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Home / DTC / B1206 — Electronic instrument cluster row 1 switch circuit

B1206 — Electronic instrument cluster row 1 switch circuit

Detailed page for trouble code B1206.

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22,491specific
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Code

B1206

ALFA ROMEO B — Body

Electronic instrument cluster row 1 switch circuit

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

Causes

  • Damaged or broken wiring/harness to instrument cluster row 1 switches
  • Poor or corroded connector pins (cluster or switch connector)
  • Failed row 1 switch or switch module
  • Blown fuse or poor power/ground to the cluster or switch circuit
  • Water intrusion or corrosion in switches or connectors
  • Faulty instrument cluster input circuit or internal cluster failure

Symptoms

  • One or more row 1 switches (first row of controls) do not respond or only respond intermittently
  • Switch backlighting or indicator associated with row 1 may not light
  • Related functions controlled by row 1 switches do not operate
  • Instrument cluster may log multiple related body/cluster communication faults
  • Symptoms may change with vibration, temperature or movement of the harness

What to check

  • Retrieve fault codes and freeze-frame data with a diagnostic scanner; record occurrences and time stamps
  • Check for related codes (CAN/LIN communication or other cluster B-codes) and clear then re-scan to reproduce
  • Visually inspect connectors and wiring at the instrument cluster and row 1 switch area for corrosion, damage, or signs of water ingress
  • Verify battery voltage and ground quality at the cluster (engine off and on)
  • Check relevant fuses and relays for continuity and correct rating
  • Perform a wiggle test on wiring and connectors while observing scanner live data or watching for code reappearance

Signal parameters

  • Battery supply to cluster/switch: ~11–14 V (with engine off/engine running as applicable)
  • Reference/pull-up logic supply often ~5 V for switch inputs (vehicle-specific)
  • Switch closed continuity: near 0 Ω; switch open: very high/OL
  • Ground resistance at cluster:
  • CAN bus idle voltages (typical): CAN_H ~2.5–3.5 V, CAN_L ~1.0–1.5 V (differential ≈2.5 V) — verify against manufacturer spec
  • LIN bus (if used) idle ~battery voltage or sleep voltage; active pulses per manufacturer spec

Diagnostic algorithm

  1. Confirm B1206 present; note whether persistent or intermittent. Clear codes and attempt to re-create.
  2. Check battery voltage and main ground at the instrument cluster; correct any poor battery/ground connections.
  3. Inspect fuses and relays related to instrument cluster and row 1 switches; replace if suspect.
  4. Visually inspect and disconnect the instrument cluster and switch connectors; look for bent pins, corrosion, or water damage. Repair or clean connectors as required.
  5. Using wiring diagrams, identify the row 1 switch circuit wires. Perform continuity and short-to-ground/short-to-voltage tests between switch, connector and cluster pins.
  6. Backprobe the switch/cluster connector and measure supply, reference and switch signal while operating the switch. Compare values to expected signal_params.
  7. If vehicle uses CAN/LIN for switch data, verify bus health (check termination, measure bus voltages, look for other modules reporting errors).
  8. If wiring and power/ground are good but fault persists, bench-test or substitute a known-good switch module if available.
  9. If substitute switch does not clear the fault, consider instrument cluster internal failure. Consult manufacturer service info for cluster replacement or reprogramming. Check for software updates or TSBs.
  10. After repairs, clear codes and test drive/operate switches to confirm the fault does not return.

Likely causes

  • Corroded connector at instrument cluster or switch assembly
  • Open/short in the harness due to chafing or previous repair
  • Failed switch contacts within the row 1 switch assembly
  • Missing or intermittent ground at cluster
  • Intermittent cluster electronics or internal damage from moisture

Fault status

⚠️ Status
Instrument cluster reports a fault in the row 1 switch circuit (open/short/intermittent). Inspect wiring, connectors, switches and cluster inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B1200 B1201 B1202 B1213 U0100 U0140
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Code

B1206

FIAT B — Body

Electronic instrument cluster row 1 switch circuit

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

Causes

  • Damaged or broken wiring/harness to instrument cluster row 1 switches
  • Poor or corroded connector pins (cluster or switch connector)
  • Failed row 1 switch or switch module
  • Blown fuse or poor power/ground to the cluster or switch circuit
  • Water intrusion or corrosion in switches or connectors
  • Faulty instrument cluster input circuit or internal cluster failure

Symptoms

  • One or more row 1 switches (first row of controls) do not respond or only respond intermittently
  • Switch backlighting or indicator associated with row 1 may not light
  • Related functions controlled by row 1 switches do not operate
  • Instrument cluster may log multiple related body/cluster communication faults
  • Symptoms may change with vibration, temperature or movement of the harness

