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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Tests W/Codes - 3.0L) >> Diagnostic Charts >> Test TC-3A - No Cam Sync Signal At Pcm (DTC 54)

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

WARNING: This page is about a different car, the 1994 Plymouth Sundance, 1994 Plymouth Acclaim, 1994 Dodge Spirit, 1994 Dodge Shadow, and 1994 Chrysler LeBaron. 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 DIRECTORY  . For wiring diagrams, see WIRING DIAGRAMS  .
  1. Using DRB, erase trouble codes. Attempt to start engine. If engine will not start, crank engine for at least 20 seconds. Using DRB, read trouble codes. If DRB does not display NO CAM SYNC SIGNAL AT PCM, go to next step. If DRB displays NO CAM SYNC SIGNAL AT PCM, go to step 4).
  2. At this time, condition required to set trouble code is not present. NO CAM SYNC SIGNAL AT PCM trouble code sets if Powertrain Control Module (PCM) does not see a camshaft position sensor signal with crankshaft position sensor signal present. Possible causes are: open or shorted crankshaft position sensor Orange wire, open crankshaft position sensor Black/Light Blue wire, open or shorted camshaft position sensor Gray/Black wire, damaged pulse ring, failed sensor, or failed PCM. Go to next step.
  3. Inspect all related wiring and connectors. Repair as necessary. Perform TEST VER-2  . If wiring and connectors are okay, see INACTIVE TROUBLE CODE CONDITION  in this article. Perform TEST VER-2.
  4. Turn ignition off. Disconnect and inspect distributor connector. Repair as required. Perform TEST VER-2. If distributor connector is okay, go to next step.
  5. Turn ignition on. Place DRB in voltmeter mode. Using DRB, check voltage of distributor connector (harness side) Tan/Yellow wire. If voltage is more than 4 volts, replace camshaft position sensor. Perform TEST VER-2.
  6. If voltage is less than 4 volts, turn ignition off. Disconnect PCM connector. Using an external ohmmeter, check resistance of camshaft position sensor Tan/Yellow wire between distributor connector (harness side) and PCM connector terminal No. 44.
  7. If resistance is more than 5 ohms, repair open in Tan/Yellow wire. Perform TEST VER-2. If resistance is less than 5 ohms, go to next step.
  8. Place DRB in ohmmeter mode. Using DRB, check resistance of PCM connector terminal No. 44 (Tan/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Tan/Yellow wire. Perform TEST VER-2. If resistance is more than 5 ohms, replace PCM. Perform TEST VER-2.
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