VEHICLE CONTROL MODULE (V/C-MODULE) [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM]

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Purpose

• The vehicle control module (V/C-module) controls the travel speed of the detecting vehicle and the brakes in conjunction with the distance between the detecting vehicle and the vehicle ahead.

• If the distance between the detecting vehicle and the vehicle ahead is too close, the vehicle control module (V/C-module) performs control to notify the driver using the display in the instrument cluster.

Function

• The vehicle control module (V/C-module) performs the following controls based on the signals from the radar sensor and each control module.

― Mazda radar cruise control (MRCC) system (See MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM [MAZDA RADAR CRUISE CONTROL (MRCC) SYSTEM].)

― Smart brake support (SBS) system (See SMART BRAKE SUPPORT (SBS).)

― Distance recognition support system (DRSS) (See DISTANCE RECOGNITION SUPPORT SYSTEM (DRSS).)

• The vehicle control module (V/C-module) has adopted an on-board diagnostic function which can verify malfunctioning areas of the system.

On-board diagnostic function

• The on-board diagnostic function consists of the following functions: A malfunction detection function, which detects overall malfunctions in the vehicle control module (V/C-module) related parts; a memory function, which stores detected DTCs; a display function, which indicates system malfunctions via DTC display; and a PID/data monitoring function, which reads out specific input/output signals.

• Using the Mazda Modular Diagnostic System (M-MDS), DTCs can be read out and deleted, and PID/data monitoring can be performed.

Malfunction detection function

• Detects overall malfunctions in the vehicle control module (V/C-module)-related parts.

Display function

• If a system malfunction is detected, the display function notifies the driver of the system malfunction by performing the following controls.

― Controls MRCC warning light (amber) to flash

― Displays “MRCC Inspection Required” on LCD in instrument cluster

― Activates buzzer in instrument cluster

• If the radar performance is lowered due to soiling, a message is displayed in the LCD in the instrument cluster.

Memory function

• The memory function stores malfunctions detected in the vehicle control module (V/C-module)-related parts using the malfunction detection function, and the stored malfunction contents are not cleared even if the ignition is switched off or the negative battery cable is disconnected.

