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.
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].)
Forward obstruction warning (FOW) system (See FORWARD OBSTRUCTION WARNING (FOW) SYSTEM.)
The vehicle control module (V/C-module) has adopted an on-board diagnostic function which can verify malfunctioning areas of the system.
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.
Detects overall malfunctions in the vehicle control module (V/C-module)-related parts.
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.
DTC tableX: Applicable—: Not applicable
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 | MRCC warning light (amber)*2 | Master warning light *3 | Description | Fail-safe function | Drive cycle | Self test type*1 | Memory function |
|
| MRCC | FOW |
|||||||
| C0049:85 | Flash | Illuminated | Brake fluid level signal error | X | X | — | C, D | X |
| C0063:54 | Flash | Illuminated | MRCC system initialization not implemented | 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 | — | C, D | X |
| C1A67:4B | Flash | Illuminated | Radar sensor is outside of operation range (ignition power supply, internal temperature) | X | X | — | C, D | X |
| C1A67:54 | Flash | Illuminated | Radar sensor aiming adjustment not implemented | X | X | — | C, D | X |
| C1A67:56 | Flash | Illuminated | Radar sensor setting information error | X | X | — | C, D | X |
| C1A67:78 | Flash | Illuminated | Radar sensor axis is deviated | X | X | — | C, D | X |
| C1A67:92 | — | Illuminated | Radar sensor sensitivity lowered | X | X | — | C, D | X |
| C1A67:95 | Flash | Illuminated | Radar sensor specification non-conformity malfunction | 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 | — | 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 | — | C, D | X |
| U0131:00 | Flash | Illuminated | Communication error with EPS control module | 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 | — | C, D | X |
| U0155:00 | Flash | Illuminated | Communication error with Instrument cluster | X | X | — | C, D | X |
| U0214:00 | Flash | Illuminated | Communication error with start stop unit | 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 | — | C, D | X |
| U0316:09 | Flash | Illuminated | Error signal received from DSC HU/CM | X | X | — | C, D | X |
| U0320:09 | Flash | Illuminated | Steering angle signal malfunction | X | X | — | C, D | X |
| U0323:00 | Flash | Illuminated | FOW/MRCC-related warning/indication signal error | 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 | — | C, D | X |
| U0415:00 | Flash | Illuminated | Error signal received from DSC HU/CM | X | X | — | C, D | X |
| U0420:00 | Flash | Illuminated | Error signal received from EPS control module | 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 | — | 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 | — | C, D | X |
| U0515:00 | Flash | Illuminated | Error signal received from start stop unit | 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 | — | C, D | X |
| U101D:00 | Flash | Illuminated | Error signal received from radar sensor | X | X | — | C, D | X |
| U1A00:88 | Flash | Illuminated | CAN communication error (Bus off) | X | X | — | C, D | X |
| U2300:54 | Flash | Illuminated | Configuration error (data not received) | X | X | — | C, D | X |
| U2300:55 | Flash | Illuminated | Configuration error (no configuration) | X | X | — | C, D | X |
| U2300:56 | Flash | Illuminated | Configuration error (Ineffective/non-interchangeable data read) | X | X | — | C, D | X |
| U2300:64 | Flash | Illuminated | Configuration error (error value read) | X | X | — | C, D | X |
| U3000:04 | Flash | Illuminated | Mazda radar cruise control (MRCC) system operation malfunction | X | — | — | C, D | X |
| U3000:44 | Flash | Illuminated | Vehicle configuration module configuration information error | X | X | — | C, D | X |
| U3000:49 | Flash | Illuminated | Vehicle control module (V/C-module) internal malfunction | X | X | — | C, D | X |
| U3003:16 | Flash | Illuminated | Vehicle control module (V/C-module) power supply voltage decreases | X | X | — | C, D | X |
| U3003:17 | Flash | Illuminated | Vehicle control module (V/C-module) power supply voltage increases | X | X | — | C, D | X |
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 stored data using the scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.
The status byte is the two digits (after hyphen) after the 7-digit DTC.
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.
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 Mazda Modular Diagnostic System (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
—: Not applicable
The data for all DTCs currently detected is stored.
| 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 |
| VPWR*1 |
|
| IG-ON_TIMER | hh:mm:ss*2 | Elapsed time since ignition was switched ON (engine off or on) NOTE:
|
| — |
|
| 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 |
|
| — |
|
| RPM_STATUS | Engine Stop/Under1500rpm/Over1500rpm/FAIL | Engine speed status |
| TACHOMTR*1 |
|
| SHIFT_STATUS | P/N/D/R/FAIL | Selector lever position status |
| — |
|
| 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.
| — |
| TOTAL_TIME | hh:mm:ss*2 | Accumulated total elapsed time since vehicle completion until vehicle control module (V/C-module) detects a DTC NOTE:
| 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.
| 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 |
| SPEEDOMTR*1 |
|
PID/data monitor table
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 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 |
|
The vehicle control module (V/C-module) is installed to the right side below the dashboard.
Inhibits the MRCC system control.
Inhibits the FOW system control.