Toyota 3F-E - Page 95

No.
Terminals Trouble
Condition
STD
Voltage
4 THA — E22 No voltage
Ignition switch
ON
Intake air temperature 20°C
(68°F)
1 — 3 V
ECU
• +B
(
+B1)
E22
E2
THA
Air Temp. Sensor
( Air Flow Meter)
THA
El
•
Fll 272
Refer to No. 1.
(See page FI-30)
OK
NO
Check wiring between ECU terminal El and body
ground.
OK
1
O
Check air temp. sensor.
(See page FI-62)
BAD
Repair or replace.
BAD OK
Rep ace air
flow meter.
Check wiring between ECU and
air temp. sensor
OK
BAD
Try another ECU.
Repair or replace.
FI-36
EFI SYSTEM —
Troubleshooting with Volt/Ohmmeter
O
There is no voltage between ECU terminals THA and E22.
(IG SW ON)
2
Check that there is voltage between ECU terminal + B
( + B1) and body ground.
(IG SW ON)
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