C1515

Code

MITSUBISHI C — Chassis

Torque sensor amplifier circuit

Brand: MITSUBISHI

Type: C — Chassis

Views: UK: 22 EN: 25 RU: 11

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Page language: EN

DTC lamp (ABS/ESC/Check Engine) or warning related to torque/traction systems
Reduced system performance or limp/backup mode for systems using torque input
Erratic behavior of traction/stability or steering assist systems
Poor drivability during load changes (hesitation or roughness) if torque input used by engine/TC
Intermittent faults that may come and go with vibration or temperature changes

Read stored and pending codes, record freeze-frame and live data related to torque sensor
Visually inspect wiring harness, connectors and sensor/amplifier for damage, corrosion or water ingress
Check battery voltage and charging system; ensure proper ground connections at chassis and engine
Perform backprobe voltage checks at the sensor/amplifier connector (reference, signal, ground)
Check continuity and for shorts to battery and ground between sensor and control module
Wiggle harness and connectors while monitoring live signal to reproduce intermittent faults

Reference supply (Vref) typically provided by ECU — commonly ~5 V (verify factory spec)
Signal voltage at rest often near mid-supply (example ~2.5 V) and varies with applied torque
Signal should change smoothly with torque input; no abrupt steps, dropouts, or excessive noise
Impedance/ohms between sensor signal and ground should match factory spec (use service manual)
No short to battery voltage or direct short to ground on the signal line

Connect a Mitsubishi-compatible scan tool. Read and record C1515 plus any related codes and freeze-frame data.
Check battery voltage with engine off and running; verify charging system and engine/chassis grounds are clean and tight.
Locate torque sensor and amplifier assembly (refer to service manual). Visually inspect for damage, contamination, or loose connectors.
With ignition on, backprobe connector: measure reference voltage, sensor signal voltage and ground. Compare to factory values. Note any open/short conditions.
Wiggle harness and connectors while watching live data for intermittent changes. If the fault appears when moving wiring, repair harness or connector.
If voltages are incorrect or absent, trace wiring to the ECU and check continuity and for shorts to power/ground. Repair any damaged wiring/solder joints.
If wiring checks OK but signal is out-of-range or noisy, substitute/bench-test the torque sensor/amplifier (if possible) or replace with known-good unit per procedure.
If replacement sensor/amplifier does not clear the fault, test the ECU input circuit or consult wiring diagrams for module-level diagnostics; repair or replace module as directed by manufacturer service information.
After repair, clear codes and perform functional test / road test under conditions that previously produced the fault. Re-scan to confirm C1515 remains cleared.

Damaged wiring harness at steering column or gearbox where torque sensor is located
Connector corrosion or bent pins on the amplifier or control module connector
Failed torque sensor amplifier (internal electronics degraded)
Weak/low battery voltage or poor ground causing incorrect sensor supply
Aftermarket modifications or repairs that disturbed wiring

⚠️ Status

Torque sensor amplifier circuit malfunction — abnormal, open or shorted signal detected. Inspect sensor, amplifier, wiring and related power/ground.

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0-2.5 hours

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C1515 — Torque sensor amplifier circuit