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Home / DTC / B2350 — Lighting switch

B2350 — Lighting switch

Detailed page for trouble code B2350.

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22,491specific
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Code

B2350

MITSUBISHI B — Body

Lighting switch

Brand: MITSUBISHI
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty lighting/combination switch (mechanical wear or internal short/open)
  • Damaged wiring harness (open, short to ground or power, chafing)
  • Corroded or loose connector terminals at the switch or control module
  • Blown fuse or failed lighting relay
  • Poor ground connection
  • Faulty body control module (BCM) or lighting control module

Symptoms

  • Headlights, parking lights or instrument illumination fail to turn on or operate intermittently
  • High/low beam or turn-signal/headlight switch functions inconsistent
  • Dash lighting or indicator lamps not operating correctly
  • Exterior lights stuck on or off
  • Flickering lights or brightness changes with steering/wiring movement
  • Possible battery drain if circuit is shorted

What to check

  • Use a scan tool to read DTC B2350 and any related codes; record freeze-frame data and ignition/body status
  • Visually inspect the lighting switch assembly, steering column area, and connectors for damage, corrosion or signs of water ingress
  • Check relevant fuses and relays for continuity and correct operation
  • Wiggle test: operate switch while observing lights and connectors for intermittent operation
  • Measure supply voltage at the switch connector with ignition ON (battery voltage expected when circuit powered)
  • Check ground continuity from switch ground terminal to chassis

Signal parameters

  • Switch supply voltage: ~12 V with ignition and lighting circuit enabled (verify with meter)
  • Ground continuity: near 0 Ω between switch ground and chassis ground
  • Closed switch continuity: low resistance (typically < 5 Ω) between relevant switch terminals when activated
  • Open switch continuity: very high resistance/OL when switch not activated
  • Intermittent: fluctuating voltage or intermittent open/short when manipulating harness or switch
  • If switch is multiplexed: diagnostic messages appear on vehicle network (verify with module data stream)

Diagnostic algorithm

  1. Confirm the code with a scan tool, note ignition state and any additional codes. Do not replace parts solely on code.
  2. Inspect fuses and relays for the lighting circuits; replace if blown and recheck for recurrence.
  3. Perform a visual inspection of the switch, steering column, and connector for damage, corrosion, or moisture. Repair as required.
  4. With ignition ON, backprobe the switch connector and measure supply voltage and ground. Verify expected voltages and continuity.
  5. Operate the switch while observing voltage/continuity; look for intermittent changes. Wiggle the harness/steering to reproduce fault.
  6. If suspect wiring, perform continuity checks between the switch and BCM connector; repair any opens or shorts.
  7. If switch wiring and fuses are good, bench-test or substitute a known-good lighting switch and re-scan.
  8. If replacement switch does not clear the fault, inspect BCM inputs/outputs, and verify module software and CAN communication. Consider module diagnostics or reprogramming per service manual.
  9. After repairs, clear codes and verify proper function over a test drive and multiple ignition cycles.

Likely causes

  • Intermittent or open contact inside the lighting/combination switch
  • Corroded connector or pin at the switch
  • Broken wire between switch and BCM
  • Blown fuse protecting lighting circuit

Fault status

⚠️ Status
Lighting switch circuit malfunction detected. Possible open, short, intermittent contact, or communication failure in the lighting/combination switch circuit. Inspect switch, wiring, fuses, and related control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2340 B2351 B2360 B2570
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

B2350

Other B — Body

Steering Column Switch Circuit Short to Battery

Brand: Other
Type: B — Body
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty lighting/combination switch (mechanical wear or internal short/open)
  • Damaged wiring harness (open, short to ground or power, chafing)
  • Corroded or loose connector terminals at the switch or control module
  • Blown fuse or failed lighting relay
  • Poor ground connection
  • Faulty body control module (BCM) or lighting control module

Symptoms

  • Headlights, parking lights or instrument illumination fail to turn on or operate intermittently
  • High/low beam or turn-signal/headlight switch functions inconsistent
  • Dash lighting or indicator lamps not operating correctly
  • Exterior lights stuck on or off
  • Flickering lights or brightness changes with steering/wiring movement
  • Possible battery drain if circuit is shorted

What to check

  • Use a scan tool to read DTC B2350 and any related codes; record freeze-frame data and ignition/body status
  • Visually inspect the lighting switch assembly, steering column area, and connectors for damage, corrosion or signs of water ingress
  • Check relevant fuses and relays for continuity and correct operation
  • Wiggle test: operate switch while observing lights and connectors for intermittent operation
  • Measure supply voltage at the switch connector with ignition ON (battery voltage expected when circuit powered)
  • Check ground continuity from switch ground terminal to chassis

Signal parameters

  • Switch supply voltage: ~12 V with ignition and lighting circuit enabled (verify with meter)
  • Ground continuity: near 0 Ω between switch ground and chassis ground
  • Closed switch continuity: low resistance (typically < 5 Ω) between relevant switch terminals when activated
  • Open switch continuity: very high resistance/OL when switch not activated
  • Intermittent: fluctuating voltage or intermittent open/short when manipulating harness or switch
  • If switch is multiplexed: diagnostic messages appear on vehicle network (verify with module data stream)

Diagnostic algorithm

  1. Confirm the code with a scan tool, note ignition state and any additional codes. Do not replace parts solely on code.
  2. Inspect fuses and relays for the lighting circuits; replace if blown and recheck for recurrence.
  3. Perform a visual inspection of the switch, steering column, and connector for damage, corrosion, or moisture. Repair as required.
  4. With ignition ON, backprobe the switch connector and measure supply voltage and ground. Verify expected voltages and continuity.
  5. Operate the switch while observing voltage/continuity; look for intermittent changes. Wiggle the harness/steering to reproduce fault.
  6. If suspect wiring, perform continuity checks between the switch and BCM connector; repair any opens or shorts.
  7. If switch wiring and fuses are good, bench-test or substitute a known-good lighting switch and re-scan.
  8. If replacement switch does not clear the fault, inspect BCM inputs/outputs, and verify module software and CAN communication. Consider module diagnostics or reprogramming per service manual.
  9. After repairs, clear codes and verify proper function over a test drive and multiple ignition cycles.

Likely causes

  • Intermittent or open contact inside the lighting/combination switch
  • Corroded connector or pin at the switch
  • Broken wire between switch and BCM
  • Blown fuse protecting lighting circuit

Fault status

⚠️ Status
Lighting switch circuit malfunction detected. Possible open, short, intermittent contact, or communication failure in the lighting/combination switch circuit. Inspect switch, wiring, fuses, and related control module.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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B2340 B2351 B2360 B2570
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