REMOVAL
| CAUTION | When removing ABM from HCU, be sure to completely separate the two components (approximately 38 mm (1.5 in.) before removing ABM. Otherwise, damage to the pressure sensor or Pump Motor connection may result requiring HCU replacement. Do not to touch the sensor terminals on the HCU side or the contact pads on the ABM side as this may result in contamination and issues in the future. |
Note. If the ABM needs to be replaced, the rear axle type and tire revolutions per mile must be programed into the new ABM. For axle type refer to DIFFERENTIAL AND DRIVELINE . For tire revolutions per mile. Refer to Tires and Wheels/Tires - Specifications . To program the ABM refer to the appropriate Diagnostic Service Information.
Scheme 46
Scheme 47
- Disconnect the pump electrical connector (3) from the HCU (2).
- Remove the module mounting screws (1).
- Remove the module (1) from the HCU (2).
INSTALLATION
| CAUTION | When removing ABM from HCU, be sure to completely separate the two components (approximately 38 mm (1.5 in.) before removing ABM. Otherwise, damage to the pressure sensor or Pump Motor connection may result requiring HCU replacement. Do not to touch the sensor terminals on the HCU side or the contact pads on the ABM side as this may result in contamination and issues in the future. |
Note. If the ABM needs to be replaced, the rear axle type and tire revolutions per mile must be programed into the new ABM. For axle type refer to DIFFERENTIAL AND DRIVELINE . For tire revolutions per mile. Refer to Tires and Wheels/Tires - Specifications . To program the ABM refer to the appropriate Diagnostic Service Information.
- Position the module (1) on the HCU (2).
- Install the mounting screws (1) and tighten to 6 N.m (53 in. lbs).
- Install the pump electrical connector (3) to the module (4).
- Connect the scan tool and initialize the ABM by performing the ABS Verification Test. Refer to «DTC-Based Diagnostics/MODULE, Antilock Brake (ABS) - Standard Procedure»(ref-352635-S25485935042010010600000) .
Scheme 48
The Front Control Module (FCM) (2) is a micro controller based module located in the left front corner of the engine compartment. The FCM mates to the Power Distribution Center (PDC) (1) to form the Integrated Power Module (IPM). The IPM connects directly to the battery and provides the primary means of circuit protection and power distribution for all vehicle electrical systems. The front control module controls power to some of these vehicle systems electrical and electromechanical loads based on inputs received from hard wired switch inputs and data received on the Controller Area Network (CAN) bus circuit.
- Connect the Power Distribution Center (PDC) (3) to the Front Control Module (FCM) by lining up the electrical connector and pushing the two together.
- Install the four fasteners (2) securing the FCM (1) to the IPM (3).
- Install the Integrated Power Module (IPM). Refer to «Electrical - Wiring/Power Distribution/MODULE, Integrated Power (IPM) - Installation»(ref-352650-S31638069892010010600000) .
- Connect the battery negative cable.
Scheme 49
The PCM (1) is attached to the right-inner corner of the engine compartment.
SECTION 2 - ADDITIONAL PCM / TCM REPLACEMENT PROCEDURES
Find the PCM/TCM Type for the vehicle, read and write down the steps, and then go to the step by step instructions for additional information on how to perform these procedures. STEP-BY-STEP INSTRUCTIONS
If a NGC3 or NGC4 PCM was replaced, perform the following additional steps and/or routines
- PCM Replaced - if WCM equipped
- Learn ETC - if ETC equipped
- Check PCM Odometer
- Check PCM VIN - if NOT WCM equipped
- Quicklearn - if EATX equipped
If a GPEC PCM was replaced, perform the following additional steps and/or routines
- If the vehicle is equipped with a CVT, ensure that the TCM has the latest software calibration available (if the vehicle is not equipped with a CVT, skip to Step 3).
- PCM Replaced - if WCM equipped
- Learn ETC
- Check PCM Odometer
- Check PCM VIN - if NOT WCM equipped
- TCM Quicklearn - if EATX equipped
If a CVT TCM was replaced, perform the following additional steps and/or routines
- Initialize CVT
If an EGS TCM was replaced, perform the following additional steps and/or routines
- Initialize EGS
| CAUTION | Certain ABS systems rely on having the Powertrain Control Module (PCM) broadcast the Vehicle Identification Number (VIN) over the bus network. To prevent problems of DTCs and other items related to the VIN broadcast, it is recommend that you disconnect the ABS CAB (controller) temporarily when replacing the PCM. Once the PCM is replaced, write the VIN to the PCM using a diagnostic scan tool. This is done from the engine main menu. Arrow over to the second diagram to "1. Miscellaneous". Select "Check VIN" from the choices. Make sure it has the correct VIN entered before continuing. When the VIN is complete, turn off the ignition key and reconnect the ABS module connector. This will prevent the setting of DTCs and other items associated with the lack of a VIN detected when you turn the key ON after replacing the PCM. |
| CAUTION | Use a diagnostic scan tool to reprogram the new PCM with the vehicles original identification number (VIN) and the vehicles original mileage. If this step is not done, a Diagnostic Trouble Code (DTC) may be set. |
The PCM (1) is attached to the right-inner corner of the engine compartment.
To avoid possible voltage spike damage to the PCM, ignition key must be off, and negative battery cable must be disconnected before unplugging PCM connectors.
Scheme 50
- Disconnect and isolate the negative battery cable.
- Carefully unplug the four 38-way connectors (2) from PCM.
- Remove three PCM mounting bolts (2), and position ground strap (4). Remove PCM from vehicle.
| CAUTION | Certain ABS systems rely on having the Powertrain Control Module (PCM) broadcast the Vehicle Identification Number (VIN) over the bus network. To prevent problems of DTCs and other items related to the VIN broadcast, it is recommend that you disconnect the ABS CAB (controller) temporarily when replacing the PCM. Once the PCM is replaced, write the VIN to the PCM using a diagnostic scan tool. This is done from the engine main menu. Arrow over to the second diagram to "1. Miscellaneous". Select "Check VIN" from the choices. Make sure it has the correct VIN entered before continuing. When the VIN is complete, turn off the ignition key and reconnect the ABS module connector. This will prevent the setting of DTCs and other items associated with the lack of a VIN detected when you turn the key ON after replacing the PCM. |
| CAUTION | Use a diagnostic scan tool to reprogram the new PCM with the vehicles original identification number (VIN) and the vehicles original mileage. If this step is not done, a Diagnostic Trouble Code (DTC) may be set. |
- Position PCM (3) to vehicle.
- Install three PCM mounting bolts (2).
- Tighten bolts to 3-5 N.m (30-40 in. lbs.).
- Be sure ground strap (4) is secured both at bottom of PCM, and at inner-fender.
- Check pin connectors in the PCM. Also check the four 38-way connectors (2) for corrosion or damage. Repair as necessary.
- Install the four 38-way connectors (2) to PCM.
- Connect negative battery cable.
- Use the diagnostic scan tool to reprogram new PCM with vehicles original Identification Number (VIN) and original vehicle mileage. If this step is not done, a Diagnostic Trouble Code (DTC) may be set.