ON-BOARD DIAGNOSTIC FUNCTION

id094000101700

• The on-board diagnostic system consists of a malfunction detection system that detects abnormalities in input/output signals, a data monitor function that reads out specified input/output signals.

• The data link connector 2 (DLC-2), which groups together all the connectors used for malfunction diagnosis and detecting/repair into a single location, has been adopted, thereby improving serviceability. Diagnosis is performed by connecting the Mazda Modular Diagnostic System (M-MDS) to the DLC-2.

• In addition to DTC read-out, the Mazda Modular Diagnostic System (M-MDS) is used to clear DTCs using the display screen of the diagnostic tester, and to access the PID/data monitor function, providing enhanced malfunction diagnosis and improved serviceability.

Malfunction Detection Function

• The malfunction detection function detects malfunctions in the input/output signal system of the BCM.

DTC table

DTC No.	Description	Detection condition
B1B55:96	Rain sensor internal circuit malfunction	Rain sensor malfunction
B1C53:13	Windshield wiper switch internal circuit malfunction	Windshield wiper switch INT circuit malfunction
B1D06:11	Turn light (LH) circuit malfunction	Short circuit to ground in wiring harness between turn light (LH) and BCM
B1D06:15	Turn light (LH) circuit malfunction	Open circuit or short to power supply in wiring harness between turn light (LH) and BCM
B1D07:11	Turn light (RH) circuit malfunction	Short to ground in wiring harness between turn light (RH) and BCM
B1D07:15	Turn light (RH) circuit malfunction	Open circuit or short to power supply in wiring harness between turn light (RH) and BCM
B1D13:12	Interior light circuit malfunction	Short to power supply in wiring harness between interior light and BCM
B1D35:11	Hazard warning switch circuit malfunction	Short to ground in wiring harness between hazard warning switch and BCM for 10s or more
B1D36:92	Turn switch circuit malfunction	Short to ground in wiring harness between turn switch and BCM
B10A6:92	Light switch circuit malfunction	Short to ground in wiring harness between light switch and BCM
B1008:11	Windshield wiper switch circuit malfunction	Short to ground in wiring harness between wiper and washer switch (windshield wiper INT) and BCM
B1013:23	Rear window defroster switch circuit malfunction	Rear window defroster switch is in a pressed condition for 2 min or more (rear defroster switch stuck)
B1087:83	Rain sensor communication error	Communication error between rain sensor and BCM
B1087:86	Communication error from rain sensor
B1087:87	No response from rain sensor
B1087:88	Rain sensor BUS off
B1172:92	Door lock link switch circuit malfunction	Lock/unlock signals are input simultaneously for 6 s or more
B1175:13	Front door latch switch (driver's side) circuit malfunction	Open circuit in wiring harness between front door latch switch in front door latch and lock actuator (driver's side) and BCM
B1176:13	Front door latch switch (passenger's side) circuit malfunction	Open circuit in wiring harness between front door latch switch in front door latch and lock actuator (passenger's side) and BCM
B1178:11	Liftgate latch switch circuit malfunction	Short to ground in wiring harness between liftgate latch switch in liftgate latch and lock actuator and BCM
U0001:88	Unit communication error	BCM CAN system error
U0028:81	• Communication error with keyless control module (vehicles with advanced keyless and start system) • Communication error with keyless receiver (vehicles with keyless entry system)	• Communication error between keyless control module and BCM (vehicles with advanced keyless and start system) • Communication error between keyless receiver and BCM (vehicles with keyless entry system)
U0028:83	• Error signal from keyless control module (vehicles with advanced keyless and start system) • Error signal from keyless receiver (vehicles with keyless entry system)
U0028:87	• No response from keyless control module (vehicles with advanced keyless and start system) • No response from keyless receiver (vehicles with keyless entry system)
U0100:00	Communication error with PCM	Communication error between PCM and BCM
U0121:00	• Communication error with ABS HU/CM (with ABS) • Communication error with DSC HU/CM (with DSC)	• Communication error between ABS HU/CM and BCM (with ABS) • Communication error between DSC HU/CM and BCM (with DSC)
U0415:68	• Error signal from ABS HU/CM (with ABS) • Error signal from DSC HU/CM (with DSC)	• Correct data cannot be received from ABS HU/CM (with ABS) • Correct data cannot be received from DSC HU/CM (with DSC)
U2100:00	BCM configuration not set	BCM configuration setting not done correctly
U3000:44	BCM configuration setting invalid	BCM configuration setting not done correctly
U3003:16	BCM power supply voltage low (less than 10 V).	BCM power supply voltage less than 10 V
U3003:17	BCM power supply voltage high (16 V or more).	BCM power supply voltage 16 V or more

