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

id094000104300

•  The on-board diagnostic system consists of a malfunction detection system that detects abnormalities in input/output signals and 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 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.
am3uun00001099

DTC No.

Description
B1C45:12
Windshield wiper park position switch circuit malfunction
B1D35:11
Hazard warning switch circuit malfunction
B1D36:11
Turn switch circuit malfunction
B10D0:11
Trunk lid opener switch (4SD)/liftgate opener switch (5HB) circuit malfunction
B1007:11
Headlight high circuit malfunction
B1008:11
Windshield wiper mode switch circuit malfunction
B1013:11
Rear window defroster switch circuit malfunction
B1046:11
Front fog light switch circuit malfunction
B1048:13
Brake fluid level sensor circuit malfunction
B1051:11
Windshield washer switch circuit malfunction
B1052:11*1
Rear washer switch circuit malfunction
B1079:13*2
Hood latch switch circuit malfunction
B108F:16*3
Door lock switch circuit malfunction
B109E:83*4
Keyless receiver circuit malfunction
B109E:87*4
Keyless receiver circuit malfunction
B11C0:13
Rear door latch switch (LH) circuit malfunction
B11C1:13
Rear door latch switch (RH) circuit malfunction
B11DA:16*5
Front door key cylinder switch (LH) circuit malfunction
B11DC:11*1
Rear wiper mode switch circuit malfunction
B1172:11*5
Door lock-link switch (LF) circuit malfunction
B1172:13*5
Door lock-link switch (LF) circuit malfunction
B1174:11*5
Door lock-link switch (RF/LR/RR) circuit malfunction
B1174:13*5
Door lock-link switch (RF/LR/RR) circuit malfunction
B1175:13
Front door latch switch (LH) circuit malfunction
B1176:13
Front door latch switch (RH) circuit malfunction
B1178:11
4SD
•  Trunk lid latch switch circuit malfunction
5HB
•  Liftgate latch switch circuit malfunction
B126A:11*5
Door lock-link switch (LF) circuit malfunction
B126A:13*5
Door lock-link switch (LF) circuit malfunction
C0051:04*6
Steering angle sensor internal malfunction
C0051:2F*6
Erratic signal of steering angle sensor
C0052:11*6
Steering angle sensor A signal input circuit error
C0052:13*6
C0053:11*6
Steering angle sensor B signal input circuit error
C0053:13*6
C0054:11*6
Steering angle sensor C signal input circuit error
C0054:13*6
C0055:11*6
Steering angle sensor Z signal input circuit error
C0055:13*6
C1126:13
TNS switch circuit malfunction
C1137:12
ATX
•  TR switch circuit malfunction
MTX
•  Back-up light switch circuit malfunction
P0070:14
Ambient temperature sensor circuit malfunction
P1536:13
Parking brake switch circuit malfunction
U0001:88
Unit communication error (HS–CAN)
U0100:00
Communication error with PCM
U0101:00*7
Communication error with TCM
U0151:00
Communication error with SAS control module
U0214:00*8
Communication error with keyless control module
U0300:00
Incomplete configuration
U0401:68
Receive erratic data from PCM
U2100:00
Incomplete configuration
U3000:04
BCM internal malfunction
U3003:16
Power supply circuit malfunction
U3003:17
Power supply circuit malfunction

*1  :5HB
*2  :Vehicles with theft-deterrent system
*3  :Vehicles with door lock switch
*4  :Vehicles with keyless entry system or advanced keyless entry and push button start system
*5  :Vehicles with power door lock system
*6  :Vehicles with steering angle sensor
*7  :ATX
*8  :Vehicles with advanced keyless entry and push button start system

