Turn the ignition switch ON (II). Measure the voltage between vehicle speed sensor connector terminals No. 2 and No. 3. VEHICLE SPEED SENSOR CONNECTOR Wire side of female terminals Is there about 5 V? YES - Go to step 17. NO - Go to step 12. Measure the voltage between PCM connector terminals A18 and A23 or A24. PCM CONNECTOR A (31P) Wire side of female terminals Is there about 5 V? YES - Repair open in the wire between PCM connector terminal A18 and the vehicle speed sensor. NO - Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good PCM and recheck.

Measure the voltage between PCM connector terminal A20 and body ground. PCM CONNECTOR A (31P) Wire side of female terminals Is there 4.75-5.25 V? YES - Repair open in the wire between PCM connector terminal A20 and the vehicle speed sensor. NO - Go to step 14. Turn the ignition switch OFF. Disconnect PCM connector C (22P). Check for continuity between PCM connector terminal A20 and body ground. PCM CONNECTOR A (31P) Wire side of female terminals Is there continuity? YES - Repair short to ground in the wire between PCM connector terminal A20 and the vehicle speed sensor. NO - Check for loose terminal fit in the PCM connectors. If necessary, substitute a known-good PCM and recheck.