1996 Toyota Tercel DX, 4D Sedan, AutomaticFACTORY OEM SERVICE PROCEDURE

Diagnosis & Repair

  1. Test drive vehicle and check operation of speedometer. If speedometer is not functioning correctly, see INSTRUMENT PANELS article. If speedometer is functioning correctly, go to next step.
  2. Access ECM behind glove box. Ensure ignition is off. Ensure shift lever is in Neutral. Lift and support front of vehicle. Turn ignition on.
  3. Using DVOM, backprobe ECM connector. Measure voltage between ground and terminal No. 13 (Yellow wire) at ECM E6 connector while slowly rotating front wheel. See Figure. DVOM should indicate a pulse voltage from zero to 4.5-5.5 volts.
  4. If voltage is as specified, replace ECM and retest. If voltage is not as specified, check for an open circuit in wiring harness between instrument cluster and ECM. See appropriate wiring diagram in WIRING DIAGRAMS article. Repair as necessary.
Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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