Air Flow Meter/Sensor: Testing and Inspection
Inspection1. Check the volume air flow sensor body for cracks and damage. Replace as necessary.
Volume Air Flow Sensor Details:
2. Verify that the measuring core opens smoothly.
3. Measure resistance of the volume air flow sensor.
Volume Air Flow Sensor Specifications:
4. If not as specified, replace the volume air flow sensor.
Testing Using Special Service Tool New Generation Star Tester
1. Check the volume air flow sensor for damage and cracks.
2. Warm up the engine to normal operating temperature.
3. Shift the selector lever to park/neutral position.
4. Turn off all electrical loads.
- Headlight
- Blower motor
- Rear window defroster
- Power steering
- A/C
5. Wait until the cooling fan stops.
New Generation Star (NGS) Tester, Connected to DLC-2:
6. Connect the Special Service Tool (SST) to the data link connector 2.
NGS Display:
7. Select the PID/DATA MONITOR AND RECORD function of the New Generation Star (NGS) tester.
8. Select "VAF V,' on the NGS display. NGS measures and shows the voltage.
NGS Volume Air Flow Sensor Specifications:
9. If not as specified, perform following inspections.
Harness continuity.
- Between Powertrain Control Module (PCM) terminal 3E and volume air flow sensor terminal A
- Between PCM terminal 3A and volume airflow sensor terminal B
- Between PCM terminal 3AB and volume air flow sensor terminal C
Terminal voltage
- Volume air flow sensor terminal B voltage: approx. 5 V
10. If there is incorrect terminal voltage or harness continuity, replace the volume air flow sensor.
NOTE: The scan tool shows the volume air flow rate and load value.