EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter FI-37 No. | Terminal | Trouble | Condition | STD Voltage 3 | Vc — E₂ | No voltage | Ignition S/W ON | Measuring plate fully closed | 4 — 6 V | Vs — E₂ | | | Measuring plate fully open | 4 — 5 V | Vs — E₂ | | | | 0.02 — 0.08 V | Vs — E₂ | Idling | | | 2 — 4 V | Vs — E₂ | 3,000 rpm | | | 0.3 — 1.0 V | THA — E₂ | IG S/W ON | Intake air temperature 20°C (68°F) | 1 — 2 V Air Flow Meter F/P Connector ECU +B E₂ Vs Vc THA E₁ FI0738 Voltmeter ECU ① Vc V + — • Vc ↔ E₂ ① There is no voltage between ECU terminals Vc and E₂. (IG S/W ON) ② Check that there is voltage between ECU terminal +B and body ground. (IG S/W ON) NO | OK ③ Check wiring between ECU terminal E₂ and body ground. BAD Repair or replace Refer to No. 1. | BAD → Repair or replace OK ↓ Check air flow meter. | BAD → Repair or replace OK ↓ Check wiring between ECU and air flow meter. | BAD → Repair or replace OK ↓ Try another ECU. Voltmeter ② ECU +B V + — Ohmmeter ③ ECU Ω + — FI0790