Connect vehicle speed sensor connector. Measure the voltage between PCM connector terminals A18 and A23 or A24. PCM CONNECTOR A (31P) Wire side of female terminals Is there about 0-5 V? YES - Go to step 19. NO - Replace the vehicle speed sensor.

Raise the front of the vehicle and make sure it is securely supported. Set the parking brake and block both rear wheels securely. Start the engine, then shift to position and drive the vehicle. Measure the voltage between PCM connector terminals A18 and A23 or A24. PCM CONNECTOR A (31P) Wire side of female terminals Is there 1.5-3.5 V? YES - Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good PCM and recheck. NO - Replace the vehicle speed sensor.