Code
C1118
Generic
C — Chassis
Steering Angle Sensor Circuit Range/Performance
Views:
UK: 0
EN: 1
RU: 0
AI status
Completed
Completed
100%
Causes
- Faulty steering angle sensor (internal failure)
- Damaged or corroded SAS connector or wiring (open, short to ground/power, high resistance)
- Poor ground or intermittent supply voltage to the sensor
- Steering column mechanical fault or sensor misalignment
- Failed or incomplete SAS calibration / learning procedure
- Faulty or interrupted CAN/LIN communication carrying SAS data
Symptoms
- ABS, ESC/traction control warning lamp illuminated
- Steering angle related warnings or degraded power steering behavior
- Loss of stability control or unavailable driver assistance features
- Fault does not clear or returns after clearing codes
- Intermittent faults that correlate with steering movement or road vibration
What to check
- Read freeze frame and live data with a scan tool; note steering angle vs. wheel position
- Check for other related codes (ABS, ESC, CAN bus) and their freeze data
- Visual inspection of SAS connector, wiring harness, and ground points for damage/corrosion
- Verify vehicle battery voltage and charging system while testing
- Attempt SAS calibration/learn procedure per manufacturer procedure and observe behavior
- Wiggle-test connector and wiring while monitoring live SAS output for intermittent changes
Signal parameters
- Typical SAS output: 0.5–4.5 V analog or differential signal depending on design
- Alternate SAS types: digital PWM or CAN/LIN message containing angle (units: degrees)
- Expected output range: full left to full right typically ±720° or manufacturer-specific range; live data should move smoothly with steering
- Update rate: 10–100 Hz for CAN/LIN messages or PWM frequency per manufacturer spec
- Fault indicators: sudden jumps, fixed max/min reading, or no change with steering input
Diagnostic algorithm
- Connect a professional scan tool and record all related codes and freeze frame data. Note steering angle value at rest.
- Clear codes and perform a controlled test: with ignition ON, slowly turn steering from lock to lock while monitoring live steering angle, yaw rate, wheel speed and comparing values for plausibility.
- Perform a visual inspection of SAS connector and wiring from the sensor to the control module. Repair any damaged insulation, pins, or corrosion; ensure secure mating.
- Check power and ground at the sensor connector with multimeter (key ON). Verify proper reference voltage (if applicable) and good ground continuity to chassis.
- If SAS is analog, probe signal with oscilloscope or DMM while steering to confirm smooth voltage change and absence of noise or dropouts.
- If SAS is on CAN/LIN, verify bus integrity: check termination resistances, presence of other nodes, and message stream with a capable scan tool or scope.
- If wiring and bus are good, follow manufacturer procedure to perform SAS calibration/learn with the scan tool. Some codes require a specific steering position and ignition state.
- If the sensor fails bench tests or live data remains out of range after wiring/bus checks and calibration, replace the steering angle sensor and repeat calibration and road test.
- After repair, clear codes and perform a road test with monitoring to confirm the fault does not return and related systems operate normally.
Likely causes
- Connector pin corrosion or loose terminal at SAS
- Broken/chafed wiring between sensor and ABS/BCM/ECU
- Sensor failed after physical impact or long-term wear
- Steering angle sensor not relearned after steering or suspension work
- Blown fuse or poor battery/charging system voltage causing erroneous readings
Fault status
Status
Steering Angle Sensor Circuit Range/Performance — control module detected SAS output outside expected range, inconsistent with other sensors, or failing plausibility checks.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 hours
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Code
C1118
LAND ROVER
C — Chassis
Brake throttle release switch hydraulic pressure
Views:
UK: 6
EN: 8
RU: 7
AI status
Completed
Completed
100%
Causes
- Faulty steering angle sensor (internal failure)
- Damaged or corroded SAS connector or wiring (open, short to ground/power, high resistance)
- Poor ground or intermittent supply voltage to the sensor
- Steering column mechanical fault or sensor misalignment
- Failed or incomplete SAS calibration / learning procedure
- Faulty or interrupted CAN/LIN communication carrying SAS data
Symptoms
- ABS, ESC/traction control warning lamp illuminated
- Steering angle related warnings or degraded power steering behavior
- Loss of stability control or unavailable driver assistance features
- Fault does not clear or returns after clearing codes
- Intermittent faults that correlate with steering movement or road vibration
What to check
- Read freeze frame and live data with a scan tool; note steering angle vs. wheel position
- Check for other related codes (ABS, ESC, CAN bus) and their freeze data
- Visual inspection of SAS connector, wiring harness, and ground points for damage/corrosion
- Verify vehicle battery voltage and charging system while testing
- Attempt SAS calibration/learn procedure per manufacturer procedure and observe behavior
- Wiggle-test connector and wiring while monitoring live SAS output for intermittent changes
Signal parameters
- Typical SAS output: 0.5–4.5 V analog or differential signal depending on design
- Alternate SAS types: digital PWM or CAN/LIN message containing angle (units: degrees)
- Expected output range: full left to full right typically ±720° or manufacturer-specific range; live data should move smoothly with steering
- Update rate: 10–100 Hz for CAN/LIN messages or PWM frequency per manufacturer spec
- Fault indicators: sudden jumps, fixed max/min reading, or no change with steering input
Diagnostic algorithm
- Connect a professional scan tool and record all related codes and freeze frame data. Note steering angle value at rest.
- Clear codes and perform a controlled test: with ignition ON, slowly turn steering from lock to lock while monitoring live steering angle, yaw rate, wheel speed and comparing values for plausibility.
- Perform a visual inspection of SAS connector and wiring from the sensor to the control module. Repair any damaged insulation, pins, or corrosion; ensure secure mating.
- Check power and ground at the sensor connector with multimeter (key ON). Verify proper reference voltage (if applicable) and good ground continuity to chassis.
- If SAS is analog, probe signal with oscilloscope or DMM while steering to confirm smooth voltage change and absence of noise or dropouts.
- If SAS is on CAN/LIN, verify bus integrity: check termination resistances, presence of other nodes, and message stream with a capable scan tool or scope.
- If wiring and bus are good, follow manufacturer procedure to perform SAS calibration/learn with the scan tool. Some codes require a specific steering position and ignition state.
- If the sensor fails bench tests or live data remains out of range after wiring/bus checks and calibration, replace the steering angle sensor and repeat calibration and road test.
- After repair, clear codes and perform a road test with monitoring to confirm the fault does not return and related systems operate normally.
Likely causes
- Connector pin corrosion or loose terminal at SAS
- Broken/chafed wiring between sensor and ABS/BCM/ECU
- Sensor failed after physical impact or long-term wear
- Steering angle sensor not relearned after steering or suspension work
- Blown fuse or poor battery/charging system voltage causing erroneous readings
Fault status
Status
Steering Angle Sensor Circuit Range/Performance — control module detected SAS output outside expected range, inconsistent with other sensors, or failing plausibility checks.
Repair difficulty: Medium
Diagnostic time: 0.5-2.5 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
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