FI-38 EFI SYSTEM — Troubleshooting for EFI Electronic Circuit with Volt/Ohmmeter Vs ** E2 ① There is no specified voltage at ECU terminals Vs 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 Check wiring between ECU terminal E2 and body ground. BAD Repair or replace Refer to No. 1. BAD Repair or replace OK ③ 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. THA ~ E2 ① There is no voltage between ECU terminals THA and E2. (IG S/W ON) Check that there is voltage between ECU terminal +B and body ground. (IG S/W ON) OK NO ② Check air temp. sensor. Refer to No. 1. BAD OK Replace air temp. Check wiring between ECU and sensor. air temp. sensor. OK BAD Try another ECU. Repair or replace wiring.