DTC table

X: Applicable

—: Not applicable

DTC	MRCC warning light (amber)^*2	Master warning light^*3	Description	Fail-safe function			Drive cycle	Self test type^*1	Memory function
DTC	MRCC warning light (amber)^*2	Master warning light^*3	Description	MRCC	SBS	DRSS	Drive cycle	Self test type^*1	Memory function
C0049:85	Flash	Illuminated	Brake fluid level signal error	X	X	X	—	C, D	X
C0063:54	Flash	Illuminated	MRCC system initialization not implemented	X	X	X	—	C, D	X
C1105:62	Flash	Illuminated	Brake light signal malfunction	X	X	—	—	C, D	X
C1A67:04	Flash	Illuminated	Radar sensor internal circuit malfunction	X	X	X	—	C, D	X
C1A67:4B	Flash	Illuminated	Radar sensor is outside of operation range (ignition power supply, internal temperature)	X	X	X	—	C, D	X
C1A67:54^*4	Flash	Illuminated	Radar sensor aiming adjustment not implemented	X	X	X	—	C, D	X
C1A67:56	Flash	Illuminated	Radar sensor setting information error	X	X	X	—	C, D	X
C1A67:78	Flash	Illuminated	Radar sensor axis is deviated	X	X	X	—	C, D	X
C1A67:92	—	Illuminated	Radar sensor sensitivity lowered	X	X	X	—	C, D	X
C1A67:95	Flash	Illuminated	Radar sensor specification non-conformity malfunction	X	X	X	—	C, D	X
C1A96:62	Flash	Illuminated	Brake switch malfunction	X	X	—	—	C, D	X
P1697:86	Flash	—	Cruise control switch (DISTANCE switch) malfunction signal reception	X	—	—	—	C, D	X
U0001:88	Flash	Illuminated	Module communication error (HS-CAN)	X	X	X	—	C, D	X
U0100:00	Flash	—	Communication error with PCM	X	—	—	—	C, D	X
U0101:00	Flash	Illuminated	Communication error with TCM	X	X	—	—	C, D	X
U0121:00	Flash	Illuminated	Communication error with DSC HU/CM	X	X	X	—	C, D	X
U0131:00	Flash	Illuminated	Communication error with EPS control module	X	X	X	—	C, D	X
U0140:00	Flash	Illuminated	Communication error with front body control module (FBCM)	X	X	—	—	C, D	X
U0151:00	Flash	Illuminated	Communication error with SAS control module	X	X	X	—	C, D	X
U0155:00	Flash	Illuminated	Communication error with Instrument cluster	X	X	X	—	C, D	X
U0214:00	Flash	Illuminated	Communication error with start stop unit	X	X	X	—	C, D	X
U0235:68	—	—	Communication error with laser sensor	—	—	—	—	C, D	X
U023A:00	—	Illuminated	Communication error with forward sensing camera (FSC)	—	—	—	—	C, D	X
U0301:09	Flash	Illuminated	Error signal received from PCM	X	X	X	—	C, D	X
U0316:09^*5	Flash	Illuminated	Error signal received from DSC HU/CM	X	X	X	—	C, D	X
U0320:09	Flash	Illuminated	Steering angle signal malfunction	X	X	X	—	C, D	X
U0323:00	Flash	Illuminated	SBS/MRCC-related warning/indication signal error	X	X	X	—	C, D	X
U0401:00	Flash	—	Error signal received from PCM	X	—	—	—	C, D	X
U0402:00	Flash	Illuminated	Error signal received from TCM	X	X	X	—	C, D	X
U0415:00	Flash	Illuminated	Error signal received from DSC HU/CM	X	X	X	—	C, D	X
U0420:00	Flash	Illuminated	Error signal received from EPS control module	X	X	X	—	C, D	X
U0422:00	Flash	Illuminated	Error signal received from front body control module (FBCM)	X	X	—	—	C, D	X
U0423:00	Flash	Illuminated	Error signal received from instrument cluster	X	X	X	—	C, D	X
U0433:68	—	—	Error signal received from laser sensor	—	—	—	—	C, D	X
U0443:00	Flash	Illuminated	Error signal received from rear body control module (RBCM)	X	X	—	—	C, D	X
U0452:86	Flash	Illuminated	Error signal received from SAS control module	X	X	X	—	C, D	X
U0515:00	Flash	Illuminated	Error signal received from start stop unit	X	X	X	—	C, D	X
U053B:68	—	Illuminated	Error signal received from forward sensing camera (FSC)	—	—	—	—	C, D	X
U101C:00	Flash	Illuminated	Radar sensor communication error	X	X	X	—	C, D	X
U101D:00	Flash	Illuminated	Error signal received from radar sensor	X	X	X	—	C, D	X
U1A00:88	Flash	Illuminated	CAN communication error (Bus off)	X	X	X	—	C, D	X
U2300:54	Flash	Illuminated	Configuration error (data not received)	X	X	X	—	C, D	X
U2300:55	Flash	Illuminated	Configuration error (no configuration)	X	X	X	—	C, D	X
U2300:56	Flash	Illuminated	Configuration error (Ineffective/non-interchangeable data read)	X	X	X	—	C, D	X
U2300:64	Flash	Illuminated	Configuration error (error value read)	X	X	X	—	C, D	X
U3000:04	Flash	Illuminated	Mazda radar cruise control (MRCC) system operation malfunction	X	X	X	—	C, D	X
U3000:44	Flash	Illuminated	Vehicle configuration module configuration information error	X	X	X	—	C, D	X
U3000:49	Flash	Illuminated	Vehicle control module (V/C-module) internal malfunction	X	X	X	—	C, D	X
U3003:16	Flash	Illuminated	Vehicle control module (V/C-module) power supply voltage decreases	X	X	X	—	C, D	X
U3003:17	Flash	Illuminated	Vehicle control module (V/C-module) power supply voltage increases	X	X	X	—	C, D	X

*1 :C: CMDTC self test, D: ODDTC self test

*2 :The MRCC warning light (amber) flashes only when the MRCC ON switch is ON.

