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Home / DTC / B1767 — CAN/LIN/SWS converter internal

B1767 — CAN/LIN/SWS converter internal

Detailed page for trouble code B1767.

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Code

B1767

MITSUBISHI B — Body

CAN/LIN/SWS converter internal

Brand: MITSUBISHI
Type: B — Body
Views: UK: 17 EN: 24 RU: 18
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Internal failure of the CAN/LIN–SWS converter module
  • Loss of power or poor ground to the converter
  • Open/short or high resistance in CAN or LIN bus wiring
  • Corroded/loose connector at the converter or steering column
  • Water intrusion or physical damage to module or wiring
  • Software/firmware mismatch or module configuration error

Symptoms

  • Steering wheel switches (audio, cruise, phone) inoperative or intermittent
  • Related functions not responding or responding intermittently
  • Communication-related DTCs present (bus errors or lost comm)
  • Warning indicators related to affected systems (audio, cruise) may illuminate
  • Possible erratic behavior of devices on same bus

What to check

  • Read all stored and pending DTCs on all modules (scan tool) and note freeze-frame data
  • Visually inspect connectors and wiring at the steering column and converter for corrosion, damage or water entry
  • Check fuses and power supply to the converter module
  • Verify good ground at converter/steering column
  • Check for other communication codes (U-codes) that indicate broader bus issues
  • Measure CAN and LIN signals with a multimeter/oscilloscope while operating switches or commanding messages

Signal parameters

  • Module supply voltage: approx. battery voltage (~11–14.5 V with engine running)
  • Ground: low resistance to chassis, continuity near 0 Ω
  • CAN bus idle: differential ~0 V but CANH ≈ CANL ≈ 2.5 V (dominant recessive state)
  • CAN dominant state: CANH ≈ 3.5 V, CANL ≈ 1.5 V (oscilloscope traces expected)
  • LIN bus idle (sleep/idle): pulls up to battery voltage via LIN master (approx. ~12 V); dominant low ≈ 0 V when driven
  • No excessive noise or floating voltages on CAN/LIN lines; bus termination present (120 Ω across CANH/CANL)

Diagnostic algorithm

  1. Connect a capable diagnostic scan tool. Read and record DTCs from all modules. Note whether B1767 is current or intermittent.
  2. Clear code(s). Operate steering wheel switches and monitor for return of B1767 or any U-codes. If code does not return, perform road/operation test to reproduce.
  3. Perform visual inspection of steering column harness, SRS covers (where applicable), connectors and converter for damage or contamination.
  4. Verify battery voltage at the converter power pin with ignition ON. Check ground continuity to chassis.
  5. Check fuses related to steering wheel/infotainment/communication circuits. Replace if blown and retest.
  6. With an oscilloscope or high-speed CAN/LIN tester, observe CANH/CANL and LIN signals while exercising switches to confirm expected idle and active waveforms and message traffic.
  7. If CAN or LIN signals are abnormal, isolate by disconnecting segments (where safe) or unplugging suspect modules one at a time to find short or bus-off source.
  8. Wiggle test harness and connectors while monitoring for intermittent faults. Repair/replace damaged wiring or connectors.
  9. If wiring and bus integrity are good but the fault persists, check for available software updates. Reflash or reprogram the module per manufacturer procedure if applicable.
  10. If module still fails and all external checks are good, replace the CAN/LIN–SWS converter module and repeat verification and code clear. Relearn procedures may be required for some systems.

Likely causes

  • Failed converter module (internal electronics)
  • Blown fuse or intermittent power supply to the converter
  • Damaged LIN single-wire harness in steering column
  • CAN bus short to voltage/ground or missing termination
  • Connector corrosion at steering wheel/column harness
  • Other control module driving the bus into bus-off state

Fault status

⚠️ Status
Internal CAN/LIN–SWS converter malfunction detected. Communication with steering wheel switches interrupted or faulty.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

U0100 U0073 U0121 U0422 B1768
406

Browse 406 MITSUBISHI manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

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Code

B1767

Other B — Body

Seat Driver Forward Circuit Short To Battery

Brand: Other
Type: B — Body
Views: UK: 16 EN: 33 RU: 24
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Internal failure of the CAN/LIN–SWS converter module
  • Loss of power or poor ground to the converter
  • Open/short or high resistance in CAN or LIN bus wiring
  • Corroded/loose connector at the converter or steering column
  • Water intrusion or physical damage to module or wiring
  • Software/firmware mismatch or module configuration error

Symptoms

  • Steering wheel switches (audio, cruise, phone) inoperative or intermittent
  • Related functions not responding or responding intermittently
  • Communication-related DTCs present (bus errors or lost comm)
  • Warning indicators related to affected systems (audio, cruise) may illuminate
  • Possible erratic behavior of devices on same bus

What to check

  • Read all stored and pending DTCs on all modules (scan tool) and note freeze-frame data
  • Visually inspect connectors and wiring at the steering column and converter for corrosion, damage or water entry
  • Check fuses and power supply to the converter module
  • Verify good ground at converter/steering column
  • Check for other communication codes (U-codes) that indicate broader bus issues
  • Measure CAN and LIN signals with a multimeter/oscilloscope while operating switches or commanding messages

Signal parameters

  • Module supply voltage: approx. battery voltage (~11–14.5 V with engine running)
  • Ground: low resistance to chassis, continuity near 0 Ω
  • CAN bus idle: differential ~0 V but CANH ≈ CANL ≈ 2.5 V (dominant recessive state)
  • CAN dominant state: CANH ≈ 3.5 V, CANL ≈ 1.5 V (oscilloscope traces expected)
  • LIN bus idle (sleep/idle): pulls up to battery voltage via LIN master (approx. ~12 V); dominant low ≈ 0 V when driven
  • No excessive noise or floating voltages on CAN/LIN lines; bus termination present (120 Ω across CANH/CANL)

Diagnostic algorithm

  1. Connect a capable diagnostic scan tool. Read and record DTCs from all modules. Note whether B1767 is current or intermittent.
  2. Clear code(s). Operate steering wheel switches and monitor for return of B1767 or any U-codes. If code does not return, perform road/operation test to reproduce.
  3. Perform visual inspection of steering column harness, SRS covers (where applicable), connectors and converter for damage or contamination.
  4. Verify battery voltage at the converter power pin with ignition ON. Check ground continuity to chassis.
  5. Check fuses related to steering wheel/infotainment/communication circuits. Replace if blown and retest.
  6. With an oscilloscope or high-speed CAN/LIN tester, observe CANH/CANL and LIN signals while exercising switches to confirm expected idle and active waveforms and message traffic.
  7. If CAN or LIN signals are abnormal, isolate by disconnecting segments (where safe) or unplugging suspect modules one at a time to find short or bus-off source.
  8. Wiggle test harness and connectors while monitoring for intermittent faults. Repair/replace damaged wiring or connectors.
  9. If wiring and bus integrity are good but the fault persists, check for available software updates. Reflash or reprogram the module per manufacturer procedure if applicable.
  10. If module still fails and all external checks are good, replace the CAN/LIN–SWS converter module and repeat verification and code clear. Relearn procedures may be required for some systems.

Likely causes

  • Failed converter module (internal electronics)
  • Blown fuse or intermittent power supply to the converter
  • Damaged LIN single-wire harness in steering column
  • CAN bus short to voltage/ground or missing termination
  • Connector corrosion at steering wheel/column harness
  • Other control module driving the bus into bus-off state

Fault status

⚠️ Status
Internal CAN/LIN–SWS converter malfunction detected. Communication with steering wheel switches interrupted or faulty.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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U0100 U0073 U0121 U0422 B1768
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