PID/Data Monitor Function

• The PID/data monitor function is used for optionally selecting input/output signal monitor items preset in the BCM and reading them out in real-time.

PID/DATA monitor item

Unit/Condition

Operation Condition

Inspection item(s)

AUTO_L_SW

Off/On

•  Light switch at AUTO position: On

•  Light switch at position except AUTO: Off

Light switch

BRK_FLUID

Normal/Low

•  Brake fluid level above MIN: Normal

•  Brake fluid level less than MIN: Low

Brake fluid level sensor switch

DRSW_D

Close/Open

•  Driver's door opened: Open

•  Driver's door closed: Close

Door latch switch (driver's side)

DRSW_P

Close/Open

•  Passenger's door opened: Open

•  Passenger's door closed: Close

Door latch switch (passenger's side)

DRSW_RR

Close/Open

•  Rear door (RH) opened: Open

•  Rear door (RH) closed: Close

Door latch switch (rear door (RH))

DRSW_LR

Close/Open

•  Rear door (LH) opened: Open

•  Rear door (LH) closed: Close

Door latch switch (rear door (LH))

D_LLSW_LOCK

Off/Lock

•  Driver's door lock knob locked: Lock

•  Driver's door lock knob unlocked: Off

Door lock-link switch

D_LLSW_UNCK

Off/Unlock

•  Driver's door lock knob unlocked: Unlock

•  Driver's door lock knob locked: Off

Door lock-link switch

DR_LOCK_ACT

Off/Lock

•  Driver's door lock knob locked: Lock

•  Driver's door lock knob unlocked: Off

Door lock actuator

DR_UNLK_ACT

Off/Unlock

•  Driver's door lock knob unlocked: Unlock

•  Driver's door lock knob locked: Off

Door lock actuator

FOG_F_RLY

Off/On

•  Light switch at FRONT FOG position, lights on condition: On

•  Light switch not at FRONT FOG position: Off

Front fog light relay

FOG_R_RLY

Off/On

•  Light switch at REAR FOG position, lights on condition: On

•  Light switch not at REAR FOG position: Off

Rear fog light relay

FOG_F_SW

Off/On

•  Front fog light switch in on position: On

•  Front fog light switch in off position: Off

Light switch

FOG_R_SW

Off/On

•  Rear fog light switch in on position: On

•  Rear fog light switch in off position: Off

Light switch

HAZARD

Off/On

•  Hazard switch in on position: On

•  Hazard switch in off position: Off

Hazard switch

H/L_HI_SW

Off/On

•  Light switch at HI: On

•  Light switch not at HI: Off

Light switch

H/L_LO_SW

Off/On

•  Light switch at LO: On

•  Light switch not at LO: Off

Light switch

H/L_LO_RLY

Off/On

•  Headlights on: On

•  Headlights off: Off

Headlight low relay

IG_KEY_IN

Key-Out/Key-In

•  Key inserted into key cylinder: Key-In

•  Except above: Key-Out

Key reminder switch

KEY_LOCK_SW

Off/On

•  Door key cylinder at LOCK: On

•  Door key cylinder not at LOCK: Off

Door key cylinder switch

OIL_PRS_SW

Off/On

•  Engine running: On

•  Engine stopped: Off

Oil pressure switch

PWR_IG1

Off/On

•  Ignition switch at ON: On

•  Ignition switch is off: Off

Ignition switch

RAIN_SSR

Off/On

•  Intermittent operation control signal from rain sensor sent: On

•  Any control signal such as stop, low or high operation from rain sensor sent: Off

