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

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## Visual Inspection

  Note

  • Perform the following inspection only when directed.

1. Visually inspect for the following on the MAF sensor. (See INTAKE AIR SYSTEM REMOVAL/INSTALLATION [L3 Turbo].)

  • Damage
  • Cracks
  • Bent terminals
  • 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 Turbo].)

2. Disconnect the MAF sensor connector.

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

### Open circuit

  • If there is no continuity, there is an open circuit. Repair or replace the wiring harness.
  - MAF sensor terminal A and main relay terminal C
  - MAF sensor terminal B and PCM terminal 1I
  - MAF sensor terminal C and PCM terminal 1P

### Short circuit

  • If there is continuity, there is a short circuit. Repair or replace the wiring harness.
  - MAF sensor terminal A and body ground
  - MAF sensor terminal C and power supply
  - MAF sensor terminal C and body ground
  - MAF sensor terminal B and power supply

Specification

Condition | Intake MAF (g/s) | Engine load calculated value (%)
--- | --- | ---
Idle*1 | 2.72-2.94 | 17.1-18.5
Engine Speed 2,500 rpm*2 | 8.00-8.66 | 14.2-15.2

  *1 :
650-750 rpm
  *2 :
No load or neutral position