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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 27 (Engine Controls - Tests W/Codes - 3.0L) >> Self-Diagnostic Tests >> Test TC-7D - No Vehicle Speed Sensor Signal

Test TC-7D - No Vehicle Speed Sensor Signal

WARNING: This page is about a different car, the 1995 Plymouth Voyager, 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Dodge Caravan. 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.
  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector terminals. Repair as required. Perform TEST VER-2. If PCM connector is okay, go to next step.
  2. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 47 (White/Orange wire). If resistance is less than 5 ohms, repair short to ground in White/Orange wire. Perform TEST VER-2. If resistance is more than 5 ohms, go to next step.
  3. Using an external ohmmeter, check resistance of White/Orange wire between VSS connector and PCM connector terminal No. 47. If resistance is more than 5 ohms, repair open White/Orange wire. Perform TEST VER-2. If resistance is less than 5 ohms, replace PCM. Perform TEST VER-2.