Dtc B1021: Front Air Bag Deployment Record - 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 (18 pages)
Table of Contents
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8B-27 Air Bag System:
DTC Troubleshooting
Step
1
Was "Air Bag Diagnostic System Check Flow" performed?
2
SDM power supply and ground circuit check
1) Check SDM power supply and ground circuit referring to
"SDM Power Supply and Ground Circuit Check".
Is SDM power supply and ground circuit in good condition?
3
DTC B1017 recheck
1) With ignition switch turned OFF, reconnect SDM
connector.
With ignition switch ON, does DTC B1017 exist?
NOTE
Upon completion of inspection and repair work, perform the following items.
• Reconnect all air bag system components and ensure all components are properly mounted.
• Clear DTCs referring to "DTC Clearance", if any.
• Repeat "Air Bag Diagnostic System Check" to confirm that the trouble has been corrected.
DTC B1021: Front Air Bag Deployment Record
DTC Detecting Condition and Trouble Area
DTC detecting condition
Deployment of front air bag has been recorded in SDM.
NOTE
DTC B1201 can never be cleared once it has been set.
DTC Troubleshooting
Step
1
Was "Air Bag Diagnostic System Check Flow" performed?
2
Front air bag deployment check
1) Turn OFF ignition switch.
2) Check that DTC B1021 has been set although air bag
has not been deployed.
Has air bag deployed?
3
Front impact sign check
1) Inspect front of vehicle and undercarriage for signs of
impact.
Are there any signs of impact?
Action
Action
Yes
Go to Step 2.
Go to Step 3.
Substitute a known-
good SDM and recheck.
Trouble area
If this DTC has been recorded even though air bag has
not been deployed
• SDM
• Driver and/or Passenger air bag module
• Those initiator circuit.
Yes
Go to Step 2.
Inspect and replace
components according
to "Repair and
Inspection Required
after Accident".
Inspect and replace
components according
to "Repair and
Inspection Required
after Accident".
No
Go to "Air Bag
Diagnostic System
Check Flow".
Repair defective wire
circuit.
Intermittent trouble.
Check for intermittent
trouble referring to
"Inspection of
Intermittent and Poor
Connections" If OK,
substitute a known-
good SDM and recheck.
S7RW0A8204014
No
Go to "Air Bag
Diagnostic System
Check Flow".
Go to Step 3.
Replace SDM.
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Table of Contents
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,
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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