EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GE) FI-45 No. | Terminals | Trouble | Condition | STD Voltage 10 | W — E1 | No voltage | No. trouble ("CHECK ENGINE" warning light off) and engine running | 8 — 14 V ECU FUSE GAUGE 7.5A | "CHECK ENGINE" Warning Light | W Combination Meter | E1 FI0726 1 ECU Voltmeter | W | E1 V FI1261 2 ECU Voltmeter | W V FI1290 3 E1 | ECU Ohmmeter Ω FI0333 1 There is no voltage between ECU terminals W and E1. (Idling) 2 Check that there is voltage between ECU terminal W and body ground. NO | OK 3 Check wiring between ECU terminal E1 and body ground. OK | BAD Try another ECU. | Repair or replace. Check GAUGE fuse (7.5A) and "CHECK ENGINE" warning light. OK | BAD Repair or replace. Fuse blows again Check wiring between ECU | BAD | Repair or replace. terminal W and fuse.