Fail-Safe Chart [04/2013 - 10/2016]
WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 Lexus IS 350, 2016 Lexus IS 300, 2016 Lexus IS 200t, 2015 Lexus IS 350, and 2015 Lexus IS 250. However, it is still accessible from the selected car via links, so may be relevant.
- FAIL-SAFE FUNCTION
- The VGRS ECU (front steering control ECU) performs fail-safe control according to the chart below when a malfunction occurs in the VGRS system.
VGRS SYSTEMDTC Code Detection Condition Fail-safe Operation C1591/51 Actuator Neutral Position Calibration Undone Control is not started C1592/52 Actuator Neutral Position Calibration Incomplete Control is not started C1593/53 Actuator Standard Position Control is not started C1595/55 Lost Communication with Steering Angle Sensor Module(SIL) Returns the relative angle to the neutral position and stops or stops at the current position C15A1/61 Short in Motor Circuit Control is not started or stops C15A2/62 Open in Motor Circuit Control is not started or stops C15A3/63 Motor Rotation Angle Not Detected Control is not started C15A4/64 Motor Rotation Angle Malfunction Control is not stopped C15A5/65 Lock Mechanism Circuit Control is not started or stops C15A6/62 Actuator Motor Power Distribution Malfunction Control is not started or stops C15A9/66 Lock Holder Deviation Detection Control is not started or stops C15AA/66 Lock Mechanism Release Incomplete Control is not stopped C15AB/66 Lock Mechanism Insertion Control is not started or stops C15B1/71 ECU Malfunction(CPU) Control is not started or stops C15B2/72 ECU Malfunction (Internal Line) Control is not started or stops C15B3/73 ECU Malfunction (Substrate Temperature Sensor) Control continues C15B4/71 ECU Malfunction (Actuator Angle Record) Control is not started or stops C15B5/82 ECU Malfunction (Flash Memory) Control is not started or stops C15B6/83 ECU Malfunction (EEPROM) Control is not started or stops C15C1/74 Steering Angle Sensor Control is not started or stops C15C2/74 Steering Angle Sensor B+ Returns the relative angle to the neutral position and stops C15C3/75 Brake System Control Module Returns the relative angle to the neutral position and stops C15C4/68 Steering Signal Not Detected - C15C5/69 Motor Rotation Signal Not Detected - C15C6/77 IG Power Supply Voltage Returns the relative angle to the neutral position and stops C15C7/78 DC Motor Power Source Voltage Control is not started or stops C15C8/79 Power Supply Relay Failure Control is not started C15CA/79 EPS System Malfunction Returns the relative angle to the neutral position and stops C15CB/84 VSC System Malfunction Returns the relative angle to the neutral position and stops U0100/56 Lost Communication with ECM/PCM "A" Control is not started U0101/56 Lost Communication with TCM Returns the relative angle to the neutral position and stops U0125/56 Lost Communication with Yaw Rate Sensor Module Control continues U0126/56 Lost Communication with Steering Angle Sensor Module Returns the relative angle to the neutral position and stops U0129/56 Lost Communication with Brake System Control Module Returns the relative angle to the neutral position and stops U0131/56 Lost Communication with Power Steering Control Module Returns the relative angle to the neutral position and stops