
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