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Home >> Lexus >> 2008 >> IS F >> Repair and Diagnosis >> Steering >> Power Steering >> Power Assist Systems >> Power Steering System >> DTC C1541: Vehicle Speed Signal Malfunction >> Description
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DTC C1541: Vehicle Speed Signal Malfunction: Description

The power steering ECU assembly receives vehicle speed signals from the skid control ECU via CAN communication The ECU provides appropriate assisting force in accordance with the vehicle speed, based on the signals

If the ECU detects this DTC, it adjusts the amount of power assistance for a speed of 100 km/h (62 mph) and continues the system control

DTC DETECTION CONDITION CHART

DTC No DTC Detection Condition Trouble Area
C1541 This DTC is detected when vehicle speed signals via CAN communication are cut off for 3 seconds or more
  • Speed sensor circuit
  • Skid control ECU
  • CAN communication system
  • Power steering ECU assembly
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