Code
C1343
HYUNDAI
C — Chassis
Left Rear LFI Channel Fail | Auto Location Failure RL | Left REAR Low Frequency Initiator Channel Failure
Views:
UK: 13
EN: 34
RU: 18
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in left rear LFI circuit
- Corroded, loose, or damaged left rear connector or terminal
- Faulty left rear LFI (initiator/igniter) or sensor assembly
- Faulty SRS/airbag control module or internal channel failure
- Previous deployment or physical damage not repaired correctly
- Intermittent connector contact due to body panel movement or water ingress
Symptoms
- SRS/Airbag warning lamp illuminated on instrument cluster
- Possible message indicating rear airbag/auto location failure
- Left rear airbag/pretensioner may be disabled
- Onboard diagnostics shows C1343 stored for left rear channel
What to check
- Read and record freeze-frame and all SRS codes with a capable scan tool (OEM-level recommended)
- Visually inspect left rear seat, seatback, side trim and wiring harness for damage, chafing, or corrosion
- Inspect and reseat connectors at left rear initiator and SRS control module; check for bent or pushed-out terminals
- Check vehicle battery voltage is stable during diagnosis and after any jump-starts
- Do not attempt deployment tests without proper tools — follow SRS service manual precautions
Signal parameters
- Module should report normal LFI channel status in live data; fault appears as open/short/invalid response
- Initiator/igniter coil continuity expected (ohms) within manufacturer specification — should not be open or shorted to ground/ignition
- No voltage present on initiator line except controlled test pulses from SRS module (use service procedures to view)
- No intermittent dropouts or erratic values in live SRS data during wiring manipulation
Diagnostic algorithm
- Use an OEM-capable scan tool to read all SRS codes and live data; record freeze frame. Clear codes then re-check to confirm persistence.
- Follow manufacturer SRS safety procedure: switch ignition OFF, disconnect negative battery terminal and wait the specified time (consult service manual) before handling connectors or components.
- Visually inspect left rear wiring, connectors, and harness routing (remove trim as needed). Look for corrosion, pin damage, or water entry. Repair or replace damaged wiring harness or connector.
- With power removed per service instructions, measure continuity/resistance of the LFI/initiator circuit between the module connector and the initiator. Compare to factory spec; replace initiator if open or out of spec.
- Reconnect per procedure, reconnect battery, and perform SRS system self-test with scan tool. Monitor live data while gently manipulating connectors to detect intermittent faults.
- If wiring and initiator check OK, evaluate SRS control module operation and grounds; inspect for water damage or previous crash repairs. Replace module only if confirmed defective and programmed per OEM procedures.
- After repairs, clear codes and verify the SRS lamp goes out and no C1343 returns. Perform any required calibration or system initialization as specified by the manufacturer.
- Safety note: SRS work can be hazardous. If unsure, have repairs performed by a qualified technician following Hyundai service manual safety steps.
Likely causes
- Damaged/shorted harness or connector at left rear initiator
- Corroded/contaminated connector terminals at left rear seat or module
- Failed left rear LFI (igniter/initiator) component
Fault status
Status
Left Rear LFI channel failure — low-frequency initiator circuit open/short/communication fault. SRS warning lamp set; left rear channel disabled until corrected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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Code
C1343
MITSUBISHI
C — Chassis
Brake stroke SNS.high voltage
Views:
UK: 13
EN: 22
RU: 16
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring in left rear LFI circuit
- Corroded, loose, or damaged left rear connector or terminal
- Faulty left rear LFI (initiator/igniter) or sensor assembly
- Faulty SRS/airbag control module or internal channel failure
- Previous deployment or physical damage not repaired correctly
- Intermittent connector contact due to body panel movement or water ingress
Symptoms
- SRS/Airbag warning lamp illuminated on instrument cluster
- Possible message indicating rear airbag/auto location failure
- Left rear airbag/pretensioner may be disabled
- Onboard diagnostics shows C1343 stored for left rear channel
What to check
- Read and record freeze-frame and all SRS codes with a capable scan tool (OEM-level recommended)
- Visually inspect left rear seat, seatback, side trim and wiring harness for damage, chafing, or corrosion
- Inspect and reseat connectors at left rear initiator and SRS control module; check for bent or pushed-out terminals
- Check vehicle battery voltage is stable during diagnosis and after any jump-starts
- Do not attempt deployment tests without proper tools — follow SRS service manual precautions
Signal parameters
- Module should report normal LFI channel status in live data; fault appears as open/short/invalid response
- Initiator/igniter coil continuity expected (ohms) within manufacturer specification — should not be open or shorted to ground/ignition
- No voltage present on initiator line except controlled test pulses from SRS module (use service procedures to view)
- No intermittent dropouts or erratic values in live SRS data during wiring manipulation
Diagnostic algorithm
- Use an OEM-capable scan tool to read all SRS codes and live data; record freeze frame. Clear codes then re-check to confirm persistence.
- Follow manufacturer SRS safety procedure: switch ignition OFF, disconnect negative battery terminal and wait the specified time (consult service manual) before handling connectors or components.
- Visually inspect left rear wiring, connectors, and harness routing (remove trim as needed). Look for corrosion, pin damage, or water entry. Repair or replace damaged wiring harness or connector.
- With power removed per service instructions, measure continuity/resistance of the LFI/initiator circuit between the module connector and the initiator. Compare to factory spec; replace initiator if open or out of spec.
- Reconnect per procedure, reconnect battery, and perform SRS system self-test with scan tool. Monitor live data while gently manipulating connectors to detect intermittent faults.
- If wiring and initiator check OK, evaluate SRS control module operation and grounds; inspect for water damage or previous crash repairs. Replace module only if confirmed defective and programmed per OEM procedures.
- After repairs, clear codes and verify the SRS lamp goes out and no C1343 returns. Perform any required calibration or system initialization as specified by the manufacturer.
- Safety note: SRS work can be hazardous. If unsure, have repairs performed by a qualified technician following Hyundai service manual safety steps.
Likely causes
- Damaged/shorted harness or connector at left rear initiator
- Corroded/contaminated connector terminals at left rear seat or module
- Failed left rear LFI (igniter/initiator) component
Fault status
Status
Left Rear LFI channel failure — low-frequency initiator circuit open/short/communication fault. SRS warning lamp set; left rear channel disabled until corrected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
Similar codes
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
Your feedback helps improve AI descriptions.
👍 Like
0
👎 Dislike
0
Send to email