Dtc P0102: Mass Air Flow Circuit Low Input - Suzuki Grand Vitara Service Manual

1A-75 Engine General Information and Diagnosis:
Step
8 MAF sensor signal circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Turn ON ignition switch, measure voltage between
"RED" wire terminal of MAF and IAT sensor connector
and engine ground.
Is voltage 0 V?
9 MAF sensor signal circuit check
1) Turn OFF ignition switch, measure resistance between
"RED" wire terminal of MAF and IAT sensor connector
and engine ground.
Is resistance infinity?
10 MAF sensor signal circuit check
1) Measure resistance between "RED" wire terminal of
MAF and IAT sensor connector and "C37-26" terminal of
ECM connector.
Is resistance below 3
11 Is DTC P2135 detected?
12 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
DTC detecting condition
DTC will be set when all of following conditions are
detected for 0.5 seconds continuously.
• Engine is running
• Voltage of MAF sensor output is less than specified
value for specified time continuously.
(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.
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Action
Ω
?
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Yes
Go to Step 9.
Go to Step 10.
Faulty MAF and IAT
sensor.
Go to "DTC P2135:
Throttle Position Sensor
(Main / Sub) Voltage
Correlation: ".
Go to "DTC P0106:
Manifold Absolute
Pressure Range /
Performance: ".
Trouble area
• Open or short in MAF sensor circuit
• MAF sensor
• ECM
No
"RED" wire is shorted to
others circuit.
"RED" wire is shorted to
ground circuit.
"RED" wire is open or
high resistance circuit.
Go to Step 12.
Substitute a known-
good ECM and recheck.
S5JB0A1104018