FI/EFI System, page 60

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