*3 :The master warning light is illuminated only when the SBS/DRSS is ON.

*4 :If both the front and rear wheels are rotated using a 4-wheel chassis dynamometer, the vehicle control module (V/C-module) determines that there is an error in the location information of the object which is detected by the radar sensor. As a result, the vehicle control module (V/C-module) illuminates the master warning light, displays "MRCC Inspection Required", "SBS Inspection Required", or "DRSS Inspection Required" on the LCD, and stores DTC C1A67:54. The master warning light and "MRCC Inspection Required", "SBS Inspection Required", or "DRSS Inspection Required" indication can be turned off by switching the ignition off (LOCK) after removing the vehicle from the 4-wheel chassis dynamometer. The stored DTC C1A67:54 can be cleared using the M-MDS.

*5 :If either the front or rear wheels are rotated using a 2-wheel chassis dynamometer, the DSC HU/CM determines that the DSC is malfunctioning. As a result, it determines that the vehicle control module (V/C-module) is also malfunctioning, then flashes the MRCC warning light (amber), illuminates the master warning light, and stores DTC U0316:09. After the vehicle is removed from the 2-wheel dynamometer, the ignition switched off (LOCK), and then switched back ON (engine ON), the MRCC warning light (amber) and the master warning light turn off when the vehicle is driven at 10 km/h {6.2 mph} or more. Clear DTC U0316:09 from the memory using the M-MDS.

DTC 7-digit code definition

• When related systems or components have failed, the CM stores the DTC of the malfunctioning part in the CM memory, and allows for the retrieval of the store data using scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.

am6zzn00002773

Status byte for DTC

• The status byte is the two digits (after hyphen) after the 7-digit DTC.

am6zzn00002774

• The status byte is a code which indicates the pending code, current/past malfunction status, or warning illumination status.

• The status byte can be read by performing a CMDTC self-test using the Mazda Modular Diagnostic System (M-MDS).

• For details on the status byte, refer to the explanation on the Mazda Modular Diagnostic System (M-MDS) when reading the DTC.

Snapshot data

Note

• The vehicle control module (V/C-module) stores the following two types of information when a DTC is detected and displays snapshot data in the M-MDS.

― Vehicle information detected by vehicle control module (V/C-module)

― Vehicle information detected by instrument cluster and received by vehicle control module (V/C-module) via CAN signal

• The data for all DTCs currently detected is stored.

