Electric Load Sensor: Testing and Inspection

Fig. 12 Electric Load Detector Location & Electrical Connector Terminal Identification:

Fig. 13 Electric Load Detector Test Chart. 1992 Civic:

1. Remove cover from main fuse panel located in engine compartment, then disconnect electrical connector from electric load detector unit, Fig. 12.
2. With ignition switch on, check for battery voltage between electrical connector positive (black/yellow wire) terminal and negative (black) terminal, Fig. 12.
3. If battery voltage is present, proceed to step 4. If no voltage is present, measure voltage between BLK/YEL terminal and body ground. If battery voltage is present, repair open in BLK wire between electric load detector connector and ground. If battery voltage is not present, repair open in BLK/YEL wire between fuse and electric load detector connector.
4. With ignition switch On, check voltage between electric load detector electrical connector green/red terminal and ground, Fig. 12. Voltage should be approximately 4.5 to 5 volts. If voltage is as specified, proceed to step 5. If voltage is not as specified, check green/red wire between electric load detector and PFI electronic control unit. If wiring is satisfactory, electronic control unit may be at fault.
5. Turn ignition switch off and connect electric load detector connector to electric load detector.
6. Connect test harness tool No. 07LAJ-PT3010A or equivalent between ECU and connector.
7. Start engine and allow it to idle. Under conditions listed in Fig. 13 measure voltage between D10 terminal and A26 terminal.
8. If voltage is not as specified in chart, electric load detector is faulty. If voltage is as specified in chart, substitute a known-good ECU and recheck. If symptom is corrected, replace original ECU.