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

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DTC U3003:17 [FORWARD SENSING CAMERA (FSC)]

Description	Forward sensing camera (FSC) high power supply voltage input
Detection condition	Forward sensing camera (FSC) power supply circuit voltage of 16.0 ± 0.8 V or more is detected for 5 s or more with the ignition switched ON (engine off or on).
Fail-safe	Inhibits the lane departure warning system (LDWS). Inhibits the high beam control (HBC) system.
Possible cause	DTCs are stored in the PCM. Battery malfunction Generator malfunction Forward sensing camera (FSC) malfunction
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	VERIFY PCM DTCs Retrieve the PCM DTCs using the M-MDS. (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].) Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [PCM (SKYACTIV-G 2.0)].)
		No	Go to the next step.
2	INSPECT BATTERY Inspect the battery. (See BATTERY INSPECTION.) Is the battery normal?	Yes	Go to the next step.
		No	Recharge or replace the battery, then go to Step 4. (See BATTERY RECHARGING.) (See BATTERY REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
3	INSPECT GENERATOR Inspect the generator. (See GENERATOR INSPECTION [SKYACTIV-G 2.0].) Is the generator normal?	Yes	Go to the next step.
		No	Replace the generator, then go to the next step. (See GENERATOR REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)
4	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	Repeat the inspection from Step 1. If the malfunction recurs, replace the forward sensing camera (FSC). (See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION.) Go to the next step.
		No	Go to the next step.
5	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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