| CAUTION | When certain materials rub together, a transfer of electrons from one material to another may occur under special conditions. This causes electrostatic charge (static electricity) build-up in one of the materials. When any conducting material comes in contact with the charged material, electrostatic discharge occurs, transferring electrons to the third material. Electronic components used in control systems are designed to carry very low voltages; a 30-volt charge created by static electricity can cause a total or degrading failure in PCM or other electronic components containing integrated circuits. Before servicing PCM, ground yourself, and ground the work area to discharge stored electricity. |
| Movement | Relative Humidity 10-20% | Relative Humidity 65-90% |
|---|---|---|
| Walking Across Carpet | 35,000 | 1500 |
| Handling Clear Plastic Bag | 20,000 | 1200 |
| Sliding Across Velour Seat | 15,000 | 400 |
| Walking Across Tile/Vinyl | 12,000 | 50 |
| Handling Vinyl Tote Bag | 7000 | 600 |
STATIC CHARGE
| CAUTION | DO NOT remove PCM from packaging until ready to install. Ground static-proof package BEFORE opening. DO NOT touch electrical terminals of components unless properly grounded. DO NOT lay electrical components on car seat, carpeting or dashboard. Use electrostatic protection mat and ground strap whenever possible. (Scheme 1) |
Servicing PCM While Using 3M Anti-Static Mat. Scheme 1
Note. Before replacing PCM, carefully inspect all wiring and control components. Ensure ignition switch is in OFF position when connecting or disconnecting PCM connector.
Removal
Disconnect negative battery cable. Unplug electrical connectors from PCM. (Scheme 1) Remove PCM from vehicle. Remove PROM and CALPAK (if equipped) or MEM-CAL from PCM. See CALPAK, MEM-CAL, or PROGRAMMABLE READ-ONLY MEMORY (PROM).
Installation
Install PROM and CALPAK (if equipped) or MEM-CAL in NEW PCM. See CALPAK, MEM-CAL, or PROGRAMMABLE READ-ONLY MEMORY (PROM). Install PCM into vehicle. Connect electrical connectors to PCM. Install access panels. Reconnect negative battery cable.
Disconnect negative battery cable. Remove PCM from vehicle. See REMOVAL under CONTROL MODULE . Using 2 fingers, push retaining clips back from MEM-CAL. At the same time, grasp it at both ends and lift out of socket. DO NOT remove MEM-CAL cover.
- Carefully align MEM-CAL pins with PCM pin holes. DO NOT press in middle of MEM-CAL. Push downward evenly on ends of MEM-CAL until retaining clips on ends of MEM-CAL snap into place.
- Install PCM. Reconnect negative battery cable. Turn ignition on and ground DLC terminal "B". DTC 12 should be flashed at least 4 times. If DTC 12 is not flashed at least 4 times, other codes are present. If DTC 51 is present, or if MIL stays on constantly with code(s) present, MEM-CAL is not fully seated, or is defective.
- Remove PCM from vehicle. See REMOVAL under «CONTROL MODULE»(ref-20112-S14621224712001010200000) . Position PCM so bottom cover is facing upward. Remove slide-off PROM access cover by depressing locking tab.
- Using PROM removal tool, grasp PROM at narrow ends. Gently rock PROM from end to end while pulling up. If installing new PROM, remove old PROM from PROM carrier.
Note. Note reference notch locations in PROM, carrier and PCM for reassembly reference.
- Ensure new PROM has same service number as old one or correct factory upgrade. Place NEW PROM in PROM carrier, and position squarely over PCM PROM socket. Press on PROM carrier until PROM is firmly seated in PCM. NOTE: Ensure reference notches in PCM and PROM are properly aligned. If PROM is installed backwards and ignition is turned on, PROM will be destroyed.
- Install PROM access cover on PCM. Install PCM in vehicle. See INSTALLATION under «CONTROL MODULE»(ref-20112-S14621224712001010200000) . Turn ignition on and ground DLC terminal "B". Check for DTC 51.
- If DTC 51 is present, PROM is not fully seated in PCM, installed backwards, has bent pins, or is defective. If bent pins are cracked while straightening, replace PROM. If PROM is installed backwards or is defective, replace PROM.
