DTC Diagnosis Procedure
1.
CHECK DTC PRIORITY
If DTC P0103 is displayed with DTC P06B0, first perform the trouble diagnosis for DTC P06B0.
Is applicable DTC detected?
Perform diagnosis of applicable. Refer to
DTC Description
.
.
2.
CHECK HARNESS CONNECTOR
Disconnect MAF sensor harness connector and ECM harness connector.
Connect MAF sensor harness connector and ECM harness connector.
Perform DTC Confirmation Procedure.
DTC Description
Is DTC detected?
.
INSPECTION END
3.
CHECK MAF SENSOR POWER SUPPLY
Turn ignition switch OFF.
Disconnect mass air flow (MAF) sensor harness connector.
Turn ignition switch ON.
Check the voltage between MAF sensor harness connector and ground.
+
−
Voltage
MAF sensor
Connector
Terminal
F22
1
Ground
5 V
Is the inspection result normal?
.
Perform the trouble diagnosis for power supply circuit.
4.
CHECK MAF SENSOR GROUND CIRCUIT
Turn ignition switch OFF.
Disconnect ECM harness connector.
Check the continuity between MAF sensor harness connector and ECM harness connector.
+
−
Continuity
MAF sensor
ECM
Connector
Terminal
Connector
Terminal
F22
3
F51
50
Existed
Is the inspection result normal?
.
Repair or replace error-detected parts.
5.
CHECK MAF SENSOR INPUT SIGNAL CIRCUIT
Check the continuity between MAF sensor harness connector and ECM harness connector.
+
−
Continuity
MAF sensor
ECM
Connector
Terminal
Connector
Terminal
F22
2
F51
47
Existed
Also check harness for short to ground and to power.
Is the inspection result normal?
.
Repair open circuit or short to ground or short to power in harness or connectors.
6.
CHECK MAF SENSOR
Check the MAF sensor. Refer to
Component Inspection
.
Is the inspection result normal?
Check intermittent incident. Refer to Intermittent Incident
Intermittent Incident
.
Replace mass air flow sensor. Refer to
Exploded View
.