ON-BOARD DIAGNOSTIC FUNCTION [BODY CONTROL MODULE (BCM)]

• 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.

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

DTC No.	Description	Detection condition
B1C45:12	Autostop switch circuit malfunction	Short circuit to power supply in wiring harness between windshield wiper motor and BCM
B1D35:11	Hazard warning switch circuit malfunction	Short to ground detected in hazard warning switch circuit with the hazard warning switch off
B1D36:11	Turn switch circuit malfunction	Short to ground detected in turn switch LH or RH circuit with the turn switch off
B10A5:49	Theft-deterrent siren internal malfunction	Theft-deterrent siren internal malfunction
B10A5:86	Signal error from theft-deterrent siren	Signal error from theft-deterrent siren
B10A5:87	Communication error between theft-deterrent siren and BCM	Communication error between theft-deterrent siren and BCM
B10D0:11	Trunk lid opener switch (4SD) /liftgate opener switch (5HB) circuit malfunction	Short to ground detected in trunk lid opener switch (4SD) /liftgate opener switch (5HB) circuit with the ignition switch on
B1007:12	Headlight high beam circuit malfunction	Short to power supply detected in headlight high beam circuit with the light switch off
B1008:11	Windshield wiper switch circuit malfunction	Short to ground detected in windshield wiper switch circuit with the windshield wiper switch off
B1047:11	Rear fog light switch circuit malfunction	Short to ground detected in rear fog light switch circuit with the rear fog light switch off
B1048:11	Brake fluid level sensor circuit malfunction	Short to ground in brake fluid level sensor circuit with the brake fluid amount on the upper side of the minimum
B1051:11	Windshield washer switch circuit malfunction	Short to ground detected in windshield washer switch circuit with the windshield washer switch off
B1052:11	Rear washer switch circuit malfunction	Short to ground detected in rear washer switch circuit with the rear washer switch off
B1079:13	Bonnet latch switch circuit malfunction	Open circuit detected in bonnet latch switch circuit with the bonnet closed (bonnet latch switch on)
B109F:49	Intruder sensor internal malfunction	Intruder sensor internal malfunction
B109F:86	Signal error from intruder sensor	Signal error from intruder sensor
B109F:87	Communication error between intruder sensor and BCM	Communication error between intruder sensor and BCM
B11C0:13	Driver’s side rear door latch switch circuit malfunction	Open circuit detected in driver’s side rear door latch switch with the rear door (driver’s side) closed (driver’s side rear door latch switch on)
B11C1:13	Passenger’s side rear door latch switch circuit malfunction	Open circuit detected in passenger’s side rear door latch switch circuit with the rear door (passenger’s side) closed (passenger's side rear door latch switch on)
B11DA:11	Front door key cylinder switch (driver’s side) circuit malfunction	Short to ground detected in front door key cylinder switch (driver’s side) circuit with the front door key cylinder switch (driver’s side) off
B11DC:11	Rear wiper switch circuit malfunction	Short to ground in rear wiper switch circuit with the rear wiper switch off
B1172:11	Front door lock-link switch (driver’s side) circuit malfunction	Short to ground in front door lock-link switch (driver’s side) lock-side circuit with the front door lock-link switch (driver’s side) unlocked
B1172:13	Front door lock-link switch (driver’s side) circuit malfunction	Open circuit detected in front door lock-link switch (driver’s side) unlock-side circuit with the front door lock-link switch (driver’s side) unlocked
B1174:13	Door lock-link switch circuit malfunction	Open circuit detected in door lock-link switch unlock-side circuit with the door lock-link switch unlocked
B1175:13	Front door latch switch (driver’s side) circuit malfunction	Open circuit detected in front door latch switch (driver’s side) circuit with the front driver’s door closed (front door latch switch {driver’s side} on)
B1176:13	Front door latch switch (passenger’s side) circuit malfunction	Open circuit detected in front door latch switch (passenger’s side) circuit with the front passenger’s door closed (front door latch switch {passenger’s side} on)
B1178:11	Trunk lid switch (4SD) /liftgate latch switch (5HB) circuit malfunction	Short to ground detected in trunk lid latch switch circuit with the trunk closed (trunk lid latch switch off)
C0051:04	• Sensor Z-signal input circuit malfunction • Steering angle overflow	• Z-signal does not change • Detected steering angle exceeds the specified value
C0051:2F	Steering angle signal error	Errors detected in a combination of signals from each sensor (A, B, C, D)
C0052:11	Sensor A signal input circuit error	Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected
C0052:13	Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected
C0053:11	Sensor B signal input circuit error	Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected
C0053:13	Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected
C0054:11	Sensor C signal input circuit error	Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected
C0054:13	Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected
C0055:11	Sensor D signal input circuit error	Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected
C0055:13	Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected
C1137:12	TR switch (ATX) /back-up light switch (MTX) circuit malfunction	Short to ground in transaxle range switch (ATX) /back-up light switch (MTX) circuit with the shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on)
P1536:13	Parking brake switch circuit malfunction	Open circuit detected in parking brake switch circuit with the parking brake lever applied (parking brake switch on)
U0001:88	Unit communication error (HS–CAN)	CAN system error with BCM
U0100:00	PCM communication error	Communication error between PCM and BCM
U0101:00	TCM communication error	Communication error between TCM and BCM
U0151:00	SAS control module communication error	Communication error between SAS control module and BCM
U0214:00	Keyless control module communication error	Communication error between keyless control module and BCM
U0300:00	BCM configuration setting invalid	Caution • Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. • BCM configuration setting not done correctly
U0401:68	Correct data cannot be received from PCM	Correct data cannot be received from PCM
U0402:68	Correct data cannot be received from TCM	Correct data cannot be received from TCM
U2100:00	BCM configuration not set	Caution • Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure. • BCM configuration setting not done correctly
U3000:04	BCM internal malfunction	BCM internal malfunction
U3003:16	BCM power supply voltage malfunction	DTC U3003:16 BCM power supply voltage low (less than 10 V)
U3003:17	DTC U3003:17 BCM power supply voltage increases (16 V or more)

