Code
C2002
Generic
C — Chassis
Steering Angle Sensor Circuit Fault
Views:
UK: 0
EN: 1
RU: 1
AI status
Completed
Completed
100%
Causes
- Open, short, or high-resistance wiring between the SAS and control module
- Corroded or loose connector (power, ground, signal)
- Failed steering angle sensor or internal electronics
- Clock spring damage or wiring chafed in the steering column
- Loss of reference voltage or ground at the sensor
- Module communication fault (CAN/LIN) or module software issue
Symptoms
- ABS, ESC/ESP, or traction control warning lamp(s) illuminated
- Steering angle reading incorrect or not updating in scan tool
- Loss of stability control or limited ABS/traction functionality
- Possible airbag/side system warnings (on vehicles using SAS data)
- Intermittent faults that may clear on restart or after driving
- Steering wheel centering/calibration issues reported during service
What to check
- Read and record freeze frame and all stored codes; note related ABS/ESP/SRS or communication codes
- Check live data: steering wheel angle, torque sensor, wheel speeds, yaw rate; compare expected response when turning wheel
- Visually inspect connectors, harness routing through steering column and clock spring for damage or corrosion
- Measure reference voltage (typically ~5V) and ground at the sensor connector with key on
- Backprobe signal wire while rotating steering wheel to confirm changing signal (voltage or CAN packets)
- Perform wiggle tests on harness/clock spring while watching live data for intermittent drops
Signal parameters
- Reference voltage typically 5V (some systems 3.3V) — verify against manufacturer data
- Signal type: analog voltage (0–5V) or digital encoder/CAN message depending on vehicle
- Centered steering wheel often produces a mid-scale voltage (~2.5V) on analog sensors
- Angular range may be large (±360° to ±720° total rotation) on digital sensors
- Update rate typically between 10–100 Hz for direct sensor outputs or periodic CAN messages
- Expected smooth, monotonic change in voltage/angle as wheel is rotated; no sudden jumps/dropouts
Diagnostic algorithm
- Retrieve all codes and vehicle-specific freeze frame data. Note related ABS/ESP/SRS and communication codes.
- Verify vehicle is secure, wheels chocked, ignition on (engine off for many tests). Confirm steering wheel is centered for initial checks.
- Visually inspect the SAS connector(s), harness through the column, and clock spring. Repair any obvious damage/corrosion.
- Backprobe sensor connector: confirm reference voltage and ground present with key on. If missing, trace and repair power/ground circuit.
- Monitor steering angle signal with a scan tool while slowly rotating the steering wheel. Look for smooth, continuous changes; check for dropouts or erratic jumps.
- If analog, measure signal voltage at multiple wheel positions. If digital/CAN, monitor message existence and contents using a high‑quality scanner or oscilloscope/CAN logger.
- Perform wiggle tests on harness/clock spring while observing live data to find intermittent faults. Repair/replace wiring or clock spring if intermittent behavior occurs.
- If wiring and connectors are good but signal is out of range or inconsistent, replace the steering angle sensor and recheck.
- After any replacement or if vehicle reports SAS not calibrated, perform manufacturer SAS calibration/centering procedure with a scan tool per service manual.
- Clear codes, verify repair by test drive and re-scan for reappearance. If code returns, follow manufacturer-specific advanced diagnostics (scope waveforms, module bench tests).
- If all circuits and sensor tests pass, consider module fault or software; consult service bulletins and consider module reflash or replacement as directed.