What to check

  • Retrieve fault codes and freeze-frame data with a diagnostic scanner; record occurrences and time stamps
  • Check for related codes (CAN/LIN communication or other cluster B-codes) and clear then re-scan to reproduce
  • Visually inspect connectors and wiring at the instrument cluster and row 1 switch area for corrosion, damage, or signs of water ingress
  • Verify battery voltage and ground quality at the cluster (engine off and on)
  • Check relevant fuses and relays for continuity and correct rating
  • Perform a wiggle test on wiring and connectors while observing scanner live data or watching for code reappearance

Signal parameters

  • Battery supply to cluster/switch: ~11–14 V (with engine off/engine running as applicable)
  • Reference/pull-up logic supply often ~5 V for switch inputs (vehicle-specific)
  • Switch closed continuity: near 0 Ω; switch open: very high/OL
  • Ground resistance at cluster:
  • CAN bus idle voltages (typical): CAN_H ~2.5–3.5 V, CAN_L ~1.0–1.5 V (differential ≈2.5 V) — verify against manufacturer spec
  • LIN bus (if used) idle ~battery voltage or sleep voltage; active pulses per manufacturer spec

Diagnostic algorithm

  1. Confirm B1206 present; note whether persistent or intermittent. Clear codes and attempt to re-create.
  2. Check battery voltage and main ground at the instrument cluster; correct any poor battery/ground connections.
  3. Inspect fuses and relays related to instrument cluster and row 1 switches; replace if suspect.
  4. Visually inspect and disconnect the instrument cluster and switch connectors; look for bent pins, corrosion, or water damage. Repair or clean connectors as required.
  5. Using wiring diagrams, identify the row 1 switch circuit wires. Perform continuity and short-to-ground/short-to-voltage tests between switch, connector and cluster pins.
  6. Backprobe the switch/cluster connector and measure supply, reference and switch signal while operating the switch. Compare values to expected signal_params.
  7. If vehicle uses CAN/LIN for switch data, verify bus health (check termination, measure bus voltages, look for other modules reporting errors).
  8. If wiring and power/ground are good but fault persists, bench-test or substitute a known-good switch module if available.
  9. If substitute switch does not clear the fault, consider instrument cluster internal failure. Consult manufacturer service info for cluster replacement or reprogramming. Check for software updates or TSBs.
  10. After repairs, clear codes and test drive/operate switches to confirm the fault does not return.

Likely causes

  • Corroded connector at instrument cluster or switch assembly
  • Open/short in the harness due to chafing or previous repair
  • Failed switch contacts within the row 1 switch assembly
  • Missing or intermittent ground at cluster
  • Intermittent cluster electronics or internal damage from moisture

Fault status

⚠️ Status
Instrument cluster reports a fault in the row 1 switch circuit (open/short/intermittent). Inspect wiring, connectors, switches and cluster inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B1200 B1201 B1202 B1213 U0100 U0140
Repair manuals

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Code

B1206

LAND ROVER B — Body

An event occurred collision

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

Causes

  • Damaged or broken wiring/harness to instrument cluster row 1 switches
  • Poor or corroded connector pins (cluster or switch connector)
  • Failed row 1 switch or switch module
  • Blown fuse or poor power/ground to the cluster or switch circuit
  • Water intrusion or corrosion in switches or connectors
  • Faulty instrument cluster input circuit or internal cluster failure

Symptoms

  • One or more row 1 switches (first row of controls) do not respond or only respond intermittently
  • Switch backlighting or indicator associated with row 1 may not light
  • Related functions controlled by row 1 switches do not operate
  • Instrument cluster may log multiple related body/cluster communication faults
  • Symptoms may change with vibration, temperature or movement of the harness

What to check

  • Retrieve fault codes and freeze-frame data with a diagnostic scanner; record occurrences and time stamps
  • Check for related codes (CAN/LIN communication or other cluster B-codes) and clear then re-scan to reproduce
  • Visually inspect connectors and wiring at the instrument cluster and row 1 switch area for corrosion, damage, or signs of water ingress
  • Verify battery voltage and ground quality at the cluster (engine off and on)
  • Check relevant fuses and relays for continuity and correct rating
  • Perform a wiggle test on wiring and connectors while observing scanner live data or watching for code reappearance

Signal parameters

  • Battery supply to cluster/switch: ~11–14 V (with engine off/engine running as applicable)
  • Reference/pull-up logic supply often ~5 V for switch inputs (vehicle-specific)
  • Switch closed continuity: near 0 Ω; switch open: very high/OL
  • Ground resistance at cluster:
  • CAN bus idle voltages (typical): CAN_H ~2.5–3.5 V, CAN_L ~1.0–1.5 V (differential ≈2.5 V) — verify against manufacturer spec
  • LIN bus (if used) idle ~battery voltage or sleep voltage; active pulses per manufacturer spec