Rain sensor

ROOM_LMP

%

•  Door opened: 100 %

•  Door closed: 0 %

Interior light

R_DEF

Off/On

•  Rear window defroster operating: On

•  Rear window defroster not operating: Off

Filament

R_DEF_SW

Off/On

•  Rear window defroster switch pressed: On

•  Rear window defroster switch not pressed: Off

Climate control unit (rear window defroster switch)

R_DEF_IND

Off/On

•  Rear window defroster indicator illuminated: On

•  Rear window defroster indicator not illuminated: Off

Climate control unit (rear window defroster indicator)

TNS_SW

Off/On

•  Light switch at TNS position: On

•  Light switch not at TNS position: Off

Light switch

TURN_L_L

Off/On

•  Turn light (LH) flashing: On

•  Turn light (LH) off: Off

Turn light

TURN_L_R

Off/On

•  Turn light (RH) flashing: On

•  Turn light (RH) off: Off

Turn light

TURN_SW_L

Off/On

•  Turn switch at left position: On

•  Turn switch in off position: Off

Turn switch (light switch)

TURN_SW_R

Off/On

•  Turn switch at right position: On

•  Turn switch in off position: Off

Turn switch (light switch)

TR/LG_SW

Close/Open

•  Liftgate opened: Open

•  Liftgate closed: Close

Liftgate latch and lock actuator

VSPD

KPH

•  Vehicle driven: Displays vehicle speed

•  Vehicle stopped: 0 km/h (mph)

