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1997 Mazda 626

Tiny
UGARACECHICK
  • MEMBER
  • 1997 MAZDA 626
1997 Mazda 626 4 cyl Manual

My Mazda 626 4 cylinder is running rough. I suspect the Mass Air Flow Sensor as the culprit. I need to know how to test a MAF sensor to see if it is working properly. Please help.
Monday, July 19th, 2010 AT 6:52 PM

1 Reply

Tiny
DAVE H
  • MECHANIC
  • 13,383 POSTS
MASS AIRFLOW (MAF) SENSOR
M/T (Using Engine Signal Monitor)
Visually check MAF sensor for cracks or damage. Connect Engine Signal Monitor (49 9200 162A) to ECM/PCM, using proper overlay and adapter cables. Measure voltage at ECM/PCM terminal 3B. See the MASS AIRFLOW (MAF) SENSOR VOLTAGE table. If voltage is not as specified, check wiring harness and connector between ECM/PCM and MAF sensor. See appropriate wiring diagram in WIRING DIAGRAMS - 2.0L article. Repair as necessary. If wiring harness and connector are okay, replace MAF sensor.

MASS AIRFLOW (MAF) SENSOR VOLTAGE
Condition. Volts
2.0L M/T
Ignition On.1-1.5
Idle.1.5-5
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Tuesday, July 20th, 2010 AT 3:44 AM

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