Diagnostic algorithm

  1. Confirm B1206 present; note whether persistent or intermittent. Clear codes and attempt to re-create.
  2. Check battery voltage and main ground at the instrument cluster; correct any poor battery/ground connections.
  3. Inspect fuses and relays related to instrument cluster and row 1 switches; replace if suspect.
  4. Visually inspect and disconnect the instrument cluster and switch connectors; look for bent pins, corrosion, or water damage. Repair or clean connectors as required.
  5. Using wiring diagrams, identify the row 1 switch circuit wires. Perform continuity and short-to-ground/short-to-voltage tests between switch, connector and cluster pins.
  6. Backprobe the switch/cluster connector and measure supply, reference and switch signal while operating the switch. Compare values to expected signal_params.
  7. If vehicle uses CAN/LIN for switch data, verify bus health (check termination, measure bus voltages, look for other modules reporting errors).
  8. If wiring and power/ground are good but fault persists, bench-test or substitute a known-good switch module if available.
  9. If substitute switch does not clear the fault, consider instrument cluster internal failure. Consult manufacturer service info for cluster replacement or reprogramming. Check for software updates or TSBs.
  10. After repairs, clear codes and test drive/operate switches to confirm the fault does not return.

Likely causes

  • Corroded connector at instrument cluster or switch assembly
  • Open/short in the harness due to chafing or previous repair
  • Failed switch contacts within the row 1 switch assembly
  • Missing or intermittent ground at cluster
  • Intermittent cluster electronics or internal damage from moisture

Fault status

⚠️ Status
Instrument cluster reports a fault in the row 1 switch circuit (open/short/intermittent). Inspect wiring, connectors, switches and cluster inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B1200 B1201 B1202 B1213 U0100 U0140
320

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Code

B1206

MITSUBISHI B — Body

PS.ABG indicator circuit open

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

Causes

  • Damaged or broken wiring/harness to instrument cluster row 1 switches
  • Poor or corroded connector pins (cluster or switch connector)
  • Failed row 1 switch or switch module
  • Blown fuse or poor power/ground to the cluster or switch circuit
  • Water intrusion or corrosion in switches or connectors
  • Faulty instrument cluster input circuit or internal cluster failure

Symptoms

  • One or more row 1 switches (first row of controls) do not respond or only respond intermittently
  • Switch backlighting or indicator associated with row 1 may not light
  • Related functions controlled by row 1 switches do not operate
  • Instrument cluster may log multiple related body/cluster communication faults
  • Symptoms may change with vibration, temperature or movement of the harness

What to check

  • Retrieve fault codes and freeze-frame data with a diagnostic scanner; record occurrences and time stamps
  • Check for related codes (CAN/LIN communication or other cluster B-codes) and clear then re-scan to reproduce
  • Visually inspect connectors and wiring at the instrument cluster and row 1 switch area for corrosion, damage, or signs of water ingress
  • Verify battery voltage and ground quality at the cluster (engine off and on)
  • Check relevant fuses and relays for continuity and correct rating
  • Perform a wiggle test on wiring and connectors while observing scanner live data or watching for code reappearance

Signal parameters

  • Battery supply to cluster/switch: ~11–14 V (with engine off/engine running as applicable)
  • Reference/pull-up logic supply often ~5 V for switch inputs (vehicle-specific)
  • Switch closed continuity: near 0 Ω; switch open: very high/OL
  • Ground resistance at cluster:
  • CAN bus idle voltages (typical): CAN_H ~2.5–3.5 V, CAN_L ~1.0–1.5 V (differential ≈2.5 V) — verify against manufacturer spec
  • LIN bus (if used) idle ~battery voltage or sleep voltage; active pulses per manufacturer spec

Diagnostic algorithm

  1. Confirm B1206 present; note whether persistent or intermittent. Clear codes and attempt to re-create.
  2. Check battery voltage and main ground at the instrument cluster; correct any poor battery/ground connections.
  3. Inspect fuses and relays related to instrument cluster and row 1 switches; replace if suspect.
  4. Visually inspect and disconnect the instrument cluster and switch connectors; look for bent pins, corrosion, or water damage. Repair or clean connectors as required.
  5. Using wiring diagrams, identify the row 1 switch circuit wires. Perform continuity and short-to-ground/short-to-voltage tests between switch, connector and cluster pins.
  6. Backprobe the switch/cluster connector and measure supply, reference and switch signal while operating the switch. Compare values to expected signal_params.
  7. If vehicle uses CAN/LIN for switch data, verify bus health (check termination, measure bus voltages, look for other modules reporting errors).
  8. If wiring and power/ground are good but fault persists, bench-test or substitute a known-good switch module if available.
  9. If substitute switch does not clear the fault, consider instrument cluster internal failure. Consult manufacturer service info for cluster replacement or reprogramming. Check for software updates or TSBs.
  10. After repairs, clear codes and test drive/operate switches to confirm the fault does not return.