DTC No.

Description

Detection condition

B1C45:12

Autostop switch circuit malfunction

Short circuit to power supply in wiring harness between windshield wiper motor and BCM

B1D35:11

Hazard warning switch circuit malfunction

Short to ground detected in hazard warning switch circuit with the hazard warning switch off

B1D36:11

Turn switch circuit malfunction

Short to ground detected in turn switch LH or RH circuit with the turn switch off

B10A5:49

Theft-deterrent siren internal malfunction

B10A5:86

Signal error from theft-deterrent siren

B10A5:87

Communication error between theft-deterrent siren and BCM

B10D0:11

Trunk lid opener switch (4SD) /liftgate opener switch (5HB) circuit malfunction

Short to ground detected in trunk lid opener switch (4SD) /liftgate opener switch (5HB) circuit with the ignition switch on

B1007:12

Headlight high beam circuit malfunction

Short to power supply detected in headlight high beam circuit with the light switch off

B1008:11

Windshield wiper switch circuit malfunction

Short to ground detected in windshield wiper switch circuit with the windshield wiper switch off

B1047:11

Rear fog light switch circuit malfunction

Short to ground detected in rear fog light switch circuit with the rear fog light switch off

B1048:11

Brake fluid level sensor circuit malfunction

Short to ground in brake fluid level sensor circuit with the brake fluid amount on the upper side of the minimum

B1051:11

Windshield washer switch circuit malfunction

Short to ground detected in windshield washer switch circuit with the windshield washer switch off

B1052:11

Rear washer switch circuit malfunction

Short to ground detected in rear washer switch circuit with the rear washer switch off

B1079:13

Bonnet latch switch circuit malfunction

Open circuit detected in bonnet latch switch circuit with the bonnet closed (bonnet latch switch on)

B109F:49

Intruder sensor internal malfunction

B109F:86

Signal error from intruder sensor

B109F:87

Communication error between intruder sensor and BCM

B11C0:13

Driver’s side rear door latch switch circuit malfunction

Open circuit detected in driver’s side rear door latch switch with the rear door (driver’s side) closed (driver’s side rear door latch switch on)

B11C1:13

Passenger’s side rear door latch switch circuit malfunction

Open circuit detected in passenger’s side rear door latch switch circuit with the rear door (passenger’s side) closed (passenger's side rear door latch switch on)

B11DA:11

Front door key cylinder switch (driver’s side) circuit malfunction

Short to ground detected in front door key cylinder switch (driver’s side) circuit with the front door key cylinder switch (driver’s side) off

B11DC:11

Rear wiper switch circuit malfunction

Short to ground in rear wiper switch circuit with the rear wiper switch off

B1172:11

Front door lock-link switch (driver’s side) circuit malfunction

Short to ground in front door lock-link switch (driver’s side) lock-side circuit with the front door lock-link switch (driver’s side) unlocked

