ON-BOARD DIAGNOSTIC [ACTIVE DRIVING DISPLAY]

id092200021858


Outline

•  The on-board diagnostic function consists of the following functions:
―  A malfunction detection function, which detects overall malfunctions in the instrument cluster-related parts.
―  A memory function, which stores detected DTCs.
―  A display function, which indicates malfunction locations and status via DTC output.
―  A PID/data monitoring function, which reads out specific input/output signals and verifies the input/output condition.
•  Using the Mazda Modular Diagnostic System (M-MDS), DTCs can be read out and deleted, and the PID/data monitoring function can be activated.

Malfunction Detection Function

•  Detects malfunctions in input/output signals.
•  If a malfunction occurs, the active driving display records the malfunction as a DTC. A recorded DTC can be read by the Mazda Modular Diagnostic System (M-MDS).

×: Applicable
—: Not applicable

DTC No.

Warning/indicator light

Description

Fail-safe

Drive cycle

Self test type*1

Memory function
U0001:88
—
Module communication error (HS-CAN)
—
—
C
×
U0100:00
Illuminated/Flash
Communication error with PCM
—
—
C
×
U0101:00*2
—
Communication error with TCM
—
—
C
×
U0104:00*3
—
Communication error with radar unit
—
—
C
×
U0155:00*4
—
Communication error with instrument cluster
—
—
C
×
U0156:00
Illuminated/Flash
Communication error with connectivity master unit (CMU)
—
—
C
×
U0235:00*5
—
Communication error with laser sensor
×
—
C
×
U023A:00*6
Illuminated/Flash
Communication error with forward sensing camera (FSC)
—
—
C
×
U0298:00
—
Communication error with DC-DC converter (i-ELOOP)
—
—
C
×
U3003:16
—
Low power supply voltage input to active driving display
—
—
C
×

*1  :C: CMDTC self test, D: ODDTC self test
*2  :ATX
*3  :With mazda radar cruise control (MRCC) system
*4  :With center display
*5  :With smart city brake support (SCBS)
*6  :With forward sensing camera (FSC)

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.
am6xun00000789


Status byte for DTC

•  The two digits (two digits after hyphen (-)) after the 7-digit DTC.
ac5wzn00002008
•  A code which indicates the pending code, current/past malfunction status, or warning illumination status.
•  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.


Detection condition for the applicable DTC

DTC No.

Description

Detection condition
U0001:88
Module communication error (HS-CAN)
•  Active driving display detects a CAN bus communication line (HS-CAN) malfunction.
U0100:00
Communication error with PCM
•  Active driving display cannot receive the CAN signal from the PCM.
U0101:00*1
Communication error with TCM
•  Active driving display cannot receive the CAN signal from the TCM for 1 s or more.
U0104:00*2
Communication error with radar unit
•  Active driving display cannot receive the CAN signal from the radar unit for 1 s or more.
U0155:00*3
Communication error with instrument cluster
•  Active driving display cannot receive the CAN signal from the instrument cluster for 5 s or more.
U0156:00
Communication error with connectivity master unit (CMU)
•  Active driving display cannot receive the CAN signal from the connectivity master unit (CMU) for 5 s or more.
U0235:00*4
Communication error with laser sensor
•  Active driving display cannot receive the CAN signal from the laser sensor for 1 s or more.
U023A:00*5
Communication error with forward sensing camera (FSC)
•  Active driving display cannot receive the CAN signal from the forward sensing camera (FSC) for 1 s or more.
U0298:00
Communication error with DC-DC converter (i-ELOOP)
•  Active driving display cannot receive the CAN signal from the DC-DC converter (i-ELOOP) for 5 s or more.
U3003:16
Low power supply voltage input to active driving display
•  Active driving display power supply circuit voltage of less than 10 V is detected.

*1  :ATX
*2  :With mazda radar cruise control (MRCC) system
*3  :With center display
*4  :With smart city brake support (SCBS)
*5  :With forward sensing camera (FSC)


Snapshot Data

•  The data for all DTCs currently detected is stored.

—: Not applicable

Snapshot data item

Unit

Data contents

Data read/use method

Corresponding data monitor items
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 active driving display 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 active driving display records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the 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 active driving display 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 active driving display 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 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 (engine off or on)
•  Ignition On (Position 2): Ignition switched ON (engine off)
•  Running (Position 2): Ignition switched ON (engine on)
•  Running - Starting: Cranking condition
•  The active driving display constantly receives the ignition switch status sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the active driving display records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.
—
RPM_STATUS
Engine Stop/Under1500rpm/Over1500rpm/FAIL
Engine speed status
•  The active driving display constantly receives the engine speed sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the active driving display records the engine speed when the DTC was detected, and it is displayed in the M-MDS.
TACHOMTR*1
SHIFT_STATUS
P/N/D/R/FAIL
Selector lever position status
•  The active driving display constantly receives the selector lever position sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the active driving display records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.
—
TOTAL_DIST
km
Miles
Accumulated total traveled distance from completion of vehicle until active driving display detects DTC (Odometer value in instrument cluster)
The total traveled distance from which the active driving display 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 active driving display 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 active driving display 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
Active driving display power supply voltage
—
VPWR_B
VSPD_STATUS
Stop/0-10km/h/Over10km/h/FAIL
Vehicle speed status
•  The active driving display constantly receives the vehicle speed sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the active driving display records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.
SPEEDOMTR*1

*1  :Instrument cluster PID (See ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER].)
*2  :The seconds may be indicated after the decimal point.

Data Monitor Function

•  With the PID/data monitor function, the input/output signal monitor items set in the instrument cluster can be selected and read out in real-time.
•  The items which can be selected are as follows.

—: Not applicable

PID

Unit/Operation

Data contents

Module control terminal
MAINT_MODE
Off/On
•  Off: Maintenance mode is not launched
•  On: Maintenance mode is launched
—
VPWR_B
V
Displays power supply voltage
F


Simulation Function

•  The simulation function drives the output parts set in the instrument cluster regardless of the instrument cluster control condition.
•  The items which can be selected are as follows.
Note
•  Simulation items on parts which are not equipped to the vehicle do not operate.

Simulation item

Unit/Operation

Data contents

Output part name
MAINT_MODE
Off/On
•  Off: Finish maintenance mode
•  On: Launch maintenance mode
Active driving display