DTC INSPECTION [DSC HU/CM] - MAZDA CX-9 TC 2016

• The DSC HU/CM stores the following two types of information when a DTC is detected and displays snapshot data in the M-MDS

? Vehicle information detected by DSC HU/CM

? Vehicle information detected by instrument cluster and received via CAN communication

• Refer to PID monitor table for confirm the DSC system operation status while the laser sensor does not store the DTC. (See PID/DATA MONITOR TABLE [DSC HU/CM].)

• Snapshot data items are not displayed, according to detected DTC.

Snapshot data item	Unit	Definition	Data read/use method	Corresponding data monitor items
AAT	°C, °F	Ambient air temperature	—	—
ABS	INACTIVE/ACTIVE	Antilock braking system	—	—
APP_STATUS	Accelerator Pedal Off/ Under20%/ Over20%/ FAIL	Accelerator pedal position	—	—
AYC	INACTIVE/ACTIVE	Active yaw control	—	—
BRAKE_SW	Off/On	Brake switch	—	BRAKE_SW
BRK_F_P_R	kPa	Brake fluid line hydraulic pressure	—	BRK_F_P_C BRK_F_P_R
BTCS	INACTIVE/ACTIVE	Brake traction control system	—	—
CFG_STATUS	Config Complete/ Not Configured/ Config Error	Configuration status	—	—
DSC_OFF_SW	Off/On	TCS OFF switch	—	DSC_OFF_SW
DSC_ST	Off/On	DSC status	—	DSC_OFF_ST
ECT_STATUS	Under 0 degrees C/ 0 - Under 80 degrees C/ Over 80 degrees C/ FAIL	Engine coolant temperature status	—	—
EDC#1	INACTIVE/ACTIVE	Engine drag control	—	—
IC_VPWR	V	Instrument cluster power supply	• The DSC HU/CM 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 DSC HU/CM 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 Note • The instrument cluster records the elapsed time since the ignition was switched ON.	• The DSC HU/CM constantly receives the elapsed time since the ignition was switched ON sent via CAN signal from the instrument cluster. • If a DTC is detected, the DSC HU/CM records the elapsed time since the ignition was switched ON when the DTC was detected, and it is displayed in the M-MDS.	—
LAT_ACCL_R	G	Lateral acceleration	—	LAT_ACCL_R
LON_ACCL_R	G	Longitudinal acceleration	—	LON_ACCL_C
P_BRAKE_SW	Off/On	Parking brake switch	—	P_BRAKE_SW
PMP_MT_SP	Off/On	Pump motor	—	PMP_MT_SP
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 DSC HU/CM constantly receives the ignition switch status sent via CAN signal from the instrument cluster. • If a DTC is detected, the DSC HU/CM records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.	—
R_GEAR_SW	Off/On	Reverse gear switch	—	R_GEAR_SW
RPM_STATUS	Engine Stop/ Under1500rpm/ Over1500rpm/ FAIL	Engine RPM status	• The DSC HU/CM constantly receives the engine speed sent via CAN signal from the instrument cluster. • If a DTC is detected, the DSC HU/CM records the engine speed when the DTC was detected, and it is displayed in the M-MDS.	TACHOMTR^*1
RSC#1	INACTIVE/ACTIVE	Roll stability control	—	—
SHIFT_STATUS	P/N D/ R/ FAIL	Shift position status	• The DSC HU/CM constantly receives the selector lever position sent via CAN signal from the instrument cluster. • If a DTC is detected, the DSC HU/CM records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.	—
STR_ANG_C	°	Steering wheel angle	—	STR_ANG_C
TCS	INACTIVE/ACTIVE	Traction control system	—	—
TOTAL_DIST	km, ft, mi	Accumulated total traveled distance from completion of vehicle until DSC HU/CM detects DTC (Odometer value in instrument cluster)	The distance traveled when the DSC HU/CM detected a DTC can be calculated by performing the following procedure. 1. Verify the odometer value in the instrument cluster. 2. Verify the snap shot data item TOTAL_DIST. 3. Subtract 2 from 1.	—
TOTAL_TIME	hh:mm:ss^*2	Accumulated total elapsed time since vehicle completion until DSC HU/CM 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 when the DSC HU/CM detected a DTC can be calculated by performing the following procedure. 1. Verify the PID item TOTAL_TIME of the instrument cluster. 2. Verify the snap shot data item TOTAL_TIME. 3. Subtract 2 from 1.	TOTAL_TIME^*1
TSC	INACTIVE/ACTIVE	Trailer stability control	—	—
V_INLET_LF	Off/On	LF inlet solenoid valve	—	V_INLET_LF
V_INLET_LR	Off/On	LR inlet solenoid valve	—	V_INLET_LR
V_INLET_RF	Off/On	RF inlet solenoid valve	—	V_INLET_RF
V_INLET_RR	Off/On	RR inlet solenoid valve	—	V_INLET_RR
V_OUTLET_LF	Off/On	LF outlet solenoid valve	—	V_OUTLET_LF
V_OUTLET_LR	Off/On	LR outlet solenoid valve	—	V_OUTLET_LR
V_OUTLET_RF	Off/On	RF outlet solenoid valve	—	V_OUTLET_RF
V_OUTLET_RR	Off/On	RR outlet solenoid valve	—	V_OUTLET_RR
V_STB_LF/RR	Off/On	LF/RR stability control solenoid valve	—	V_STB_LF/RR
V_STB_RF/LR	Off/On	RF/LR stability control solenoid valve	—	V_STB_RF/LR
V_TRC_LF/RR	Off/On	LF/RR traction control solenoid valve	—	V_TRC_LF/RR
V_TRC_RF/LR	Off/On	RF/LR traction control solenoid valve	—	V_TRC_RF/LR
VPWR	V	Power supply	—	VPWR_B_SOL
VSPD	KPH, MPH	Vehicle speed	—	VSPD
VSPD_STATUS	Stop/ 0-10km/h/ Over10km/h/ FAIL	Vehicle speed status	• The DSC HU/CM constantly receives the vehicle speed sent via CAN signal from the instrument cluster. • If a DTC is detected, the DSC HU/CM records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.	SPEEDOMTR^*1
WSPD_SEN_LF	KPH, MPH	Wheel speed	—	WSPD_SEN_LF
WSPD_SEN_LR	KPH, MPH	Wheel speed	—	WSPD_SEN_LF
WSPD_SEN_RF	KPH, MPH	Wheel speed	—	WSPD_SEN_LF
WSPD_SEN_RR	KPH, MPH	Wheel speed	—	WSPD_SEN_LF
YAW_RATE_R	°/s	Yaw rate	—	YAW_RATE_R

