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Test FC-7B - No Vehicle Speed Sensor Signal

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION  . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
  1. Using DRB-II, read electronic automatic transmission faults. If any electronic automatic transmission faults (Codes 50-58) are present, repair transmission as required.
  2. If electronic automatic transmission faults are not present, turn ignition off. Disconnect Transmission Control Module (TCM) connector. Turn ignition on. Place DRB-II in voltmeter mode. Using DRB-II, check voltage of TCM connector terminal No. 58, speed sensor signal circuit (White/Orange wire).
  3. If voltage is more than 4 volts, go to step 7). If voltage is less than 4 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Inspect PCM connector and repair as required. Perform VERIFICATION PROCEDURE VER-2. If PCM connector is okay, go to next step.
  4. Using an external ohmmeter, check resistance of speed sensor signal circuit (White/Orange wire) between PCM connector terminal No. 47 and TCM connector terminal No. 58.
  5. If resistance is more than 5 ohms, repair open in White/Orange wire. Perform VERIFICATION PROCEDURE VER-2. If resistance is less than 5 ohms, place DRB-II in ohmmeter mode. Using DRB-II, check resistance of PCM connector terminal No. 47, speed sensor signal circuit (White/Orange wire).
  6. If resistance is less than 5 ohms, repair short to ground in White/Orange wire. Perform VERIFICATION PROCEDURE VER-2. If resistance is more than 5 ohms, replace PCM. Perform VERIFICATION PROCEDURE VER-2.
  7. If voltage was more than 4 volts in step 3), using DRB-II, read vehicle speed MPH value. Connect one end of a jumper wire to TCM connector terminal No. 58, speed sensor signal circuit (White/Orange wire).
  8. While observing DRB-II vehicle speed MPH display, connect other end of jumper wire to ground. If DRB-II displays vehicle speed more than 0 MPH, replace TCM. Perform VERIFICATION PROCEDURE VER-2. If DRB-II displays vehicle speed of 0 MPH or less, turn ignition off.
  9. Disconnect PCM connector. Using an external ohmmeter, check resistance of speed sensor signal circuit (White/Orange wire) between PCM connector terminal No. 47 and TCM connector terminal No. 58.
  10. If resistance is less than 5 ohms, replace PCM. Perform VERIFICATION PROCEDURE VER-2. If it is more than 5 ohms, repair open in White/Orange wire. Perform VERIFICATION PROCEDURE VER-2.
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