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

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DTC U0415:68 [FORWARD SENSING CAMERA (FSC)]

Description	Error signal received from DSC HU/CM
Detection condition	Forward sensing camera (FSC) receives the error signal from the DSC HU/CM for 5 s or more.
Fail-safe	Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system.
Possible cause	DTCs are stored in the DSC HU/CM. DSC HU/CM malfunction Forward sensing camera (FSC) malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY DSC HU/CM DTCs Retrieve the DSC HU/CM DTCs using the M-MDS. (See DTC INSPECTION [DSC HU/CM].) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [DSC HU/CM].)
		No	Go to the next step.
2	VERIFY THAT REPAIRS HAVE BEEN COMPLETED Clear the DTC for the forward sensing camera (FSC) using the M-MDS. (See CLEARING DTC [FORWARD SENSING CAMERA (FSC)].) Switch the ignition ON (engine off or on) and wait for 6.5 s or more. Retrieve the forward sensing camera (FSC) DTCs using the M-MDS. (See DTC INSPECTION [FORWARD SENSING CAMERA (FSC)].) Is the same DTC displayed?	Yes	Replace the forward sensing camera (FSC), then go to the next step. (See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.)
		No	Go to the next step.
3	VERIFY IF OTHER DTCs DISPLAYED Are any other DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [FORWARD SENSING CAMERA (FSC)].)
		No	DTC troubleshooting completed.

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