Test TC-2B - No Crank Reference Signal At Pcm
WARNING: This page is about a different car, the 1995 Dodge Pickup and 1995 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION
. For wiring diagrams, see WIRING DIAGRAMS
section at the end of this article.
- Turn ignition off. Disconnect Camshaft Position (CMP) sensor connector. Inspect CMP sensor connector for damaged or pushed-out terminals. Repair as necessary. Perform TEST VER-2. If CMP sensor connector terminals are okay, go to next step.
- Turn ignition on. Using scan tool in voltmeter mode, check voltage on CMP sensor connector, 8-volt supply circuit (Orange wire). If voltage is more than 7 volts, replace CMP sensor. Perform TEST VER-2.
- If voltage is less than 7 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector for damaged or pushed-out terminals. Repair as necessary. Perform TEST VER-2. If PCM connector terminals are okay, go to next step.
- Using scan tool in ohmmeter mode, check resistance of Crankshaft Position Sensor (CKP) connector, 8-volt supply circuit (Orange wire). If resistance is less than 5 ohms, repair short to ground in Orange wire. Perform TEST VER-2.
- If resistance is more than 5 ohms, using an external ohmmeter, check resistance of 8-volt supply circuit (Orange wire) between CKP sensor harness side connector and PCM connector terminal No. 7. If resistance is more than 5 ohms, repair open Orange wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.