Dtc P0102: Mass Air Flow Circuit Low Input - Suzuki 2006 SX4 Service Manual

1A-66 Engine General Information and Diagnosis:
Step
10 MAF sensor signal circuit check
1) Measure resistance between "GRN/BLK" wire terminal
of MAF and IAT sensor connector and "C01-26" terminal
of ECM connector.
Is resistance below 3
11 Is DTC P0106 displayed?

DTC P0102: Mass Air Flow Circuit Low Input

Wiring Diagram
Refer to "DTC P0101: Mass Air Flow Circuit Range / Performance".
DTC Detecting Condition and Trouble Area
Voltage of MAF sensor output is less than specified value for specified time
with engine running.
(1 driving cycle detection logic)
DTC Confirmation Procedure
1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Start engine and run it for 10 sec.
4) Check DTC and pending DTC.
DTC Troubleshooting
NOTE
Before this troubleshooting is performed, read the precautions for DTC troubleshooting referring to
"Precautions for DTC Troubleshooting".
Step
1 Was "Engine and Emission Control System Check"
performed?
2 MAF sensor and its circuit check
1) Connect scan tool to DLC with ignition switch turned
OFF.
2) Start engine and check MAF value displayed on scan
tool. (Refer to "Scan Tool Data" for normal value.)
Is normal value indicated?
3 MAF sensor power supply voltage check
1) Disconnect connector from MAF and IAT sensor with
ignition switch turned OFF.
2) Turn ON ignition switch, measure voltage between
engine ground and "BLK/RED" wire terminal of MAF and
IAT sensor connector.
Is voltage 10 – 14 V?
Action
Ω
?
DTC detecting condition
Action
Yes
Faulty MAF and IAT
sensor.
Go to "DTC P0106:
Manifold Absolute
Pressure Range /
Performance".
Trouble area
• Open or short in MAF sensor circuit
• MAF sensor
• ECM
Yes
Go to Step 2.
Intermittent trouble.
Check for intermittent
referring to "Intermittent
and Poor Connection
Inspection in Section
00".
Go to Step 4.
No
"GRN/BLK" wire is open
or high resistance
circuit.
Substitute a known-
good ECM and recheck.
S6RW0D1104018
No
Go to "Engine and
Emission Control
System Check".
Go to Step 3.
"BLK/RED" wire is open
circuit.