Code
B1576
MITSUBISHI
B — Body
PS.cut SW SHT.to BATT.for N.O
Views:
UK: 12
EN: 40
RU: 22
AI status
Completed
Completed
100%
Causes
- Wiring shorted to battery (chafed insulation, pin contacting a 12V source)
- Faulty switch with internal short or stuck contact
- Damaged or corroded connector pins causing unintended battery feed
- Incorrect or poor after-market wiring/modifications tied to constant 12V
- Blown/shorted relay or fuse circuit supplying 12V to the switch circuit
- Control module internal short (less common)
Symptoms
- Related system (cut-off function) will not behave correctly or remains engaged
- Associated warning lamp or DTC illumination
- Battery drain when vehicle off (if short is continuous)
- Intermittent operation of the controlled circuit
- Fuses blowing or repeated fuse failure in the circuit
What to check
- Read and record freeze-frame / fault conditions and any related codes.
- Visual inspection of harness, switch, and connectors for damage, corrosion or pinouts.
- Check relevant fuses and relays for continuity and signs of overheating.
- Measure voltage at the switch terminals with ignition off and on (verify presence or absence of battery voltage).
- Disconnect the switch connector and see if the code or voltage condition clears.
- Wiggle-test harness and connectors while monitoring voltage/continuity to reproduce the fault.
Signal parameters
- Expected (N.O. contact open): terminal voltage ~0 V (or floating) with respect to ground; no continuity to battery.
- Fault condition (short to battery): terminal voltage ~12 V (battery voltage) with respect to ground when N.O. should be open.
- Expected resistance open: very high (>>1 MΩ) between circuit terminal and battery positive when switch open.
- Fault resistance indicative of short: low resistance (
- Connector voltage tolerance: battery voltage ±0.5 V under no-load conditions.
Diagnostic algorithm
- Retrieve all stored codes and freeze-frame data. Note ignition/key position, engine on/off, and other conditions when DTC set.
- Perform a visual inspection of harnesses, connectors, and the switch body for damage, pin corrosion, melted insulation or aftermarket splices.
- With battery voltage known, measure voltage at the switch input and output terminals with the switch in the N.O. position. Compare to expected values (see signal_params).
- Disconnect the switch connector. If the voltage disappears and the code clears, suspect the switch or wiring between connector and battery feed; if it remains, suspect upstream short to battery.
- Check continuity/resistance from the circuit terminal to battery positive with ignition off. Low resistance indicates short; open/high resistance indicates open circuit elsewhere.
- Isolate sections by removing/inspecting fuses or disconnecting downstream modules one at a time while monitoring the circuit to find where the battery feed is appearing.
- If harness damage is found, repair wiring with proper crimp/solder and heat-shrink, repair/replace damaged connectors, and replace the switch if it is internally shorted.
- After repair, clear codes, perform functional checks of the affected system, and run the vehicle through the conditions that previously set the code to confirm the fault is resolved.
- If the fault persists and wiring/switch checks normal, consider control module diagnosis by an electrical specialist or dealer-level service (possible internal short).
Likely causes
- Harness damage near steering column or switch mounting (rubbed through insulation touching a 12V feed)
- Switch assembly failure allowing battery feed to appear on N.O. terminal
- Connector pushed out or terminal mis-seated feeding 12V into the circuit
- Recent repairs or accessories that spliced into a constant 12V node
Fault status
Status
Circuit voltage detected on power cut switch terminal when Normally Open contact should be open — short to battery suspected.
Repair difficulty: Medium
Diagnostic time: 0.5-2.0 hours
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Code
B1576
Other
B — Body
Lamp Park Input Circuit Open
Views:
UK: 20
EN: 40
RU: 29
AI status
Completed
Completed
100%
Causes
- Wiring shorted to battery (chafed insulation, pin contacting a 12V source)
- Faulty switch with internal short or stuck contact
- Damaged or corroded connector pins causing unintended battery feed
- Incorrect or poor after-market wiring/modifications tied to constant 12V
- Blown/shorted relay or fuse circuit supplying 12V to the switch circuit
- Control module internal short (less common)
Symptoms
- Related system (cut-off function) will not behave correctly or remains engaged
- Associated warning lamp or DTC illumination
- Battery drain when vehicle off (if short is continuous)
- Intermittent operation of the controlled circuit
- Fuses blowing or repeated fuse failure in the circuit
What to check
- Read and record freeze-frame / fault conditions and any related codes.
- Visual inspection of harness, switch, and connectors for damage, corrosion or pinouts.
- Check relevant fuses and relays for continuity and signs of overheating.
- Measure voltage at the switch terminals with ignition off and on (verify presence or absence of battery voltage).
- Disconnect the switch connector and see if the code or voltage condition clears.
- Wiggle-test harness and connectors while monitoring voltage/continuity to reproduce the fault.
Signal parameters
- Expected (N.O. contact open): terminal voltage ~0 V (or floating) with respect to ground; no continuity to battery.
- Fault condition (short to battery): terminal voltage ~12 V (battery voltage) with respect to ground when N.O. should be open.
- Expected resistance open: very high (>>1 MΩ) between circuit terminal and battery positive when switch open.
- Fault resistance indicative of short: low resistance (
- Connector voltage tolerance: battery voltage ±0.5 V under no-load conditions.
Diagnostic algorithm
- Retrieve all stored codes and freeze-frame data. Note ignition/key position, engine on/off, and other conditions when DTC set.
- Perform a visual inspection of harnesses, connectors, and the switch body for damage, pin corrosion, melted insulation or aftermarket splices.
- With battery voltage known, measure voltage at the switch input and output terminals with the switch in the N.O. position. Compare to expected values (see signal_params).
- Disconnect the switch connector. If the voltage disappears and the code clears, suspect the switch or wiring between connector and battery feed; if it remains, suspect upstream short to battery.
- Check continuity/resistance from the circuit terminal to battery positive with ignition off. Low resistance indicates short; open/high resistance indicates open circuit elsewhere.
- Isolate sections by removing/inspecting fuses or disconnecting downstream modules one at a time while monitoring the circuit to find where the battery feed is appearing.
- If harness damage is found, repair wiring with proper crimp/solder and heat-shrink, repair/replace damaged connectors, and replace the switch if it is internally shorted.
- After repair, clear codes, perform functional checks of the affected system, and run the vehicle through the conditions that previously set the code to confirm the fault is resolved.
- If the fault persists and wiring/switch checks normal, consider control module diagnosis by an electrical specialist or dealer-level service (possible internal short).
Likely causes
- Harness damage near steering column or switch mounting (rubbed through insulation touching a 12V feed)
- Switch assembly failure allowing battery feed to appear on N.O. terminal
- Connector pushed out or terminal mis-seated feeding 12V into the circuit
- Recent repairs or accessories that spliced into a constant 12V node
Fault status
Status
Circuit voltage detected on power cut switch terminal when Normally Open contact should be open — short to battery suspected.
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?
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👍 Like
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👎 Dislike
0
Send to email