LEMON Manuals: Even more car manuals for everyone
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-7C - No Vehicle Speed Sensor Signal

Test TC-7C - No Vehicle Speed Sensor Signal

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. Turn ignition off. Disconnect Vehicle Speed Sensor (VSS) connector. Inspect terminals. Repair as required. Perform TEST VER-2. If terminals are okay, turn ignition on. Put DRB in voltmeter mode.
  2. Using DRB, check voltage at VSS connector Orange wire. If voltage is less than 7 volts, repair open in appropriate wire. Perform TEST VER-2  . If voltage is more than 7 volts, go to next step.
  3. Using DRB, check voltage at VSS connector White/Orange wire. If voltage is less than 4 volts, go to TEST TC-7D. If voltage is more than 4 volts, go to next step.
  4. Connect one end of a jumper wire to VSS connector White/Orange wire. Using DRB, read vehicle speed. While observing DRB tap other end of jumper wire to VSS connector Black/Light Blue wire.
  5. If DRB does not display more than 0 MPH, go to step 6). If DRB displays more than 0 MPH, remove VSS. Inspect speedometer pinion gear. If speedometer pinion gear is okay, replace VSS. Perform TEST VER-2. If speedometer pinion gear is not okay, repair or replace speedometer pinion gear as necessary. Perform TEST VER-2.
  6. Turn ignition off. Place DRB in ohmmeter mode. Using DRB, check resistance at VSS connector Black/Light Blue wire. If resistance is more than 5 ohms, repair open in Black/Light Blue wire. Perform TEST VER-2. If resistance is less than 5 ohms, disconnect Powertrain Control Module (PCM) connector.
  7. Inspect PCM connector. Repair connector as required. Perform TEST VER-2  . If connector is okay, using an external ohmmeter, check resistance of White/Orange wire between VSS connector and PCM connector terminal No. 47.
  8. 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.
scientia non olet · About LEMON Manuals