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Home / DTC / B2226 — Right Rear Door Lock/Unlock Switch Stuck in Lock

B2226 — Right Rear Door Lock/Unlock Switch Stuck in Lock

Detailed page for trouble code B2226.

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Code

B2226

HUMMER B — Body

Right Rear Door Lock/Unlock Switch Stuck in Lock

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

Causes

  • Failed or internally shorted right rear door lock/unlock switch
  • Wiring short to power or ground in the right rear door harness
  • Corroded/damaged connector or pins at switch or door harness
  • Right rear door latch/actuator mechanically jammed or seized
  • Water intrusion or contamination in door switch or connector
  • Blown or intermittent fuse or fusible link affecting the circuit

Symptoms

  • Right rear door will not unlock using the interior switch
  • Door may remain locked even when using key fob or master unlock
  • Lock/unlock function may work from other switches but not right rear
  • Intermittent operation or stuck lock position reported by vehicle diagnostics
  • Possible door chime or warning message indicating door locked/unlocked mismatch

What to check

  • Scan vehicle with a capable scan tool and read B2226 and any related codes (U-codes or other B-codes)
  • Visually inspect right rear door switch, connector, and wiring for corrosion, damage, or water intrusion
  • Operate the right rear switch while watching live data or switch state values on the scan tool
  • Check for continuity and resistance across switch terminals with the connector unplugged (compare to spec or matching door switch)
  • Probe switch power and ground with the ignition on: verify expected voltages (battery voltage on supply, proper return/signal change when pressing switch)
  • Check for related diagnostic trouble codes for door module/BCM communication (U-codes)

Signal parameters

  • Ignition ON expected supply: ~10–14 V at switch power terminal
  • Signal when switch idle: near battery voltage or pulled high by BCM — typical 10–14 V (varies by system)
  • Active switch signal: near 0–1 V or change in voltage level depending on circuit (ground-switched or voltage-switched designs)
  • Actuator coil resistance (typical): about 5–30 ohms (varies by actuator) — check manufacturer spec
  • If CAN-controlled, pressing the switch should generate a door-switch message on the bus (check for message and state change using scan tool)
  • No continuous/constant lock-request message should be present when switch is released

Diagnostic algorithm

  1. Retrieve freeze frame and related codes; record current switch state and live data values for the right rear switch.
  2. Perform a visual inspection of the right rear door switch, connector and harness for damage, corrosion, or water — repair any obvious issues.
  3. With connector connected, monitor switch live data while operating the switch. Note whether the data state changes when pressing unlock. If it never changes, suspect switch or wiring.
  4. Verify power and ground at the switch connector with ignition ON. If no power or ground, trace back to fuse/BCM connector.
  5. With connector disconnected, measure switch contact continuity while actuating the switch. If contacts do not change state, replace the switch.
  6. Inspect and test wiring continuity between the switch connector and the BCM/door module. Wiggle the harness around the door hinge while monitoring to detect intermittent opens/shorts.
  7. Bench-test the door lock actuator by applying 12 V and ground to verify it moves freely. If actuator is mechanically seized, repair or replace the latch/actuator assembly.
  8. If switch and wiring test good, verify BCM input and outputs with a scan tool: check for correct messages/commands and reflash BCM software if service bulletins indicate.
  9. After repairs, clear codes and retest all lock/unlock functions multiple times to confirm proper operation and no recurrence of B2226.

Likely causes

  • Faulty right rear door switch (electrical contact stuck)
  • Wiring abrasion or short in the right rear door harness near the hinge/door jamb
  • Corroded connector at the switch or door harness causing a stuck input
  • Mechanically seized door lock actuator preventing normal state change

Fault status

⚠️ Status
Right Rear Door Lock/Unlock Switch Stuck in Lock — BCM detects continuous/stuck lock input from right rear door switch or circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.0 hours
Repair manuals

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Code

B2226

MITSUBISHI B — Body

AND error

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

Causes

  • Failed or internally shorted right rear door lock/unlock switch
  • Wiring short to power or ground in the right rear door harness
  • Corroded/damaged connector or pins at switch or door harness
  • Right rear door latch/actuator mechanically jammed or seized
  • Water intrusion or contamination in door switch or connector
  • Blown or intermittent fuse or fusible link affecting the circuit

Symptoms

  • Right rear door will not unlock using the interior switch
  • Door may remain locked even when using key fob or master unlock
  • Lock/unlock function may work from other switches but not right rear
  • Intermittent operation or stuck lock position reported by vehicle diagnostics
  • Possible door chime or warning message indicating door locked/unlocked mismatch

What to check

  • Scan vehicle with a capable scan tool and read B2226 and any related codes (U-codes or other B-codes)
  • Visually inspect right rear door switch, connector, and wiring for corrosion, damage, or water intrusion
  • Operate the right rear switch while watching live data or switch state values on the scan tool
  • Check for continuity and resistance across switch terminals with the connector unplugged (compare to spec or matching door switch)
  • Probe switch power and ground with the ignition on: verify expected voltages (battery voltage on supply, proper return/signal change when pressing switch)
  • Check for related diagnostic trouble codes for door module/BCM communication (U-codes)

Signal parameters

  • Ignition ON expected supply: ~10–14 V at switch power terminal
  • Signal when switch idle: near battery voltage or pulled high by BCM — typical 10–14 V (varies by system)
  • Active switch signal: near 0–1 V or change in voltage level depending on circuit (ground-switched or voltage-switched designs)
  • Actuator coil resistance (typical): about 5–30 ohms (varies by actuator) — check manufacturer spec
  • If CAN-controlled, pressing the switch should generate a door-switch message on the bus (check for message and state change using scan tool)
  • No continuous/constant lock-request message should be present when switch is released