Likely causes
- Damaged connector or wiring at steering column (most common)
- Faulty steering angle sensor or its internal potentiometer/encoder
- Clock spring wiring fault affecting sensor signals
- Missing/incorrect SAS calibration after component replacement
- Intermittent ground or 5V reference supply
Fault status
Status
Steering Angle Sensor Circuit Fault — signal missing, out of range, intermittent, or invalid. Stability/ABS functions may be limited until resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Code
C2002
LAND ROVER
C — Chassis
Front Left Suspension Height Sensor Circuit — Signal Fault
Views:
UK: 10
EN: 17
RU: 14
AI status
Completed
Completed
100%
Causes
- Open, short, or high-resistance wiring between the SAS and control module
- Corroded or loose connector (power, ground, signal)
- Failed steering angle sensor or internal electronics
- Clock spring damage or wiring chafed in the steering column
- Loss of reference voltage or ground at the sensor
- Module communication fault (CAN/LIN) or module software issue
Symptoms
- ABS, ESC/ESP, or traction control warning lamp(s) illuminated
- Steering angle reading incorrect or not updating in scan tool
- Loss of stability control or limited ABS/traction functionality
- Possible airbag/side system warnings (on vehicles using SAS data)
- Intermittent faults that may clear on restart or after driving
- Steering wheel centering/calibration issues reported during service
What to check
- Read and record freeze frame and all stored codes; note related ABS/ESP/SRS or communication codes
- Check live data: steering wheel angle, torque sensor, wheel speeds, yaw rate; compare expected response when turning wheel
- Visually inspect connectors, harness routing through steering column and clock spring for damage or corrosion
- Measure reference voltage (typically ~5V) and ground at the sensor connector with key on
- Backprobe signal wire while rotating steering wheel to confirm changing signal (voltage or CAN packets)
- Perform wiggle tests on harness/clock spring while watching live data for intermittent drops
Signal parameters
- Reference voltage typically 5V (some systems 3.3V) — verify against manufacturer data
- Signal type: analog voltage (0–5V) or digital encoder/CAN message depending on vehicle
- Centered steering wheel often produces a mid-scale voltage (~2.5V) on analog sensors
- Angular range may be large (±360° to ±720° total rotation) on digital sensors
- Update rate typically between 10–100 Hz for direct sensor outputs or periodic CAN messages
- Expected smooth, monotonic change in voltage/angle as wheel is rotated; no sudden jumps/dropouts
Diagnostic algorithm
- Retrieve all codes and vehicle-specific freeze frame data. Note related ABS/ESP/SRS and communication codes.
- Verify vehicle is secure, wheels chocked, ignition on (engine off for many tests). Confirm steering wheel is centered for initial checks.
- Visually inspect the SAS connector(s), harness through the column, and clock spring. Repair any obvious damage/corrosion.
- Backprobe sensor connector: confirm reference voltage and ground present with key on. If missing, trace and repair power/ground circuit.
- Monitor steering angle signal with a scan tool while slowly rotating the steering wheel. Look for smooth, continuous changes; check for dropouts or erratic jumps.
- If analog, measure signal voltage at multiple wheel positions. If digital/CAN, monitor message existence and contents using a high‑quality scanner or oscilloscope/CAN logger.
- Perform wiggle tests on harness/clock spring while observing live data to find intermittent faults. Repair/replace wiring or clock spring if intermittent behavior occurs.
- If wiring and connectors are good but signal is out of range or inconsistent, replace the steering angle sensor and recheck.
- After any replacement or if vehicle reports SAS not calibrated, perform manufacturer SAS calibration/centering procedure with a scan tool per service manual.
- Clear codes, verify repair by test drive and re-scan for reappearance. If code returns, follow manufacturer-specific advanced diagnostics (scope waveforms, module bench tests).
- If all circuits and sensor tests pass, consider module fault or software; consult service bulletins and consider module reflash or replacement as directed.
Likely causes
- Damaged connector or wiring at steering column (most common)
- Faulty steering angle sensor or its internal potentiometer/encoder
- Clock spring wiring fault affecting sensor signals
- Missing/incorrect SAS calibration after component replacement
- Intermittent ground or 5V reference supply
Fault status
Status
Steering Angle Sensor Circuit Fault — signal missing, out of range, intermittent, or invalid. Stability/ABS functions may be limited until resolved.
Repair difficulty: Medium
Diagnostic time: 1-3 hours
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Land Rover Defender 300Tdi — Workshop Manual (1996 model year)
Workshop Manual199,00 UAH
Land Rover Defender Workshop Manual Supplement & Body Repair Manual (1999 & 2002 MY)
Workshop Manual199,00 UAH
Land Rover Range Rover — Electrical Library (LRL 0453ENG, 2002)
Workshop Manual199,00 UAH
Your experience will help others
+100 karma for a short comment :)
Was this AI description helpful?
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