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• Generator field driver (-) • Generator field source (+) • Idle Air Control (IAC) motor • Ignition coil • Leak detection pump (if equipped) • Malfunction indicator lamp (Check engine lamp). Driven through CCD circuits. • SCI transmit (DRB scan tool 16–way connection) • Speed control vacuum solenoid • Speed control vent solenoid • Tachometer (if equipped). Driven through CCD circuits. • Transmission convertor clutch solenoid OPERATION - 5 VOLT SUPPLIES Primary 5–volt supply: Crankshaft Position (CKP) sensor. • supplies the required 5 volt power source to the Camshaft Position (CMP) sensor. • supplies a reference voltage for the Manifold Absolute Pressure (MAP) sensor. • supplies a reference voltage for the Throttle Position Sensor (TPS) sensor. Secondary 5–volt supply: oil pressure sensor. • supplies the required 5 volt power source for the Vehicle Speed Sensor (VSS) (if equipped). • supplies the 5 volt power source to the transmis- sion pressure sensor (if equipped with an RE auto- OPERATION - IGNITION CIRCUIT SENSE The ignition circuit sense input tells the PCM the ignition switch has energized the ignition circuit. Battery voltage is also supplied to the PCM through the ignition switch when the ignition is in 9ignition sense9 circuit and is used to 9wake up9 the PCM. Voltage on the ignition input can be as low REMOVAL USE THE DRB SCAN TOOL TO REPROGRAM THE NEW POWERTRAIN CONTROL MODULE To avoid possible voltage spike damage to the PCM, ignition key must be off, and negative battery cable must be disconnected before unplugging PCM (1) Disconnect negative battery cable at battery. connectors. Shields snap to connectors. (3) Carefully unplug four electrical connectors (3) (Fig. 5) or (Fig. 6) from PCM. (4) Remove three PCM mounting bolts (1) or (2) and remove PCM from vehicle. Fig. 5 PCM MOUNTING - LEFT HAND DRIVE 1 - MOUNTING SCREWS (3) Fig. 6 PCM MOUNTING - RIGHT HAND DRIVE 1 - PCM TJ ELECTRONIC CONTROL MODULES 8E - 9 POWERTRAIN CONTROL MODULE (Continued) |