-

WASHER_F

Off/On

•  Windshield washer switch on: On

•  Windshield washer switch off: Off

Washer switch

WASHER_R

Off/On

•  Rear washer switch on: On

•  Rear washer switch off: Off

Washer switch

WIP_F_INT

Off/On

•  Windshield wiper switch at INT position: On

•  Windshield wiper switch not at INT position: Off

Windshield wiper switch

WIP_F_HI

Off/On

•  Windshield wiper switch at HI position: On

•  Windshield wiper switch not at HI position: Off

Windshield wiper switch

WIP_F_LO

Off/On

•  Windshield wiper switch at LO position: On

•  Windshield wiper switch not at LO position: Off

Windshield wiper switch

WIP_R_ON

Off/On

•  Rear wiper switch at ON: On

•  Rear wiper switch at OFF: Off

Windshield wiper switch

WPRLY_F_HI

Off/On

•  Windshield wiper operating at HI: On

•  Windshield wiper operating in position except HI: Off

Front wiper motor

WPRLY_F_LO

Off/On

•  Windshield wiper operating at LO: On

•  Windshield wiper operating in position except LO: Off

Front wiper motor

WPRLY_R

Off/On

•  Rear wiper operating: On

•  Rear wiper not operating: Off

Rear wiper motor

PID/DATA monitor item	Unit/Condition	Operation Condition	Inspection item(s)
AUTO_L_SW	Off/On	• Light switch at AUTO position: On • Light switch at position except AUTO: Off	Light switch
BRK_FLUID	Normal/Low	• Brake fluid level above MIN: Normal • Brake fluid level less than MIN: Low	Brake fluid level sensor switch
DRSW_D	Close/Open	• Driver's door opened: Open • Driver's door closed: Close	Door latch switch (driver's side)
DRSW_P	Close/Open	• Passenger's door opened: Open • Passenger's door closed: Close	Door latch switch (passenger's side)
DRSW_RR	Close/Open	• Rear door (RH) opened: Open • Rear door (RH) closed: Close	Door latch switch (rear door (RH))
DRSW_LR	Close/Open	• Rear door (LH) opened: Open • Rear door (LH) closed: Close	Door latch switch (rear door (LH))
D_LLSW_LOCK	Off/Lock	• Driver's door lock knob locked: Lock • Driver's door lock knob unlocked: Off	Door lock-link switch
D_LLSW_UNCK	Off/Unlock	• Driver's door lock knob unlocked: Unlock • Driver's door lock knob locked: Off	Door lock-link switch
DR_LOCK_ACT	Off/Lock	• Driver's door lock knob locked: Lock • Driver's door lock knob unlocked: Off	Door lock actuator
DR_UNLK_ACT	Off/Unlock	• Driver's door lock knob unlocked: Unlock • Driver's door lock knob locked: Off	Door lock actuator
FOG_F_RLY	Off/On	• Light switch at FRONT FOG position, lights on condition: On • Light switch not at FRONT FOG position: Off	Front fog light relay
FOG_R_RLY	Off/On	• Light switch at REAR FOG position, lights on condition: On • Light switch not at REAR FOG position: Off	Rear fog light relay
FOG_F_SW	Off/On	• Front fog light switch in on position: On • Front fog light switch in off position: Off	Light switch
FOG_R_SW	Off/On	• Rear fog light switch in on position: On • Rear fog light switch in off position: Off	Light switch
HAZARD	Off/On	• Hazard switch in on position: On • Hazard switch in off position: Off	Hazard switch
H/L_HI_SW	Off/On	• Light switch at HI: On • Light switch not at HI: Off	Light switch
H/L_LO_SW	Off/On	• Light switch at LO: On • Light switch not at LO: Off	Light switch
H/L_LO_RLY	Off/On	• Headlights on: On • Headlights off: Off	Headlight low relay
IG_KEY_IN	Key-Out/Key-In	• Key inserted into key cylinder: Key-In • Except above: Key-Out	Key reminder switch
KEY_LOCK_SW	Off/On	• Door key cylinder at LOCK: On • Door key cylinder not at LOCK: Off	Door key cylinder switch
OIL_PRS_SW	Off/On	• Engine running: On • Engine stopped: Off	Oil pressure switch
PWR_IG1	Off/On	• Ignition switch at ON: On • Ignition switch is off: Off	Ignition switch
RAIN_SSR	Off/On	• Intermittent operation control signal from rain sensor sent: On • Any control signal such as stop, low or high operation from rain sensor sent: Off	Rain sensor
ROOM_LMP	%	• Door opened: 100 % • Door closed: 0 %	Interior light
R_DEF	Off/On	• Rear window defroster operating: On • Rear window defroster not operating: Off	Filament
R_DEF_SW	Off/On	• Rear window defroster switch pressed: On • Rear window defroster switch not pressed: Off	Climate control unit (rear window defroster switch)
R_DEF_IND	Off/On	• Rear window defroster indicator illuminated: On • Rear window defroster indicator not illuminated: Off	Climate control unit (rear window defroster indicator)
TNS_SW	Off/On	• Light switch at TNS position: On • Light switch not at TNS position: Off	Light switch
TURN_L_L	Off/On	• Turn light (LH) flashing: On • Turn light (LH) off: Off	Turn light
TURN_L_R	Off/On	• Turn light (RH) flashing: On • Turn light (RH) off: Off	Turn light
TURN_SW_L	Off/On	• Turn switch at left position: On • Turn switch in off position: Off	Turn switch (light switch)
TURN_SW_R	Off/On	• Turn switch at right position: On • Turn switch in off position: Off	Turn switch (light switch)
TR/LG_SW	Close/Open	• Liftgate opened: Open • Liftgate closed: Close	Liftgate latch and lock actuator
VSPD	KPH	• Vehicle driven: Displays vehicle speed • Vehicle stopped: 0 km/h (mph)	-
WASHER_F	Off/On	• Windshield washer switch on: On • Windshield washer switch off: Off	Washer switch
WASHER_R	Off/On	• Rear washer switch on: On • Rear washer switch off: Off	Washer switch
WIP_F_INT	Off/On	• Windshield wiper switch at INT position: On • Windshield wiper switch not at INT position: Off	Windshield wiper switch
WIP_F_HI	Off/On	• Windshield wiper switch at HI position: On • Windshield wiper switch not at HI position: Off	Windshield wiper switch
WIP_F_LO	Off/On	• Windshield wiper switch at LO position: On • Windshield wiper switch not at LO position: Off	Windshield wiper switch
WIP_R_ON	Off/On	• Rear wiper switch at ON: On • Rear wiper switch at OFF: Off	Windshield wiper switch
WPRLY_F_HI	Off/On	• Windshield wiper operating at HI: On • Windshield wiper operating in position except HI: Off	Front wiper motor
WPRLY_F_LO	Off/On	• Windshield wiper operating at LO: On • Windshield wiper operating in position except LO: Off	Front wiper motor
WPRLY_R	Off/On	• Rear wiper operating: On • Rear wiper not operating: Off	Rear wiper motor