B1172:13

Front door lock-link switch (driver’s side) circuit malfunction

Open circuit detected in front door lock-link switch (driver’s side) unlock-side circuit with the front door lock-link switch (driver’s side) unlocked

B1174:13

Door lock-link switch circuit malfunction

Open circuit detected in door lock-link switch unlock-side circuit with the door lock-link switch unlocked

B1175:13

Front door latch switch (driver’s side) circuit malfunction

Open circuit detected in front door latch switch (driver’s side) circuit with the front driver’s door closed (front door latch switch {driver’s side} on)

B1176:13

Front door latch switch (passenger’s side) circuit malfunction

Open circuit detected in front door latch switch (passenger’s side) circuit with the front passenger’s door closed (front door latch switch {passenger’s side} on)

B1178:11

Trunk lid switch (4SD) /liftgate latch switch (5HB) circuit malfunction

Short to ground detected in trunk lid latch switch circuit with the trunk closed (trunk lid latch switch off)

C0051:04

• Sensor Z-signal input circuit malfunction

• Steering angle overflow

• Z-signal does not change

• Detected steering angle exceeds the specified value

C0051:2F

Steering angle signal error

Errors detected in a combination of signals from each sensor (A, B, C, D)

C0052:11

Sensor A signal input circuit error

Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected

C0052:13

Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected

C0053:11

Sensor B signal input circuit error

Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected

C0053:13

Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected

C0054:11

Sensor C signal input circuit error

Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected

C0054:13

Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected

C0055:11

Sensor D signal input circuit error

Voltage lower than the specification is detected for 0.1 s with the steering angle sensor connected

C0055:13

Voltage higher than the specification is detected for 0.1 s with the steering angle sensor connected

C1137:12

TR switch (ATX) /back-up light switch (MTX) circuit malfunction

Short to ground in transaxle range switch (ATX) /back-up light switch (MTX) circuit with the shift lever in R position (transaxle range switch {ATX} /back-up light switch {MTX} on)

P1536:13

Parking brake switch circuit malfunction

Open circuit detected in parking brake switch circuit with the parking brake lever applied (parking brake switch on)

U0001:88

Unit communication error (HS–CAN)

CAN system error with BCM

U0100:00

PCM communication error

Communication error between PCM and BCM

U0101:00

TCM communication error

Communication error between TCM and BCM

U0151:00

SAS control module communication error

Communication error between SAS control module and BCM

U0214:00

Keyless control module communication error

Communication error between keyless control module and BCM

U0300:00

BCM configuration setting invalid

Caution

• Detection conditions are for understanding the DTC outline before performing an inspection. Performing an inspection according to only the detection conditions may cause injury due to an operating error, or damage the system. When performing an inspection, always follow the inspection procedure.

• BCM configuration setting not done correctly

U0401:68

Correct data cannot be received from PCM

U0402:68

Correct data cannot be received from TCM

U2100:00

BCM configuration not set

Caution

• BCM configuration setting not done correctly

U3000:04

BCM internal malfunction

U3003:16

BCM power supply voltage malfunction

DTC U3003:16 BCM power supply voltage low (less than 10 V)

U3003:17

DTC U3003:17 BCM power supply voltage increases (16 V or more)

• 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 (Tester display)	Operation Condition	Inspection item (s)
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)
FOG_R_SW	Off/On	• Light switch at TNS or ON and 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
HOOD_SW^*	Close/Open	• Bonnet opened: Open • Bonnet closed: Close	Bonnet latch switch
KEY_LOCK_SW	Off/Lock	• Door key cylinder at LOCK: Lock • Door key cylinder not at LOCK: Off	Door key cylinder switch
KEY_UNLK_SW	Off/Unlock	• Door key cylinder at LOCK: Off • Door key cylinder not at LOCK: Unlock	Door key cylinder switch
PRK_BRK	Off/On	• Parking brake depressed (Parking brake switch in the on position): On • Parking brake not depressed (Parking brake switch in the off position): Off	Parking brake switch
R_GEAR_SW	Not_R/R	• Shift the selector lever to R position: R • Other than these conditions: Not_R	TR switch
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
VPWR	V	Indicate the battery voltage	Battery inspection
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_PPOS	Off/On	• Windshield wiper not operating: On • Windshield wiper operating: 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