P0103

DTC P0103 MAF SENSOR




Component Description
The mass air flow sensor is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. It consists of a hot wire that is supplied with electric current from the ECM. The temperature of the hot wire is controlled by the ECM a certain amount. The heat generated by the hot wire is reduced as the intake air flows around it. The more air, the greater the heat loss. Therefore,the ECM must supply more electric current to maintain the temperature of the hot wire as air flow increases. The ECM detects the air flow by means of this current change.

CONSULT-II Reference Value In Data Monitor Mode:

On Board Diagnosis Logic:

Fail-Safe Mode:

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch OFF and wait at least 5 seconds before conducting the next test.

PROCEDURE FOR DTC P0103

With CONSULT-II
1. Turn ignition switch "ON".




2. If 1st trip DTC is detected,
Select "DATA MONITOR" mode with CONSULT-II.
3. Wait at least 6 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.
If 1st trip DTC is not detected, go to next step.
5. Start engine and let it idle for at least 6 seconds.
6. If 1st trip DTC is detected, go to "Diagnostic Procedure" below.

With GST
Follow the procedure "With CONSULT-II".

EC-MAFS-01:

Wiring Diagram


Diagnostic Procedure

Diagnostic Procedure Step 1 - 3:

Diagnostic Procedure Step 4 - 7:

Diagnostic Procedure Step 8 - 9: