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Home / DTC / B2958 — Security System Sensor Data Circuit High

B2958 — Security System Sensor Data Circuit High

Detailed page for trouble code B2958.

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Code

B2958

HUMMER B — Body

Security System Sensor Data Circuit High

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

Causes

  • Short to battery voltage on the sensor data circuit
  • Faulty security sensor (door/hood/trunk/tilt/impact) with internal short
  • Damaged wiring or pinched/chafed harness causing short to Vbatt
  • Corroded or loose connector(s) at sensor or body control module (BCM)
  • Faulty BCM or security module internal driver
  • Water intrusion or contamination in sensor or connector

Symptoms

  • Security/anti-theft warning lamp illuminated or flashing
  • False alarms or inability to arm/disarm the security system
  • Door lock/unlock or remote keyless functions may be intermittent or inoperative
  • Stored or recurring B2958 DTC on scan tool

What to check

  • Retrieve freeze frame and current data with a capable scan tool; note which sensor(s) are flagged
  • Inspect related fuses and power/ground circuits for the BCM/security module
  • Visually inspect wiring and connectors for the security sensors (doors, hood, trunk, tilt/impact) for damage, corrosion, or water intrusion
  • Check for aftermarket alarm/remote start interfaces; disconnect if present and retest
  • Perform a wiggle test of harnesses while monitoring fault status or live data

Signal parameters

  • Typical digital sensor data circuits use 0–5 V logic levels; 'circuit high' generally means voltage above the expected threshold (often >4.5 V)
  • With ignition ON, expected idle voltage on data line: near 0 V (low) or a defined signal waveform depending on sensor type—consult vehicle service data for exact values
  • Resistance to ground on a disconnected sensor circuit should be high (open) unless pulled up by module; short to 12 V will show ~12 V at sensor connector

Diagnostic algorithm

  1. Connect a compatible scan tool, read codes and freeze frame. Record which sensor or zone is reported.
  2. Clear the code and see if it returns immediately or under specific conditions (doors open/closed, key fob use, vehicle movement).
  3. Visually inspect connectors and wiring for the reported sensor(s). Repair any obvious damage, reseal or replace corroded connectors.
  4. With ignition ON (engine off) backprobe the sensor data pin at the sensor connector and measure voltage. Compare to expected values from service data. If the voltage is high (~12 V), suspect a short to battery.
  5. Disconnect the suspect sensor and observe if the DTC clears or changes. If disconnecting the sensor removes the fault, replace the sensor and retest.
  6. If the fault remains with the sensor disconnected, trace the harness toward the BCM looking for a short to battery or a fused ignition feed inadvertently tied in. Repair wiring as required.
  7. Check grounds and related power supplies to the BCM/security module. Repair poor grounds and corroded power feeds.
  8. If wiring and sensors test good, perform module input/output testing per manufacturer procedures. Replace BCM/security module only after confirming wiring and sensors are good.
  9. After repairs, clear codes and perform functional test (arm/disarm system, walk-around test) and confirm code does not return.

Likely causes

  • Short to battery in sensor harness near sensor or splice
  • Corroded connector at sensor causing intermittent high voltage reading
  • Failed sensor pulling data line high
  • Damaged insulation allowing chafe to contact battery feed or constant 12V source
  • Aftermarket device tied into sensor circuit

Fault status

⚠️ Status
Security System Sensor Data Circuit High — sensor data line voltage above allowed threshold; stored when module detects high-voltage condition on security sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2957 B2959 B2782 B2797 B2786
Repair manuals

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Code

B2958

MITSUBISHI B — Body

Side latch LH open:close timeout

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

Causes

  • Short to battery voltage on the sensor data circuit
  • Faulty security sensor (door/hood/trunk/tilt/impact) with internal short
  • Damaged wiring or pinched/chafed harness causing short to Vbatt
  • Corroded or loose connector(s) at sensor or body control module (BCM)
  • Faulty BCM or security module internal driver
  • Water intrusion or contamination in sensor or connector

Symptoms

  • Security/anti-theft warning lamp illuminated or flashing
  • False alarms or inability to arm/disarm the security system
  • Door lock/unlock or remote keyless functions may be intermittent or inoperative
  • Stored or recurring B2958 DTC on scan tool

What to check

  • Retrieve freeze frame and current data with a capable scan tool; note which sensor(s) are flagged
  • Inspect related fuses and power/ground circuits for the BCM/security module
  • Visually inspect wiring and connectors for the security sensors (doors, hood, trunk, tilt/impact) for damage, corrosion, or water intrusion
  • Check for aftermarket alarm/remote start interfaces; disconnect if present and retest
  • Perform a wiggle test of harnesses while monitoring fault status or live data

Signal parameters

  • Typical digital sensor data circuits use 0–5 V logic levels; 'circuit high' generally means voltage above the expected threshold (often >4.5 V)
  • With ignition ON, expected idle voltage on data line: near 0 V (low) or a defined signal waveform depending on sensor type—consult vehicle service data for exact values
  • Resistance to ground on a disconnected sensor circuit should be high (open) unless pulled up by module; short to 12 V will show ~12 V at sensor connector

Diagnostic algorithm

  1. Connect a compatible scan tool, read codes and freeze frame. Record which sensor or zone is reported.
  2. Clear the code and see if it returns immediately or under specific conditions (doors open/closed, key fob use, vehicle movement).
  3. Visually inspect connectors and wiring for the reported sensor(s). Repair any obvious damage, reseal or replace corroded connectors.
  4. With ignition ON (engine off) backprobe the sensor data pin at the sensor connector and measure voltage. Compare to expected values from service data. If the voltage is high (~12 V), suspect a short to battery.
  5. Disconnect the suspect sensor and observe if the DTC clears or changes. If disconnecting the sensor removes the fault, replace the sensor and retest.
  6. If the fault remains with the sensor disconnected, trace the harness toward the BCM looking for a short to battery or a fused ignition feed inadvertently tied in. Repair wiring as required.
  7. Check grounds and related power supplies to the BCM/security module. Repair poor grounds and corroded power feeds.
  8. If wiring and sensors test good, perform module input/output testing per manufacturer procedures. Replace BCM/security module only after confirming wiring and sensors are good.
  9. After repairs, clear codes and perform functional test (arm/disarm system, walk-around test) and confirm code does not return.

Likely causes

  • Short to battery in sensor harness near sensor or splice
  • Corroded connector at sensor causing intermittent high voltage reading
  • Failed sensor pulling data line high
  • Damaged insulation allowing chafe to contact battery feed or constant 12V source
  • Aftermarket device tied into sensor circuit

Fault status

⚠️ Status
Security System Sensor Data Circuit High — sensor data line voltage above allowed threshold; stored when module detects high-voltage condition on security sensor circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

B2957 B2959 B2782 B2797 B2786
406

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

MITSUBISHI

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+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

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