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OPERATION PCM OUTPUT The ASD relay supplies battery voltage (12+ volts) to the fuel injectors and ignition coil(s). With certain emissions The ground circuit for the coil within the ASD relay is controlled by the Powertrain Control Module (PCM). The PCM The ASD relay will be shut–down, meaning the 12–volt power supply to the ASD relay will be de-activated by the • the ignition key is left in the ON position. This is if the engine has not been running for approximately 1.8 • there is a crankshaft position sensor signal to the PCM that is lower than pre-determined values. ASD SENSE - PCM INPUT A 12 volt signal at this input indicates to the PCM that the ASD has been activated. The relay is used to connect the This input is used only to sense that the ASD relay is energized. If the Powertrain Control Module (PCM) does not REMOVAL The ASD relay is located in the engine compartment within the Power Distribution Center (PDC). Refer to label on 1. Remove PDC cover. 2. Remove relay from PDC. 3. Check condition of relay terminals and PDC connector terminals for damage or corrosion. Repair if necessary before installing relay. 4. Check for pin height (pin height should be the same for all terminals within the PDC connector). Repair if nec- essary before installing relay. INSTALLATION The ASD relay is located in the Power Distribution Center (PDC). Refer to label on PDC cover for relay location. 1. Install relay to PDC. 2. Install cover to PDC. SENSOR-CAMSHAFT POSITION DESCRIPTION 3.7L V-6 The Camshaft Position Sensor (CMP) on the 3.7L 6-cylinder engine is bolted to the right-front side of the right cyl- 4.7L V-8 The Camshaft Position Sensor (CMP) on the 4.7L V-8 engine is bolted to the right-front side of the right cylinder 5.7L V-8 The Camshaft Position Sensor (CMP) on the 5.7L V-8 engine is located below the generator on the timing chain / 8I - 16 IGNITION SYSTEM - SERVICE INFORMATION WK |