DLC Circuit Troubleshooting
  1. While disconnecting each of the parts or connectors below, one at a time, check for continuity between PGM-FI main relay 1 4P connector terminal No. 2 and body ground.
    • PGM-FI main relay 2 (FUEL PUMP)
    • PGM-FI subrelay
    • ECM/PCM connector A (49P)
    • Each injector 2P connector
    • MAF/IAT sensor 5P connector
    • Camshaft position (CMP) sensor 3P connector
    • Crankshaft position (CKP) sensor 3P connector
    • Electronic throttle control system (ETCS) control relay
Does continuity go away when one of the above parts or connectors is disconnected?
YES -
Replace the part that made the short to body ground go away when disconnected. If the part is the ECM/PCM, update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM. Also replace the No. 17 FI MAIN (15 A) fuse.■
NO -
Go to Step 42 .
  1. Disconnect these parts or connectors:
    • PGM-FI main relay 2 (FUEL PUMP)
    • PGM-FI subrelay
    • ECM/PCM connector A (49P)
    • Injectors
    • MAF/IAT sensor 5P connector
    • Camshaft position (CMP) sensor
    • Crankshaft position (CKP) sensor
    • Electronic throttle control system (ETCS) control relay