Snapshot data item

Unit

Definition

Data read/use method

Corresponding data monitor items

AAT

°C, °F

Ambient air temperature

—

ABS

INACTIVE/ACTIVE

Antilock braking system

—

APP_STATUS

Accelerator Pedal Off/

Under20%/

Over20%/

FAIL

Accelerator pedal position

—

AYC

INACTIVE/ACTIVE

Active yaw control

—

BRAKE_SW

Off/On

Brake switch

—

BRAKE_SW

BRK_F_P_R

kPa

Brake fluid line hydraulic pressure

—

BRK_F_P_C

BRK_F_P_R

BTCS

INACTIVE/ACTIVE

Brake traction control system

—

CFG_STATUS

Config Complete/

Not Configured/

Config Error

Configuration status

—

DSC_OFF_SW

Off/On

TCS OFF switch

—

DSC_OFF_SW

DSC_ST

Off/On

DSC status

—

DSC_OFF_ST

ECT_STATUS

Under 0 degrees C/

0 - Under 80 degrees C/

Over 80 degrees C/

FAIL

Engine coolant temperature status

—

EDC#1

INACTIVE/ACTIVE

Engine drag control

—

IC_VPWR

Instrument cluster power supply

• The DSC HU/CM 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 DSC HU/CM 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

Note

• The instrument cluster records the elapsed time since the ignition was switched ON.

• The DSC HU/CM constantly receives the elapsed time since the ignition was switched ON sent via CAN signal from the instrument cluster.

• If a DTC is detected, the DSC HU/CM records the elapsed time since the ignition was switched ON when the DTC was detected, and it is displayed in the M-MDS.

—

LAT_ACCL_R

Lateral acceleration

—

LAT_ACCL_R

LON_ACCL_R

Longitudinal acceleration

—

LON_ACCL_C

P_BRAKE_SW

Off/On

Parking brake switch

—

P_BRAKE_SW

PMP_MT_SP

Off/On

Pump motor

—

PMP_MT_SP

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 DSC HU/CM constantly receives the ignition switch status sent via CAN signal from the instrument cluster.

