MASS AIR FLOW (MAF) SENSOR INSPECTION [L8, LF, L3]

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 [L8, LF, 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 and main relay terminal C

- MAF sensor terminal B and PCM terminal 1P

- MAF sensor terminal C and PCM terminal 1AK

Short circuit

• If there is continuity, the circuit is shorted. Repair or replace the harness.

- MAF sensor terminal A and body GND

- MAF sensor terminal C and power supply

- MAF sensor terminal C and body GND

- MAF sensor terminal B and power supply