Test TC-3A - No Cam Sync Signal At Pcm (DTC 54)

WARNING: This page is about a different car, the 1995 Jeep Wrangler, 1995 Jeep Grand Cherokee, and 1995 Jeep Cherokee. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: Perform TEST TC-1A before proceeding with this test. For connector terminal identification, see CONNECTOR IDENTIFICATION at beginning of article. For wiring diagrams, see WIRING DIAGRAMS at the end of this article. Perform TEST VER-2A after each repair.

Using scan tool, erase trouble code messages. Attempt to start engine. If engine will not start, crank engine for at least 10 seconds.
Using scan tool, read trouble code messages. If scan tool does not display NO CAM SYNC SIGNAL AT PCM, go to next step. If scan tool displays NO CAM SYNC SIGNAL AT PCM, go to step 5).
Condition required to set trouble codes is not present at this time. NO CAM SYNC SIGNAL AT PCM trouble code message sets if Powertrain Control Module does not see Camshaft Position (CMP) sensor signal with Crankshaft Position (CKP) sensor signal present. Possible causes are: failed CMP sensor, open or shorted CMP sensor signal circuit (Tan/Yellow wire on XJ and YJ bodies or Gray/Black wire on ZJ body), open CMP sensor 8-volt supply circuit (Orange wire on XJ and YJ bodies or White/Black wire on ZJ body), open CMP sensor ground circuit (Black/Light Blue wire), improperly adjusted CMP sensor or failed Powertrain Control Module (PCM). Go to next step.
Inspect all related wiring and connectors and repair as necessary. If no problems were found with wiring or connectors, see INACTIVE DTC CONDITION in this article. Test is complete.
Turn ignition off. Disconnect Camshaft Position (CMP) sensor connector and ensure connector is clean and not damaged. Turn ignition on. Using scan tool in voltmeter mode, check voltage of CMP sensor connector, 8-volt supply circuit (Orange wire on XJ and YJ bodies or White/Black wire on ZJ body). If voltage is more than 7 volts, go to next step. If voltage is less than 7 volts, repair open in Orange wire on XJ and YJ bodies or White/Black wire on ZJ body.
Connect a jumper wire between CMP sensor connector terminal No. 1 (Tan/Yellow wire on XJ and YJ or Gray/Black wire on ZJ) signal circuit and terminal No. 2 (Black/Light Blue wire) sensor ground. Make and break jumper wire connection. Without turning ignition off, start engine. If engine does not start, go to next step. If engine starts, replace CMP sensor.
Turn ignition off. Remove distributor cap. Have assistant crank engine. If rotor turns, go to next step. If rotor does not turn, remove distributor and repair distributor drive.
Using scan tool in ohmmeter mode, check resistance of CMP sensor ground at CMP sensor connector terminal No. 2 (Black/Light Blue wire). If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open sensor ground.
Turn ignition off. Disconnect Powertrain Control Module (PCM) connector and ensure connector is clean and not damaged. Repair as necessary. If PCM connector terminals are okay, go to next step.
Using an external ohmmeter, check resistance of CMP signal circuit (Tan/Yellow wire on XJ and YJ bodies or Gray/Black wire on ZJ body) between CMP sensor connector terminal No. 1 and PCM connector terminal No. 44. If resistance is less than 5 ohms, go to next step. If resistance is more than 5 ohms, repair open in CMP sensor signal circuit.
Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 44. If resistance is more than 5 ohms, replace PCM. If resistance is less than 5 ohms, repair short to ground in Tan/Yellow wire on XJ and YJ bodies or Gray/Black wire on ZJ body.