• If a DTC is detected, the DSC HU/CM records the ignition switch status when the DTC was detected, and it is displayed in the M-MDS.

—

R_GEAR_SW

Off/On

Reverse gear switch

—

R_GEAR_SW

RPM_STATUS

Engine Stop/

Under1500rpm/

Over1500rpm/

FAIL

Engine RPM status

• The DSC HU/CM constantly receives the engine speed sent via CAN signal from the instrument cluster.

• If a DTC is detected, the DSC HU/CM records the engine speed when the DTC was detected, and it is displayed in the M-MDS.

TACHOMTR^*1

RSC#1

INACTIVE/ACTIVE

Roll stability control

—

SHIFT_STATUS

P/N

FAIL

Shift position status

• The DSC HU/CM constantly receives the selector lever position sent via CAN signal from the instrument cluster.

• If a DTC is detected, the DSC HU/CM records the selector lever position when the DTC was detected, and it is displayed in the M-MDS.

—

STR_ANG_C

Steering wheel angle

—

STR_ANG_C

TCS

INACTIVE/ACTIVE

Traction control system

—

TOTAL_DIST

km, ft, mi

Accumulated total traveled distance from completion of vehicle until DSC HU/CM detects DTC (Odometer value in instrument cluster)

The distance traveled when the DSC HU/CM detected a DTC can be calculated by performing the following procedure.

1. Verify the odometer value in the instrument cluster.

2. Verify the snap shot data item TOTAL_DIST.

3. Subtract 2 from 1.

—

TOTAL_TIME

hh:mm:ss^*2

Accumulated total elapsed time since vehicle completion until DSC HU/CM 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 when the DSC HU/CM detected a DTC can be calculated by performing the following procedure.

1. Verify the PID item TOTAL_TIME of the instrument cluster.

2. Verify the snap shot data item TOTAL_TIME.

3. Subtract 2 from 1.

TOTAL_TIME^*1

TSC

INACTIVE/ACTIVE

Trailer stability control

—

V_INLET_LF

Off/On

LF inlet solenoid valve

—

V_INLET_LF

V_INLET_LR

Off/On

LR inlet solenoid valve

—

V_INLET_LR

V_INLET_RF

Off/On

RF inlet solenoid valve

—

V_INLET_RF

V_INLET_RR

Off/On

RR inlet solenoid valve

—

V_INLET_RR

V_OUTLET_LF

Off/On

LF outlet solenoid valve

—

V_OUTLET_LF

V_OUTLET_LR

Off/On

LR outlet solenoid valve

—

V_OUTLET_LR

V_OUTLET_RF

Off/On

RF outlet solenoid valve

—

V_OUTLET_RF

V_OUTLET_RR

Off/On

RR outlet solenoid valve

—

V_OUTLET_RR

V_STB_LF/RR

Off/On

LF/RR stability control solenoid valve

—

V_STB_LF/RR

V_STB_RF/LR

Off/On

RF/LR stability control solenoid valve

—

V_STB_RF/LR

V_TRC_LF/RR

Off/On

LF/RR traction control solenoid valve

—

V_TRC_LF/RR

V_TRC_RF/LR

Off/On

RF/LR traction control solenoid valve

—

V_TRC_RF/LR

VPWR

Power supply

—

VPWR_B_SOL

VSPD

KPH, MPH

Vehicle speed

—

VSPD

VSPD_STATUS

Stop/

0-10km/h/

Over10km/h/

FAIL

Vehicle speed status

• The DSC HU/CM constantly receives the vehicle speed sent via CAN signal from the instrument cluster.

• If a DTC is detected, the DSC HU/CM records the vehicle speed when the DTC was detected, and it is displayed in the M-MDS.

SPEEDOMTR^*1

WSPD_SEN_LF

KPH, MPH

Wheel speed

—

WSPD_SEN_LF

WSPD_SEN_LR

KPH, MPH

Wheel speed

—

WSPD_SEN_LF

WSPD_SEN_RF

KPH, MPH

Wheel speed

—

WSPD_SEN_LF

WSPD_SEN_RR

KPH, MPH

Wheel speed

—

WSPD_SEN_LF

YAW_RATE_R

°/s

Yaw rate

—

YAW_RATE_R