Diagnostic algorithm

  1. Retrieve freeze frame and related codes; record current switch state and live data values for the right rear switch.
  2. Perform a visual inspection of the right rear door switch, connector and harness for damage, corrosion, or water — repair any obvious issues.
  3. With connector connected, monitor switch live data while operating the switch. Note whether the data state changes when pressing unlock. If it never changes, suspect switch or wiring.
  4. Verify power and ground at the switch connector with ignition ON. If no power or ground, trace back to fuse/BCM connector.
  5. With connector disconnected, measure switch contact continuity while actuating the switch. If contacts do not change state, replace the switch.
  6. Inspect and test wiring continuity between the switch connector and the BCM/door module. Wiggle the harness around the door hinge while monitoring to detect intermittent opens/shorts.
  7. Bench-test the door lock actuator by applying 12 V and ground to verify it moves freely. If actuator is mechanically seized, repair or replace the latch/actuator assembly.
  8. If switch and wiring test good, verify BCM input and outputs with a scan tool: check for correct messages/commands and reflash BCM software if service bulletins indicate.
  9. After repairs, clear codes and retest all lock/unlock functions multiple times to confirm proper operation and no recurrence of B2226.

Likely causes

  • Faulty right rear door switch (electrical contact stuck)
  • Wiring abrasion or short in the right rear door harness near the hinge/door jamb
  • Corroded connector at the switch or door harness causing a stuck input
  • Mechanically seized door lock actuator preventing normal state change

Fault status

⚠️ Status
Right Rear Door Lock/Unlock Switch Stuck in Lock — BCM detects continuous/stuck lock input from right rear door switch or circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.0 hours
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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Code

B2226

Other B — Body

Front Crash Sensor Internal Fault

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

Causes

  • Failed or internally shorted right rear door lock/unlock switch
  • Wiring short to power or ground in the right rear door harness
  • Corroded/damaged connector or pins at switch or door harness
  • Right rear door latch/actuator mechanically jammed or seized
  • Water intrusion or contamination in door switch or connector
  • Blown or intermittent fuse or fusible link affecting the circuit

Symptoms

  • Right rear door will not unlock using the interior switch
  • Door may remain locked even when using key fob or master unlock
  • Lock/unlock function may work from other switches but not right rear
  • Intermittent operation or stuck lock position reported by vehicle diagnostics
  • Possible door chime or warning message indicating door locked/unlocked mismatch

What to check

  • Scan vehicle with a capable scan tool and read B2226 and any related codes (U-codes or other B-codes)
  • Visually inspect right rear door switch, connector, and wiring for corrosion, damage, or water intrusion
  • Operate the right rear switch while watching live data or switch state values on the scan tool
  • Check for continuity and resistance across switch terminals with the connector unplugged (compare to spec or matching door switch)
  • Probe switch power and ground with the ignition on: verify expected voltages (battery voltage on supply, proper return/signal change when pressing switch)
  • Check for related diagnostic trouble codes for door module/BCM communication (U-codes)

Signal parameters

  • Ignition ON expected supply: ~10–14 V at switch power terminal
  • Signal when switch idle: near battery voltage or pulled high by BCM — typical 10–14 V (varies by system)
  • Active switch signal: near 0–1 V or change in voltage level depending on circuit (ground-switched or voltage-switched designs)
  • Actuator coil resistance (typical): about 5–30 ohms (varies by actuator) — check manufacturer spec
  • If CAN-controlled, pressing the switch should generate a door-switch message on the bus (check for message and state change using scan tool)
  • No continuous/constant lock-request message should be present when switch is released

Diagnostic algorithm

  1. Retrieve freeze frame and related codes; record current switch state and live data values for the right rear switch.
  2. Perform a visual inspection of the right rear door switch, connector and harness for damage, corrosion, or water — repair any obvious issues.
  3. With connector connected, monitor switch live data while operating the switch. Note whether the data state changes when pressing unlock. If it never changes, suspect switch or wiring.
  4. Verify power and ground at the switch connector with ignition ON. If no power or ground, trace back to fuse/BCM connector.
  5. With connector disconnected, measure switch contact continuity while actuating the switch. If contacts do not change state, replace the switch.
  6. Inspect and test wiring continuity between the switch connector and the BCM/door module. Wiggle the harness around the door hinge while monitoring to detect intermittent opens/shorts.
  7. Bench-test the door lock actuator by applying 12 V and ground to verify it moves freely. If actuator is mechanically seized, repair or replace the latch/actuator assembly.
  8. If switch and wiring test good, verify BCM input and outputs with a scan tool: check for correct messages/commands and reflash BCM software if service bulletins indicate.
  9. After repairs, clear codes and retest all lock/unlock functions multiple times to confirm proper operation and no recurrence of B2226.

Likely causes

  • Faulty right rear door switch (electrical contact stuck)
  • Wiring abrasion or short in the right rear door harness near the hinge/door jamb
  • Corroded connector at the switch or door harness causing a stuck input
  • Mechanically seized door lock actuator preventing normal state change

Fault status

⚠️ Status
Right Rear Door Lock/Unlock Switch Stuck in Lock — BCM detects continuous/stuck lock input from right rear door switch or circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1.0-2.0 hours
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