Dtc P0103: Mass Air Flow Circuit High Input - Suzuki SX4 Service Manual
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Also See for SX4:
- Owner's manual (47 pages) ,
- Owner's manual (278 pages) ,
- Owner's manual (16 pages)
Table of Contents
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Step
6
MAF sensor signal circuit check
1) Disconnect connectors from ECM with ignition switch
turned OFF.
2) Measure voltage between "GRN/BLK" wire terminal of
MAF and IAT sensor connector and engine ground with
ignition switch turned ON.
Is voltage 0 V?
7
MAF sensor signal circuit check
1) Measure resistance between "GRN/BLK" wire terminal
of MAF and IAT sensor connector and engine ground
with ignition switch turned OFF.
Is resistance infinity?
8
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
9
MAF sensor output signal check
1) Connect connectors to MAF and IAT sensor and ECM
with ignition switch turned OFF.
2) Measure voltage between "C01-26" and "C01-27"
terminals of ECM connector referring to "Mass Air Flow
(MAF) and Intake Air Temperature (IAT) Sensor On-
Vehicle Inspection in Section 1C".
Is each value within specified range?
DTC P0103: Mass Air Flow Circuit High 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 more 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.
Action
Ω
?
DTC detecting condition
Engine General Information and Diagnosis:
Yes
Go to Step 7.
Go to Step 8.
Go to Step 9.
Substitute a known-
good ECM and recheck.
• Open or short in MAF sensor circuit
• MAF sensor
• ECM
1A-67
No
"GRN/BLK" wire is
shorted to other circuit.
"GRN/BLK" wire is
shorted to ground
circuit.
"GRN/BLK" wire is open
or high resistance
circuit.
Faulty MAF and IAT
sensor.
S7RW0A1104021
Trouble area
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Table of Contents
Troubleshooting
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Do you have a question about the SX4 and is the answer not in the manual?
Questions and answers
Adjust throttle motor
The idle speed on a Suzuki SX4 should be controlled by the Idle Air Control Valve (IACV) rather than adjusting the idle screw on the throttle body, as the screw is factory set. Before using compressed air in the idle-air-bypass passages, the IACV should be removed to prevent damage to its delicate mechanism. If there is an issue with idle speed, checking the IACV function and referring to the SX4 service manual is recommended.
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I have an issue of crank but not starting When I scan it brought this codeU0100 Which means no communication thou crank sensor wire was cut off but it was fix back What could be wrong and what could be the solution,
increasing revs when changing gears
The Suzuki SX4 may have increasing revs when changing gears due to its drive-by-wire system and the difference in final drive ratios between the manual (4.41) and automatic (2.81) transmissions. This difference causes high cruising RPMs in the manual version and sluggishness in the automatic. Additionally, if the revs climb while going uphill, it may be due to the transmission downshifting or kicking out of overdrive. Other possible causes include low transmission fluid, abuse, or a faulty transmission design.
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My heater stopped working the blower **** is good, control unit ?
Possible issues with the heater in a Suzuki SX4 if the blower is working but the heater is not include:
1. Incorrect Temperature Output
- Temperature control cable broken or bent (non-A/C and manual A/C) → Check the temperature control cable.
- Temperature selector faulty (non-A/C and manual A/C) → Check the temperature selector.
- Incorrect installation of the temperature control cable (non-A/C and manual A/C) → Check and adjust the position as necessary.
- Temperature control door assembly broken → Repair the temperature control door assembly.
- Air ducts clogged → Repair air ducts.
- Heater core leaked or clogged → Replace the heater core.
- Heater hoses leaked or clogged → Replace heater hoses.
- Thermostat faulty → Check the thermostat.
- Temperature control actuator faulty (auto A/C) → Check the temperature control actuator.
- HVAC control module faulty (auto A/C) → Check the HVAC control module.
- Wiring or grounding faulty (auto A/C) → Repair as necessary.
2. Other Possible Causes
- Air flow control cable broken or bent → Check the air flow control cable.
Checking and addressing these components should help identify and resolve the heater issue.
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