LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2000 >> MX-5 Miata Base, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P1634: Generator Terminal "B" Circuit Open >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

  1. Check service bulletins. Go to next step.
  2. Using scan tool, access PID/DATA MONITOR. Record PID data for B+ and ALT V. Start engine. If ALTT V PID is more than 17 volts, and B+ PID is less than 11 volts, go to next step. If ALTT V PID is 17 volts or less and B+ PID is 11 volts or more, problem is intermittent (not current).
  3. Turn ignition off. Check battery. If battery is okay, go to next step. If battery is faulty, replace battery and go to step  7.
  4. Check generator terminal "B". If no problem is found, go to next step. If connector is loose, repair as necessary and go to step  7.
  5. Check battery positive cable. If no problem is found, go to next step. If connection is loose, repair as necessary and go to step  7.
  6. Connect cable. Start engine. Disconnect positive battery cable. If engine does not stall, go to next step. If engine stalls, repair open circuit between generator and battery. Go to next step.
  7. Connect all connectors. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. Start engine. If same DTC is not present, go to next step. If same DTC is present, replace PCM. Go to next step.
  8. Erase DTC. See CLEARING CODES in SELF-DIAGNOSTICS - INTRODUCTION - MIATA, MILLENIA, MPV & PROTEGE article. If any DTC is present, go to appropriate test. If no DTC is present, test is complete.
scientia non olet · About LEMON Manuals