P1104

N : DTC P0101, P0102, P0103, P1104. MAF Sensor.

N1 : CHECK THE MASS AIR FLOW (MAF) SENSOR POWER SUPPLY
1. Turn the ignition switch to the OFF position.
2. Disconnect the MAF sensor electrical connector PI14.
3. Turn the ignition switch to the ON position.
4. Measure the voltage between PI14, pin 1 (GU) and GROUND.

Is the voltage less than 10 volts?

Yes
Repair the circuit. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.
This circuit includes the power distribution fuse box and the EMS relay.

No
Goto N2

N2 : CHECK THE MAF SENSOR GROUND CIRCUIT
1. Turn the ignition switch to the ON position.
2. Measure the resistance between PI14 pin 2 (BK) and GROUND.

Is the resistance less than 5 ohms?

Yes
Goto N3

No
Repair the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.
This circuit includes the PCM.

N3 : CHECK THE MAF SENSOR SIGNAL CIRCUIT FOR OPEN CIRCUIT
1. Disconnect the PCM electrical connector, PI01.
2. Measure the resistance between PI01, pin 44 (GW) and PI14, pin 3, (GW)

Is the resistance less than 5 ohms?

Yes
Goto N4

No
Repair the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

N4 : CHECK THE MAF SENSOR CIRCUIT FOR SHORT TO GROUND
1. Connect the PCM electrical connector, PI01.
2. Measure the resistance between PI14 pin 3 (GW) and GROUND.

Is the resistance less than 10,000 ohms?

Yes
Repair the short to GROUND. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
Install a new MAF sensor. CLEAR the DTC. TEST the system for normal operation. If the DTC is repeated, INSTALL a new PCM.