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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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DTC U0001:88/U0100:00/U0121:00/U0131:00/U0140:00/U0155:00/U0214:00 [FORWARD SENSING CAMERA (FSC)]

Description	U0001:88 Module communication error (HS-CAN) U0100:00 Communication error with PCM U0121:00 Communication error with DSC HU/CM U0131:00 Communication error with electric power steering (EPS) control module U0140:00 Communication error with BCM U0155:00 Communication error with instrument cluster U0214:00 Communication error with start stop unit
Detection condition	U0001:88 Forward sensing camera (FSC) cannot receive the CAN bus communication signal (HS-CAN) for 1 s or more. Forward sensing camera (FSC) detects the CAN bus communication line (HS-CAN) malfunction 10 times continuously. U0100:00 Forward sensing camera (FSC) cannot receive the CAN signal from the PCM for 1 s or more. U0121:00 Forward sensing camera (FSC) cannot receive the CAN signal from the DSC HU/CM for 1 s or more. U0131:00 Forward sensing camera (FSC) cannot receive the CAN signal from the electric power steering (EPS) control module for 1 s or more. U0140:00 Forward sensing camera (FSC) cannot receive the CAN signal from the BCM for 5 s or more. U0155:00 Forward sensing camera (FSC) cannot receive the CAN signal from the instrument cluster for 5 s or more. U0214:00 Forward sensing camera (FSC) cannot receive the CAN signal from the start stop unit for 1 s or more.
Fail-safe	U0001:88 Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system. U0100:00 Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system. U0121:00 Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system. U0131:00 Inhibits the lane departure warning system (LDWS). U0140:00 Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system. U0155:00 Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system. U0214:00 Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system.
Possible cause	Malfunction in CAN bus communication line Malfunction in CAN line between PCM and forward sensing camera (FSC) Malfunction in CAN line between DSC HU/CM and forward sensing camera (FSC) Malfunction in CAN line between electric power steering (EPS) control module and forward sensing camera (FSC) Malfunction in CAN line between BCM and forward sensing camera (FSC) Malfunction in CAN line between instrument cluster and forward sensing camera (FSC) Malfunction in CAN line between start stop unit and forward sensing camera (FSC)
System wiring diagram	Not applicable

Diagnostic Procedure

Perform the malfunction diagnosis according to the troubleshooting procedure for the multiplex communication system. (See FOREWORD.)

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