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11 CHECK MASS AIR FLOW SENSOR
1. Turn ignition switch ON.
2. Start engine and warm it up to normal operating temperature.
3. Check voltage between ECM terminal 54 (Mass air flow sensor signal) and ground.
SEF326V
MTBL0326
4. If the voltage is out of specification, disconnect mass air flow sensor harness connector and connect it again. Repeat
above check.
5. If NG, remove mass air flow sensor from air duct. Check hot wire for damage or dust.
SEF893J
OK or NG
OK 䊳 GO TO 12.
NG 䊳 Replace mass air flow sensor.
DTC P0120 THROTTLE POSITION SENSOR
KA24DE
Diagnostic Procedure (Cont’d)
EC-184
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