Abnormal Noise Symptom Diagnosis Of A/C System - Suzuki SX4 Service Manual
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Also See for SX4:
- Owner's manual (47 pages) ,
- Owner's manual (18 pages) ,
- Owner's manual (278 pages)
Table of Contents
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Condition
Cool air does not come
out only at high speed
Insufficient air flow of
cooled air
Abnormal Noise Symptom Diagnosis of A/C System
Abnormal Noise from Compressor
Condition
During compressor
operation, a rumbling
noise is heard
proportional to engine
revolutions
A loud noise is heard at a
certain rpm,
disproportionately to
engine revolution
A loud rattle is heard at
low engine rpm
Abnormal Noise from Magnetic Clutch
Condition
A rumbling noise is heard
when compressor is not
in operation
A chattering noise is
heard when compressor
is in operation
Possible cause
Excessive amount of refrigerant
A/C evaporator frosted
A/C evaporator clogged or frosted
Air leaking from HVAC unit or air duct
Blower motor faulty
Wiring or grounding faulty
Possible cause
Inadequate clearance in scroll area
Loose or faulty compressor drive belt
Loose compressor mounting bolts
Loose compressor clutch plate bolt
Possible cause
Worn or damaged bearings
Faulty magnet clutch clearance
(excessive clearance)
Worn magnet clutch friction surface
Compressor oil leaked from shaft seal,
contaminating the friction surface
Air Conditioning System: Manual Type 7B-15
Correction / Reference Item
Check the amount of refrigerant.
Check A/C evaporator and evaporator
temperature sensor referring to "Evaporator
Inspection: Manual Type" and "Evaporator
Temperature Sensor Inspection: Manual Type".
Check A/C evaporator and evaporator
temperature sensor referring to "Evaporator
Inspection: Manual Type" and "Evaporator
Temperature Sensor Inspection: Manual Type".
Repair as necessary.
Check blower motor referring to "Blower Motor
Inspection in Section 7A".
Repair as necessary.
Correction / Reference Item
Replace compressor.
Adjust drive belt tension or replace drive belt.
Retighten mounting bolts.
Retighten clutch plate bolt.
Replace compressor if it was operated in this
condition for a long time.
Correction / Reference Item
Replace magnet clutch assembly.
Adjust magnet clutch clearance.
Replace magnet clutch assembly.
Replace compressor body assembly.
S7RW0A7214005
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Troubleshooting
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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,
A Suzuki SX4 that cranks but does not start with a U0100 code (Lost Communication with ECM/PCM) after the crank sensor wire was repaired could have the following issues:
1. Faulty Engine Swap: The engine may not be compatible or not properly installed, as noted in the context that the problem started after an engine replacement.
2. Crankshaft Sensor Issues: Even after repairing the crank sensor wire, the sensor itself could be faulty or not sending a proper signal.
3. ECU Communication Problem (U0100): This indicates a loss of communication with the ECU, possibly due to wiring faults, poor ground connections, or a damaged ECU.
4. Starter Motor Issues: Although the engine cranks, if the starter motor is weak or has voltage issues (as noted with 11.5V), it may not spin the engine fast enough for it to start.
In summary, the likely causes are improper engine installation, crank sensor signal issues, ECU communication failure, or weak starter motor performance.
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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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دلایل بالا رفتن مصرف بنزین در مدل اتومات
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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