Mass Air Flow Sensor - Above Upper Limit

P0103

Mass Air Flow Sensor - Above Upper Limit

Function
The mass air flow sensor delivers a signal to calculate the intake air mass. The intake air mass is a precise reflection of the load condition of the engine.

Diagnosis conditions
Engine speed greater than 400 rpm and at least 0.8 seconds after start-up.

P0101-P0103:

Wiring Diagram







Diagnosis Procedure

DTC P0101







DTC P0102







DTC P0103







1 Check wiring from MAF sensor to DME control module for continuity.

1. Remove connector of MAF sensor.
2. Connect special tool 9616 to wiring harness (DME control module connector).
3. Connect ohmmeter to special tool 9616, pin 17, and MAF sensor connector, pin 5.
Display: 0 - 5 ohms

If Infinity ohm is displayed, check wiring harness for chafing and pinching damage.

2 Check wiring from MAF sensor to DME control module for short to ground.

1. Remove connector of MAF sensor.
2. Connect special tool 9616 to wiring harness (DME control module connector).
3. Connect ohmmeter to special tool 9616, pin 17, and to ground, pin 6.
Display: Infinity ohm

If 0 - 5 ohms is displayed, check wiring for chafing and pinching damage.

3 Check wiring from MAF sensor to DME control module for short to B+.

1. Remove connector of MAF sensor.
2. Connect special tool 9616 to wiring harness (DME control module connector).
3. Connect voltmeter to special tool 9616, pin 17 (B+), and to ground, pin 6.
4. Switch on the ignition.
5. Display: 0 V

If battery voltage is displayed, check wiring harness for chafing and pinching damage.