Snapshot data table

—: Not applicable

Snapshot data item	Unit		Definition	Data read/use method	Corresponding PID data monitor item
AAT	°C	°F	Ambient temperature	—	—
APP_STATUS	Accelerator Pedal Off/ Under20%/ Over20%/FAIL		Accelerator pedal position status	—	—
CFG_STATUS	Config Complete/ Not Configured/ Config Error		Instrument cluster configuration status	—	—
ECT_STATUS	Under 0 degrees C/ 0-Under 80 degrees C/ Over 80 degrees C/ FAIL		Engine coolant temperature status	—	—
IC_VPWR	V		Instrument cluster power supply voltage	• The vehicle control module (V/C-module) constantly receives the power supply voltage value of the instrument cluster sent via CAN signal from the instrument cluster. • If a DTC is detected, the vehicle control module (V/C-module) records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).	VPWR^*1
IG-ON_TIMER	hh:mm:ss^*2		Elapsed time since ignition was switched ON (engine off or on) Note • The instrument cluster records the elapsed time since the ignition was switched ON (engine off or on).	• The vehicle control module (V/C-module) constantly receives the elapsed time since the ignition was switched ON (engine off or on) sent via CAN signal from the instrument cluster. • If a DTC is detected, the vehicle control module (V/C-module) records the elapsed time since the ignition was switched ON (engine off or on) when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).	—
PWR_MODE_KEY	Key Out/Key Recently Out (Position 0)/ Accessory (Position 1)/Post Ignition (Position 2)/Ignition On (Position 2)/Running (Position 2)/Running - Starting		• Key Out: Ignition switched off • Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched off • Accessory (Position 1): Ignition is switched to ACC • Post Ignition (Position 2): Elapsed time within 3 s since ignition was switched ON • Ignition On (Position 2): Ignition switched ON (engine off) • Running (Position 2): Ignition switched ON (engine on) • Running - Starting: Cranking condition	• The vehicle control module (V/C-module) constantly receives the ignition switch status sent via CAN signal from the instrument cluster. • If a DTC is detected, the vehicle control module (V/C-module) records the ignition switch status when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).	—
RPM_STATUS	Engine Stop/ Under1500rpm/ Over1500rpm/ FAIL		Engine speed status	• The vehicle control module (V/C-module) constantly receives the engine speed sent via CAN signal from the instrument cluster. • If a DTC is detected, the vehicle control module (V/C-module) records the engine speed when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).	TACHOMTR^*1
SHIFT_STATUS	P/N/ D/ R/ FAIL		Selector lever position status	• The vehicle control module (V/C-module) constantly receives the selector lever position sent via CAN signal from the instrument cluster. • If a DTC is detected, the vehicle control module (V/C-module) records the selector lever position when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).	—
TOTAL_DIST	km	miles	Accumulated total traveled distance from completion of vehicle until vehicle control module (V/C-module) detects DTC (Odometer value in instrument cluster)	The total traveled distance from which the vehicle control module (V/C-module) detects DTCs to the present can be calculated by performing the following procedure. 1. Verify the odometer value in the instrument cluster. 2. Verify the snapshot data item TOTAL_DIST. 3. Subtract 2 from 1.	—
TOTAL_TIME	hh:mm:ss^*2		Accumulated total elapsed time since vehicle completion until vehicle control module (V/C-module) detects a DTC Note • When the ROOM fuse is removed, and the ignition is switched off, the time is not included in the elapsed time.	The elapsed time from which the vehicle control module (V/C-module) detects DTCs to the present can be calculated by performing the following procedure. 1. Verify the instrument cluster PID item TOTAL_TIME. 2. Verify the snapshot data item TOTAL_TIME. 3. Subtract 2 from 1.	TOTAL_TIME^*1
VPWR	V		Vehicle control module (V/C-module) power supply voltage	—	VPWR
VSPD_STATUS	Stop/ 0-10km/h/ Over10km/h/ FAIL		Vehicle speed status	• The vehicle control module (V/C-module) constantly receives the vehicle speed sent via CAN signal from the instrument cluster. • If a DTC is detected, the vehicle control module (V/C-module) records the vehicle speed when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).	SPEEDOMTR^*1

*1 :Instrument cluster PID (See ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER].)

*2 :The seconds may be indicated after the decimal point.

PID/Data monitoring function

• By using the PID/data monitoring function, the monitored item of the input/output signal, as set on the vehicle control module (V/C-module), can be freely selected and read out in real-time.

• The Mazda Modular Diagnostic System (M-MDS) is used to read out PID/data monitor information.

PID/data monitor table

PID name (definition)	Unit/Operation	Operation Status (Reference)	Inspection item(s)
TGT_ANGL_COL (Horizontal angle with target (correction value))	°	Normal value: -0.1—0.1	Radar sensor
TGT_ANGL_RAW (Horizontal angle with target (no correction))	°	Normal value: -0.3—0.3	Radar sensor
TGT_DIST (Distance to target)	m	Normal value: 4.9—5.1	Radar sensor
TGT_VEL (Relative speed of target)	KPH	Normal value: -0.01—0.01	Radar sensor
VPWR (Vehicle control module (V/C-module) supply voltage)	V	Normal value: 9—16.3	• Battery • IG1 relay • Vehicle control module (V/C-module)

Construction

• The vehicle control module (V/C-module) is installed to the right side below the dashboard.

am6zzn00002772

Fail-safe

Mazda radar cruise control (MRCC) system

• Inhibits the MRCC system control.

Smart brake support (SBS) system

• Inhibits the SBS system control.

Distance recognition support system (DRSS)

• Inhibits the DRSS control.