FI-60 EFI SYSTEM — Troubleshooting with Volt/Ohmmeter (7M-GTE) No. Terminals Trouble Condition STD Voltage 5 THA – E2 No voltage Ignition switch Intake air temperature 20°C (68°F) 1 – 3 V ON ECU +B (+B1) Air Temp. Sensor (Air Flow Meter) THA E2 THA E2 E1 FI3706 ① There is no voltage between ECU terminals THA and E2. (IG SW ON) ECU Voltmeter THA E2 ② Check that there is voltage between ECU terminal +B (+B1) and body ground. (IG SW ON) OK NO Refer to No. 1. (See page FI-54) FI2767 ② Check wiring between ECU terminal E1 and body ground. ECU Voltmeter +B OK BAD Repair or replace. ③ Check air temp. sensor. (See page FI-96) BAD OK Replace air flow meter. Check wiring between ECU and air temp. sensor. FI2767 Air Flow Meter ③ Ohmmeter THA E2 OK BAD Try another ECU. Repair or replace. FI8826