replacement PCM is being installed it will be necessary to transfer the KS module from the original PCM. Refer to knock Sensor Module Replacement
1. Slide the PCM Isolators (3) on to the PCM (2).
NOTE: Refer to Fastener Notice in Service Precautions.
2. Install the PCM connectors (1 and 5).
Tighten
Tighten the PCM connectors screws to 8 N.m (71 lb in).
3. Place the PCM (2) into the air inlet housing (4).
4. Close and latch the air inlet housing (4).
Air Inlet Housing:
5. Install the air inlet housing (1) by inserting the outboard locating pin into the inside fender alignment hole.
6. Press the air inlet housing (1) firmly down to engage the bottom locating pins.
7. Ensure that the locating pin grommets are present and properly positioned in the bottom of the air cleaner assembly (1).
8. Install the intake air duct/air cleaner assembly (1) onto the air inlet housing (2).
IMPORTANT: An improperly installed air cleaner or a distorted /missing Intake Air Duct may cause a DTC to set. Ensure air cleaner assembly and IA duct is installed correctly and that there are no kinks or folds in the IA Duct or possible debris in the air cleaner assembly or the MAF sensor inlet screen that may distort the air flow.
9. Install the Intake Air duct to the MAF sensor.
Tighten
Tighten the Intake Air duct clamp to 3 N.m (27 lb in).
10. Connect the IAT sensor connector.
11. Install the gusset (brace) between the LH fender and the radiator core support.
Tighten
Tighten the 5 gusset (brace) attaching bolts to 24 N.m (18 lb ft).
12. Connect the negative battery cable.
NOTE: The PCM will be damaged if proper programming procedures are not followed.
13. If a replacement PCM is being installed it must be programmed (flashed) using the latest Techline programming procedures. Testing and Inspection
14. Start the engine. If the engine fails to start verify the following:
^ The PCM contains the correct program
^ The PCM connectors are fully engaged into the PCM.
^ That all fuses are present and not blown.
15. Connect a scan tool and perform the following:
^ Clear DTC P0603.
^ Reset Transaxle fluid life to that recorded prior to PCM removal.
^ Reset Engine oil life to that recorded prior to PCM replacement.