Diagnosis & Repair Procedure

Ensure FREEZE FRAME PID data has been recorded. Check service bulletins. Go to next step.
Using scan tool, retrieve pending and stored DTCs. See SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. If DTC P1103 is not present, go to next step. If DTC P1103 is present, go to appropriate test and repair first.
Using scan tool, access PID/DATA MONITOR. Record PID data for ECT, TP and MAF. Start engine. Ensure ECT PID is 176°F (80°C) or more. Drive vehicle with MAF PID more than 8.36 lb/min. If TP PID is less than 12.5 percent, go to next step. If TP PID is 12.5 percent or more, problem is not current (intermittent).
Turn ignition off. Disconnect TP sensor. Inspect TP sensor and harness connector terminals. If no problem is found, go to next step. If problem is found, repair as necessary and go to step 7 .
Check TP sensor resistance while gradually opening throttle. If resistance changes smoothly, go to next step. If resistance does not change smoothly, replace TP sensor. Go to step 7 .
Turn ignition off. Disconnect PCM connector. Inspect PCM and harness connector terminals. If no problem is found, go to next step. If problem is found, repair as necessary and go to next step.
Connect all connectors. Start engine. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Ensure ECT PID is 176°F (80°C) or more. Drive vehicle for at least 5 seconds in the following conditions:
- MAF PID is more than 8.36 lb/min.
- TP PID is 12.5 percent or more.
If same DTC is not pending, go to next step. If same DTC is pending, replace PCM. After repair, go to next step.
Clear DTC from memory. Recheck for DTCs. If any DTC is present, diagnose and repair DTC. If no DTCs are present, test is complete.