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Home / DTC / B2346 — Open circuit in a positive reference power source in tension

B2346 — Open circuit in a positive reference power source in tension

Detailed page for trouble code B2346.

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Code

B2346

LAND ROVER B — Body

Open circuit in a positive reference power source in tension

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

Causes

  • Open or broken wiring in the positive reference/power feed circuit
  • Disconnected, corroded or damaged connector/terminal at the sensor or module
  • Blown fuse or faulty fusible link supplying the reference circuit
  • Faulty sensor or actuator with internal open
  • Faulty control/module driving or monitoring the reference
  • Water ingress or corrosion in connectors causing intermittent open

Symptoms

  • Associated system or component inoperative or intermittent
  • Related warning lamp or message illuminated on dash
  • Stored or recurring B2346 code after clearing
  • Vehicle may enter limp/limited‑function mode if a safety circuit is affected
  • No or incorrect sensor/actuator readings shown in diagnostic tool

What to check

  • Confirm battery voltage is nominal (12.0–14.5 V) before testing
  • Check vehicle-specific wiring diagram to identify the exact reference feed and affected component(s)
  • Inspect related fuses and fusible links for continuity and correct rating
  • Visually inspect connectors and harness along the circuit for damage, corrosion, or water ingress
  • Use a scan tool to confirm the code, freeze frame data and related codes
  • Backprobe the sensor/actuator connector while key ON to verify presence or absence of reference voltage

Signal parameters

  • Expected positive reference voltage: typically ~5 V (consult vehicle wiring diagram for exact value)
  • With key ON (engine OFF): reference circuit should show steady reference voltage, not open-circuit
  • Open circuit result: near 0 V or intermittent/no reading at the sensor connector
  • No excessive current draw expected on the reference feed under normal conditions
  • Continuity between module power output pin and connector pin should be near 0 Ω (allowing for connector resistance)

Diagnostic algorithm

  1. Retrieve freeze frame and all stored codes; note related/subordinate codes.
  2. Consult the specific Land Rover wiring diagram to identify the module, connector pin and fuse for the positive reference circuit.
  3. Visually inspect connectors, pins and harness along the entire circuit for damage, corrosion, or loose terminals.
  4. Check and verify fuse/fusible link continuity and replace if blown; test after replacement.
  5. With key ON (engine OFF), backprobe the sensor/actuator reference pin and check for expected reference voltage. If present at module and not at sensor, suspect wiring/connector between them.
  6. If voltage is absent at the module output pin, check continuity from the module connector to the supply/fuse and back to battery positive; repair any open circuit.
  7. If voltage is present at the module output but not at the sensor, inspect and repair wiring and connectors between module and sensor; perform wiggle test to find intermittent opens.
  8. If wiring and connectors are good but sensor shows open internally, replace the sensor/actuator and retest.
  9. If wiring, fuse and sensor check good, consider module fault—verify power/ground to the module and reprogram/replace module only after confirming external circuit integrity.
  10. After repairs, clear codes and perform a functional test and short road test to confirm the fault does not return.

Likely causes

  • Damaged harness insulation or chafed wire resulting in an open
  • Loose or pushed‑out terminal at a multi‑pin connector
  • Blown fuse for the reference circuit
  • Aftermarket fitting or repair connector with poor crimp causing open
  • Failed sensor or actuator internal wiring

Fault status

⚠️ Status
Open circuit detected in the positive reference/power feed for a monitored sensor or actuator. The control module does not see the expected reference voltage; check fuses, connectors, wiring and the component for an open circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

Similar codes

B2345 B2347 B2348 B2349 B1234
320

Browse 320 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

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Code

B2346

Other B — Body

Mirror Switch Reference Voltage Positive Common Open Circuit

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

Causes

  • Open or broken wiring in the positive reference/power feed circuit
  • Disconnected, corroded or damaged connector/terminal at the sensor or module
  • Blown fuse or faulty fusible link supplying the reference circuit
  • Faulty sensor or actuator with internal open
  • Faulty control/module driving or monitoring the reference
  • Water ingress or corrosion in connectors causing intermittent open

Symptoms

  • Associated system or component inoperative or intermittent
  • Related warning lamp or message illuminated on dash
  • Stored or recurring B2346 code after clearing
  • Vehicle may enter limp/limited‑function mode if a safety circuit is affected
  • No or incorrect sensor/actuator readings shown in diagnostic tool

What to check

  • Confirm battery voltage is nominal (12.0–14.5 V) before testing
  • Check vehicle-specific wiring diagram to identify the exact reference feed and affected component(s)
  • Inspect related fuses and fusible links for continuity and correct rating
  • Visually inspect connectors and harness along the circuit for damage, corrosion, or water ingress
  • Use a scan tool to confirm the code, freeze frame data and related codes
  • Backprobe the sensor/actuator connector while key ON to verify presence or absence of reference voltage

Signal parameters

  • Expected positive reference voltage: typically ~5 V (consult vehicle wiring diagram for exact value)
  • With key ON (engine OFF): reference circuit should show steady reference voltage, not open-circuit
  • Open circuit result: near 0 V or intermittent/no reading at the sensor connector
  • No excessive current draw expected on the reference feed under normal conditions
  • Continuity between module power output pin and connector pin should be near 0 Ω (allowing for connector resistance)

Diagnostic algorithm

  1. Retrieve freeze frame and all stored codes; note related/subordinate codes.
  2. Consult the specific Land Rover wiring diagram to identify the module, connector pin and fuse for the positive reference circuit.
  3. Visually inspect connectors, pins and harness along the entire circuit for damage, corrosion, or loose terminals.
  4. Check and verify fuse/fusible link continuity and replace if blown; test after replacement.
  5. With key ON (engine OFF), backprobe the sensor/actuator reference pin and check for expected reference voltage. If present at module and not at sensor, suspect wiring/connector between them.
  6. If voltage is absent at the module output pin, check continuity from the module connector to the supply/fuse and back to battery positive; repair any open circuit.
  7. If voltage is present at the module output but not at the sensor, inspect and repair wiring and connectors between module and sensor; perform wiggle test to find intermittent opens.
  8. If wiring and connectors are good but sensor shows open internally, replace the sensor/actuator and retest.
  9. If wiring, fuse and sensor check good, consider module fault—verify power/ground to the module and reprogram/replace module only after confirming external circuit integrity.
  10. After repairs, clear codes and perform a functional test and short road test to confirm the fault does not return.

Likely causes

  • Damaged harness insulation or chafed wire resulting in an open
  • Loose or pushed‑out terminal at a multi‑pin connector
  • Blown fuse for the reference circuit
  • Aftermarket fitting or repair connector with poor crimp causing open
  • Failed sensor or actuator internal wiring

Fault status

⚠️ Status
Open circuit detected in the positive reference/power feed for a monitored sensor or actuator. The control module does not see the expected reference voltage; check fuses, connectors, wiring and the component for an open circuit.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5 - 2.0 hours

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