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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 180 (Engine Controls - Tests W/Codes - 4.0L) >> Self-Diagnostic Tests >> Test TC-7B - No Vehicle Speed Sensor Signal

Test TC-7B - No Vehicle Speed Sensor Signal

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-7A  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.
  1. Turn ignition off. Disconnect Powertrain Control Module (PCM) connector and ensure connector is clean and not damaged. Repair as necessary. If no problems were found with wiring or connectors, 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, go to next step. If resistance is more than 5 ohms, go to step 4).
  3. Using an external ohmmeter, check resistance of signal circuit (White/Orange wire) between VSS sensor connector and PCM connector terminal No. 47. If resistance is less than 5 ohms, replace PCM. If resistance is more than 5 ohms, repair open in White/Orange wire.
  4. If vehicle is not equipped with Daytime Running Lights (DRL), repair short to ground in VSS signal circuit. If vehicle is equipped with DRL, disconnect DRL module connector and ensure connector is clean and not damaged. DRL module is located near blower motor on XJ body, near coolant overflow reservoir on YJ body or under Power Distribution Center on ZJ body. Using scan tool in ohmmeter mode, check resistance of PCM connector terminal No. 47 (White/Orange wire). If resistance is more than 5 ohms, replace DRL module. If resistance is less than 5 ohms, repair short to ground in VSS signal circuit.
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