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Home / DTC / B2824 — Pump motor TEMP.SNSR:SHT to GND

B2824 — Pump motor TEMP.SNSR:SHT to GND

Detailed page for trouble code B2824.

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Code

B2824

MITSUBISHI B — Body

Pump motor TEMP.SNSR:SHT to GND

Brand: MITSUBISHI
Type: B — Body
AI status
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Page language: EN

Causes

  • Signal wire for the pump motor temperature sensor is shorted to chassis ground.
  • Failed/shorted temperature sensor (internal short).
  • Corroded or damaged connector or pins allowing contact with ground.
  • Chafed wiring harness contacting body or a grounded component.
  • Water intrusion in the connector or harness.
  • Control module (ECU/TCU) internal fault or low-voltage condition.

Symptoms

  • Malfunction Indicator Lamp (MIL) or warning light illuminated.
  • Erroneous pump temperature readings in diagnostic scan data (very low voltage/zero reading).
  • Pump or related system may operate abnormally or be disabled by controller (reduced performance or limp mode).
  • Possible unusual pump run-times or inability to reach proper operating temperature.
  • Intermittent faults if the short is intermittent (depends on moisture/movement).

What to check

  • Read freeze-frame/scan data and note conditions when the code set (engine/pump run state, ambient temperature, voltage).
  • Visually inspect sensor connector and wiring harness for damage, corrosion, heat damage, or water entry.
  • Wiggle the harness and connector while monitoring live data for intermittent changes.
  • With ignition ON (engine OFF), back-probe the sensor connector to measure signal voltage and reference voltage.
  • Perform continuity test between the sensor signal pin and chassis ground with connector disconnected (should not have continuity).
  • Measure sensor resistance with the sensor disconnected from the harness and compare to expected behavior for an NTC thermistor (resistance should not be near zero).

Signal parameters

  • Most pump temp sensors are NTC thermistors: resistance decreases as temperature increases.
  • Typical reference voltage to the sensor is a regulated reference (commonly ~5 V) — confirm with vehicle-specific info before relying on values.
  • Short-to-ground symptom: signal voltage near 0 V or continuity from signal pin to chassis ground.
  • Open-circuit symptom (different code): signal voltage near reference voltage (e.g., ~5 V).
  • Expected sensor resistance varies with temperature and vehicle; consult service data. As a generic check, near 0 ohms indicates a short to ground; very high/OL indicates open.

Diagnostic algorithm

  1. Retrieve and record freeze-frame and live data from a scan tool. Note battery voltage and operating conditions.
  2. Visually inspect the sensor, connector, and wiring along the route from the sensor to the control module for chafing, pin damage, corrosion, or moisture.
  3. With ignition OFF, disconnect the pump motor temperature sensor connector. Inspect pins for corrosion or damage.
  4. With connector disconnected, check continuity between the sensor signal terminal and chassis ground. Continuity (near 0 ohms) indicates a short to ground in wiring or sensor.
  5. Measure the resistance of the sensor itself (sensor removed or disconnected). A near-zero reading suggests an internal short; very high/OL suggests open circuit. Compare to service spec if available.
  6. Reconnect sensor. With ignition ON (engine OFF), back-probe the connector and measure signal voltage and reference voltage. A signal near 0 V indicates short to ground; reference should be stable (~reference voltage).
  7. If wiring is suspected, isolate the harness section: disconnect any intermediate connectors and retest continuity to narrow down location of short. Repair damaged wiring (splice or replace harness) and protect with grommets/conduit.
  8. If sensor and wiring check good but code remains, check the control module input pin for internal short to ground. If module pin is shorted internally, confirm with module-level diagnostics before replacing ECU.
  9. After repair, clear codes and perform a road/test-cycle or operate the pump to confirm code does not return and proper temperature readings are restored.
  10. If intermittent, reproduce conditions (vibration, moisture, temperature change) while monitoring live data to verify repair.

Likely causes

  • Damaged insulation where the sensor signal wire rubs against a grounded bracket or harness conduit.
  • Connector terminal pushed out, bent, or corroded causing a ground short.
  • Sensor element failed and shorted internally to ground.
  • Aftermarket installation or previous repair left wires exposed or misrouted.
  • Intermittent short caused by moisture in the sensor connector.

Fault status

⚠️ Status
Pump motor temperature sensor circuit short to ground detected. Controller recorded abnormally low signal voltage (near 0 V) and set DTC. System may enter fallback or disable pump control until fault is resolved.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

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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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