Code
B2350
MITSUBISHI
B — Body
Lighting switch
Views:
UK: 11
EN: 16
RU: 10
AI status
Completed
Completed
100%
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
- Confirm the code with a scan tool, note ignition state and any additional codes. Do not replace parts solely on code.
- Inspect fuses and relays for the lighting circuits; replace if blown and recheck for recurrence.
- Perform a visual inspection of the switch, steering column, and connector for damage, corrosion, or moisture. Repair as required.
- With ignition ON, backprobe the switch connector and measure supply voltage and ground. Verify expected voltages and continuity.
- Operate the switch while observing voltage/continuity; look for intermittent changes. Wiggle the harness/steering to reproduce fault.
- If suspect wiring, perform continuity checks between the switch and BCM connector; repair any opens or shorts.
- If switch wiring and fuses are good, bench-test or substitute a known-good lighting switch and re-scan.
- 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.
- 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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Code
B2350
Other
B — Body
Steering Column Switch Circuit Short to Battery
Views:
UK: 23
EN: 30
RU: 19
AI status
Completed
Completed
100%
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
- Confirm the code with a scan tool, note ignition state and any additional codes. Do not replace parts solely on code.
- Inspect fuses and relays for the lighting circuits; replace if blown and recheck for recurrence.
- Perform a visual inspection of the switch, steering column, and connector for damage, corrosion, or moisture. Repair as required.
- With ignition ON, backprobe the switch connector and measure supply voltage and ground. Verify expected voltages and continuity.
- Operate the switch while observing voltage/continuity; look for intermittent changes. Wiggle the harness/steering to reproduce fault.
- If suspect wiring, perform continuity checks between the switch and BCM connector; repair any opens or shorts.
- If switch wiring and fuses are good, bench-test or substitute a known-good lighting switch and re-scan.
- 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.
- 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
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