DTC P0462: Fuel Gauge Sending Unit Circuit Input Low: Testing

NOTE: Ensure freeze frame data has been recorded. Check for service bulletins and on-line information.

Turn ignition on. Using scan tool, access PID/DATA MONITOR. Record PID data for FTL V. If FTL V PID is less than .1 volt, go to next step. If FTL V PID is .1 volt or more, go to TROUBLE SHOOTING - NO CODES article.
Turn ignition off. Disconnect fuel gauge sending unit connector. Check for connector or terminal problems. If no problem is present, go to next step. If a problem is present, repair as necessary. After repair, go to step 6 .
Disconnect fuel gauge sending unit connector. Turn ignition on. Using scan tool, access PID/DATA MONITOR. Record PID data for FTL V. If FTL V PID is less than 4.9 volts, go to next step. If FTL V PID is 4.9 volts or more, repair or replace sending unit. After repair, go to step 6 .
Turn ignition off. Disconnect PCM connector. PCM is mounted to passenger floor, behind glove box. Check continuity between sending unit harness connector terminal "A" (Gray/Red wire) and ground. If continuity is not present, go to next step. If continuity is present, repair short to ground on Gray/Red wire between sending unit and PCM. After repair, go to step 6 .
Check continuity between sending unit harness connector terminals "A" (Gray/Red wire) and "C" (Black/Orange wire). If continuity is not present, go to next step. If continuity is present, repair circuit problem. After repair, go to next step.
Reconnect all components. Turn ignition on. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Recheck DTCs. If DTC P0462 is pending, replace PCM and go to next step. If DTC P0462 is not pending, go to next step.
Perform after repair procedure. See AFTER REPAIR PROCEDURE . If no DTC is present, testing is complete. If any DTC is present, go to appropriate test for diagnosis and repair.