DTC C0049:85 [RADAR UNIT]

id1502a6017500

Description	Brake fluid level signal error
Detection condition	• The radar unit continues the detected condition in which the brake fluid level is less than MIN for the specified period or more.
Fail-safe	• Inhibits the Mazda radar cruise control (MRCC) system control • Inhibits the smart brake support (SBS) system control • Inhibits the distance recognition support system (DRSS) control
Possible cause	• Insufficient brake fluid level • Malfunction in circuit between brake fluid level sensor and front body control module (FBCM) and front body control module (FBCM) • Signal error in circuit between front body control module (FBCM) and radar unit
System wiring diagram	Not applicable

Diagnostic Procedure

Step	Inspection		Action
1	INSPECT BRAKE FLUID LEVEL • Inspect the brake fluid level. (See BRAKE FLUID INSPECTION.) • Is the brake fluid level normal?	Yes	Go to the next step.
1		No	Add genuine brake fluid, then go to Step 3.
2	VERIFY FRONT BODY CONTROL MODULE (FBCM) DTCs • Retrieve the front body control module (FBCM) DTCs using the M-MDS. (See DTC INSPECTION [FRONT BODY CONTROL MODULE (FBCM)].) • Are any DTCs displayed?	Yes	Repair or replace the malfunctioning part according to the applicable DTC troubleshooting. (See DTC TABLE [FRONT BODY CONTROL MODULE (FBCM)].)
2		No	Go to the next step.
3	VERIFY THAT REPAIRS HAVE BEEN COMPLETED • Clear the DTC for the radar unit using the M-MDS. (See CLEARING DTC [RADAR UNIT].) • Retrieve the radar unit DTCs using the M-MDS. (See DTC INSPECTION [RADAR UNIT].) • Is the same DTC displayed?	Yes	Repeat the inspection from Step 1. • If the malfunction recurs, replace the radar unit. (See RADAR UNIT REMOVAL/INSTALLATION.) Go to the next step.
3		No	Go to the next step.
4	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 [RADAR UNIT].)
4		No	DTC troubleshooting completed.