Likely causes

  • Corroded connector at instrument cluster or switch assembly
  • Open/short in the harness due to chafing or previous repair
  • Failed switch contacts within the row 1 switch assembly
  • Missing or intermittent ground at cluster
  • Intermittent cluster electronics or internal damage from moisture

Fault status

⚠️ Status
Instrument cluster reports a fault in the row 1 switch circuit (open/short/intermittent). Inspect wiring, connectors, switches and cluster inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B1200 B1201 B1202 B1213 U0100 U0140
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.
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Code

B1206

Other B — Body

EIC Switch-1 Assembly Circuit Open

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

Causes

  • Damaged or broken wiring/harness to instrument cluster row 1 switches
  • Poor or corroded connector pins (cluster or switch connector)
  • Failed row 1 switch or switch module
  • Blown fuse or poor power/ground to the cluster or switch circuit
  • Water intrusion or corrosion in switches or connectors
  • Faulty instrument cluster input circuit or internal cluster failure

Symptoms

  • One or more row 1 switches (first row of controls) do not respond or only respond intermittently
  • Switch backlighting or indicator associated with row 1 may not light
  • Related functions controlled by row 1 switches do not operate
  • Instrument cluster may log multiple related body/cluster communication faults
  • Symptoms may change with vibration, temperature or movement of the harness

What to check

  • Retrieve fault codes and freeze-frame data with a diagnostic scanner; record occurrences and time stamps
  • Check for related codes (CAN/LIN communication or other cluster B-codes) and clear then re-scan to reproduce
  • Visually inspect connectors and wiring at the instrument cluster and row 1 switch area for corrosion, damage, or signs of water ingress
  • Verify battery voltage and ground quality at the cluster (engine off and on)
  • Check relevant fuses and relays for continuity and correct rating
  • Perform a wiggle test on wiring and connectors while observing scanner live data or watching for code reappearance

Signal parameters

  • Battery supply to cluster/switch: ~11–14 V (with engine off/engine running as applicable)
  • Reference/pull-up logic supply often ~5 V for switch inputs (vehicle-specific)
  • Switch closed continuity: near 0 Ω; switch open: very high/OL
  • Ground resistance at cluster:
  • CAN bus idle voltages (typical): CAN_H ~2.5–3.5 V, CAN_L ~1.0–1.5 V (differential ≈2.5 V) — verify against manufacturer spec
  • LIN bus (if used) idle ~battery voltage or sleep voltage; active pulses per manufacturer spec

Diagnostic algorithm

  1. Confirm B1206 present; note whether persistent or intermittent. Clear codes and attempt to re-create.
  2. Check battery voltage and main ground at the instrument cluster; correct any poor battery/ground connections.
  3. Inspect fuses and relays related to instrument cluster and row 1 switches; replace if suspect.
  4. Visually inspect and disconnect the instrument cluster and switch connectors; look for bent pins, corrosion, or water damage. Repair or clean connectors as required.
  5. Using wiring diagrams, identify the row 1 switch circuit wires. Perform continuity and short-to-ground/short-to-voltage tests between switch, connector and cluster pins.
  6. Backprobe the switch/cluster connector and measure supply, reference and switch signal while operating the switch. Compare values to expected signal_params.
  7. If vehicle uses CAN/LIN for switch data, verify bus health (check termination, measure bus voltages, look for other modules reporting errors).
  8. If wiring and power/ground are good but fault persists, bench-test or substitute a known-good switch module if available.
  9. If substitute switch does not clear the fault, consider instrument cluster internal failure. Consult manufacturer service info for cluster replacement or reprogramming. Check for software updates or TSBs.
  10. After repairs, clear codes and test drive/operate switches to confirm the fault does not return.

Likely causes

  • Corroded connector at instrument cluster or switch assembly
  • Open/short in the harness due to chafing or previous repair
  • Failed switch contacts within the row 1 switch assembly
  • Missing or intermittent ground at cluster
  • Intermittent cluster electronics or internal damage from moisture

Fault status

⚠️ Status
Instrument cluster reports a fault in the row 1 switch circuit (open/short/intermittent). Inspect wiring, connectors, switches and cluster inputs.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 1-3 hours

Similar codes

B1200 B1201 B1202 B1213 U0100 U0140
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