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Home / DTC / B1568 — DR.cut SW SHT.to GND for COM

B1568 — DR.cut SW SHT.to GND for COM

Detailed page for trouble code B1568.

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22,491specific
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Code

B1568

MITSUBISHI B — Body

DR.cut SW SHT.to GND for COM

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

Causes

  • Damaged wiring harness with insulation rubbed or chafed to chassis ground
  • Shorted pin or terminal in a connector (corrosion, bent terminal contacting shell)
  • Faulty or internally shorted DR.cut switch
  • Water intrusion or contamination in connector or switch
  • Failed control module (COM) internal short
  • Incorrect previous repair or aftermarket accessory tied into the circuit

Symptoms

  • Related function inoperative or intermittent (depends on which circuit DR.cut SW controls)
  • Fuse blows or repeated fuses for the circuit
  • Related warning lamp or message on dash
  • DTC B1568 stored and may be accompanied by other electrical codes
  • Possible battery drain if short is present continuously

What to check

  • Retrieve freeze frame and full code list with a scan tool; clear and re-check to confirm repeatability
  • Visual inspection of switch, connectors, and wiring harness along routing (look for chafe, pinching, corrosion, moisture)
  • Check fuses and relays related to the circuit
  • Back-probe switch connector and verify signal voltage/continuity with key ON and switch operated
  • Disconnect the switch and see if the code clears/reappears (isolation test)
  • Measure resistance from the circuit conductor to chassis ground to detect a short

Signal parameters

  • Key ON, switch open: signal circuit should typically be at battery voltage through pull-up or at defined inactive voltage (model-dependent)
  • Key ON, switch closed: circuit should change state (voltage drops to near 0V or to ground reference) depending on design
  • Continuity: closed switch = low resistance (a few ohms to tens of ohms); open switch = high resistance (kΩ to OL)
  • Short test: continuity to chassis ground should be present only when circuit intentionally grounded; otherwise should read open or very high resistance
  • Circuit current draw: should be low in quiescent state (refer to specific service data); excessive current indicates short

Diagnostic algorithm

  1. Connect a scan tool, record the code and any related codes, and note freeze-frame/conditions when stored.
  2. Perform a visual inspection of the switch, connector, harness routing (especially through doors, hinges, and body panels), and repair any obvious damage.
  3. With ignition OFF, disconnect the DR.cut switch connector. Clear codes and cycle ignition. If B1568 does not return, suspect the switch or wiring downstream of connector.
  4. With connector disconnected, measure resistance from the circuit pin to chassis ground. A low resistance indicates a short to ground in wiring or downstream component.
  5. If short persists with switch disconnected, isolate sections of harness by disconnecting at intermediate connectors and retesting to locate the shorted segment.
  6. Back-probe the switch connector with key ON and operate the switch while monitoring voltage to confirm correct signal changes and to check for intermittent faults (wiggle test harness).
  7. If wiring and switch test good, inspect and test the COM/control module connector for damaged pins or internal shorts; if necessary, consult module-specific diagnostic procedures before replacement.
  8. Repair or replace damaged wiring, terminals, or switch as appropriate. After repair, clear codes and perform functional test and road test to confirm fault does not return.
  9. If replacement of wiring and switch does not clear the issue, follow manufacturer procedures for control module diagnosis; avoid replacing the module without thorough verification.

Likely causes

  • Short in wiring near door hinge or common harness routing point
  • Corroded/loose connector at the switch or at the control module
  • Defective DR.cut switch with internal short to ground
  • Ground strap or body contact causing unintended grounding of the signal

Fault status

⚠️ Status
Short to ground detected on DR.cut SW circuit for COM. Inspect switch, connectors, wiring routing and control module for damage or corrosion. Repair wiring or replace faulty components and verify.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

Similar codes

B1567 B1569 B1530 B1520 B1200
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

B1568

Other B — Body

Lamp Headlamp High-Beam Circuit Open

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

Causes

  • Damaged wiring harness with insulation rubbed or chafed to chassis ground
  • Shorted pin or terminal in a connector (corrosion, bent terminal contacting shell)
  • Faulty or internally shorted DR.cut switch
  • Water intrusion or contamination in connector or switch
  • Failed control module (COM) internal short
  • Incorrect previous repair or aftermarket accessory tied into the circuit

Symptoms

  • Related function inoperative or intermittent (depends on which circuit DR.cut SW controls)
  • Fuse blows or repeated fuses for the circuit
  • Related warning lamp or message on dash
  • DTC B1568 stored and may be accompanied by other electrical codes
  • Possible battery drain if short is present continuously

What to check

  • Retrieve freeze frame and full code list with a scan tool; clear and re-check to confirm repeatability
  • Visual inspection of switch, connectors, and wiring harness along routing (look for chafe, pinching, corrosion, moisture)
  • Check fuses and relays related to the circuit
  • Back-probe switch connector and verify signal voltage/continuity with key ON and switch operated
  • Disconnect the switch and see if the code clears/reappears (isolation test)
  • Measure resistance from the circuit conductor to chassis ground to detect a short

Signal parameters

  • Key ON, switch open: signal circuit should typically be at battery voltage through pull-up or at defined inactive voltage (model-dependent)
  • Key ON, switch closed: circuit should change state (voltage drops to near 0V or to ground reference) depending on design
  • Continuity: closed switch = low resistance (a few ohms to tens of ohms); open switch = high resistance (kΩ to OL)
  • Short test: continuity to chassis ground should be present only when circuit intentionally grounded; otherwise should read open or very high resistance
  • Circuit current draw: should be low in quiescent state (refer to specific service data); excessive current indicates short

Diagnostic algorithm

  1. Connect a scan tool, record the code and any related codes, and note freeze-frame/conditions when stored.
  2. Perform a visual inspection of the switch, connector, harness routing (especially through doors, hinges, and body panels), and repair any obvious damage.
  3. With ignition OFF, disconnect the DR.cut switch connector. Clear codes and cycle ignition. If B1568 does not return, suspect the switch or wiring downstream of connector.
  4. With connector disconnected, measure resistance from the circuit pin to chassis ground. A low resistance indicates a short to ground in wiring or downstream component.
  5. If short persists with switch disconnected, isolate sections of harness by disconnecting at intermediate connectors and retesting to locate the shorted segment.
  6. Back-probe the switch connector with key ON and operate the switch while monitoring voltage to confirm correct signal changes and to check for intermittent faults (wiggle test harness).
  7. If wiring and switch test good, inspect and test the COM/control module connector for damaged pins or internal shorts; if necessary, consult module-specific diagnostic procedures before replacement.
  8. Repair or replace damaged wiring, terminals, or switch as appropriate. After repair, clear codes and perform functional test and road test to confirm fault does not return.
  9. If replacement of wiring and switch does not clear the issue, follow manufacturer procedures for control module diagnosis; avoid replacing the module without thorough verification.

Likely causes

  • Short in wiring near door hinge or common harness routing point
  • Corroded/loose connector at the switch or at the control module
  • Defective DR.cut switch with internal short to ground
  • Ground strap or body contact causing unintended grounding of the signal

Fault status

⚠️ Status
Short to ground detected on DR.cut SW circuit for COM. Inspect switch, connectors, wiring routing and control module for damage or corrosion. Repair wiring or replace faulty components and verify.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.5 hours

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B1567 B1569 B1530 B1520 B1200
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