#
MASS AIR FLOW (MAF) SENSOR INSPECTION [L3]

BME014013215W01

## Voltage Inspection

  Note

  • Perform the following inspection only when directed.

1. Visually inspect for the following on the MAF sensor.

  • Damage
  • Cracks
  • Terminal bends
  • Terminal rust

  - If any of the above are found, replace the MAF sensor.
  - If the MAF PID value is out of specification, carry out the "Circuit Open/Short Inspection".

## Circuit Open/Short Inspection

1. Disconnect the PCM connector. (See PCM REMOVAL/INSTALLATION [L3].)

2. Disconnect the MAF sensor connector.

3. Inspect the following wiring harnesses for open or short. (Continuity check)

### Open circuit

  • If there is no continuity, the circuit is open. Repair or replace the harness.
  - MAF sensor terminal A (harness-side) and main relay terminal C (harness-side)
  - MAF sensor terminal B (harness-side) and PCM Terminal 2AC (harness-side)
  - MAF sensor terminal C (harness-side) and PCM Terminal 1P (harness-side)

### Short circuit

  • If there is continuity, the circuit is shorted. Repair or replace the harness.
  - MAF sensor terminal A (harness-side) and body GND
  - MAF sensor terminal C (harness-side) and power supply
  - MAF sensor terminal C (harness-side) and body GND
  - MAF sensor terminal B (harness-side) and power supply