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 Name

Unit/Status

Description

Inspection Item

Terminal
BRK_FLUID
Normal/Low
•  Brake fluid level above MIN: Normal
•  Brake fluid level less than MIN: Low
Brake fluid level sensor
1N
DRSW_D
Close/Open
•  Driver-side door opened: Open
•  Driver-side door closed: Close
Front door latch switch (driver-side)
6G
DRSW_LR
Close/Open
•  Rear door (LH) opened: Open
•  Rear door (LH) closed: Close
Rear door latch switch (LH)
6E
DRSW_P
Close/Open
•  Passenger-side door opened: Open
•  Passenger-side door closed: Close
Front door latch switch (passenger-side)
6H
DRSW_RR
Close/Open
•  Rear door (RH) opened: Open
•  Rear door (RH) closed: Close
Rear door latch switch (RH)
6K
FOG_F_SW
Off/On
•  Front fog light switch in on position: On
•  Front fog light switch in off position: Off
Front fog light switch (light switch)
2W
FOG_R_SW
Off/On
•  Rear fog light switch in on position: On
•  Rear fog light switch in off position: Off
Rear fog light switch (light switch)
2S
HAZARD
Off/On
•  Hazard warning switch in on position: On
•  Hazard warning switch in off position: Off
Hazard warning switch
2M
HOOD_SW*1
Close/Open
•  Bonnet opened: Open
•  Bonnet closed: Close
Bonnet latch switch
1J
H/L_HI_SW
Off/On
•  Light switch at HI position: On
•  Light switch at off position: Off
Light switch
1T
KEY_LOCK_SW
Off/Lock
•  Front door key cylinder switch at LOCK: Lock
•  Front door key cylinder switch not at LOCK: Off
Front door key cylinder switch
6B
KEY_UNLK_SW
Off/Unlock
•  Front door key cylinder switch at UNLOCK: Off
•  Front door key cylinder switch not at UNLOCK: Unlock
Front door key cylinder switch
6B
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
2Q
R_DEF_SW*3
Off/On
•  Rear window defroster switch pressed and held: On
•  Rear window defroster switch not pressed: Off
Rear window defroster relay
-
R_GEAR_SW
Not_R/R
•  Shift the selector lever to R position: R
•  Other than these conditions: Not_R
TR switch (ATX)/
Back-up light switch (MTX)
1Q
TNS_SW
Off/On
•  Light switch at TNS position: On
•  Light switch at off position: Off
Light switch
-
TURN_SW_L
Off/On
•  Turn switch at left position: On
•  Turn switch in off position: Off
Turn switch (light switch)
2P
TURN_SW_R
Off/On
•  Turn switch at right position: On
•  Turn switch in off position: Off
Turn switch (light switch)
2O
TR/LG_SW
Close/Open
•  Trunk (4SD)/Liftgate (5HB) lid opened: Open
•  Trunk (4SD)/Liftgate (5HB) lid closed: Close
Trunk lid latch switch (4SD)/
Liftgate latch switch (5HB)
6F
VPWR
V
•  Indicate the battery voltage
Battery
3J, 4S
WASHER_F
Off/On
•  Windshield washer switch in on position: On
•  Windshield washer switch in off position: Off
Wiper and washer switch
3A
WASHER_R*2
Off/On
•  Rear washer switch in on position: On
•  Rear washer switch in off position: Off
Wiper and washer switch
4O
WIP_F_HI
Off/On
•  Windshield wiper switch at HI position: On
•  Windshield wiper switch at off position: Off
Wiper and washer switch
4M
WIP_F_INT
Off/On
•  Windshield wiper switch at INT position: On
•  Windshield wiper switch at off position: Off
Wiper and washer switch
4I
WIP_F_LO
Off/On
•  Windshield wiper switch at LO position: On
•  Windshield wiper switch at off position: Off
Wiper and washer switch
4J
WIP_F_PPOS
Off/On
•  Windshield wiper auto stop switch in on position: On
•  Windshield wiper auto stop switch in off position: Off
Windshield wiper motor
3G
WIP_R_INT*2
Off/On
•  Rear wiper switch at INT position: On
•  Rear wiper switch at off position: Off
Wiper and washer switch
2K
WIP_R_ON*2
Off/On
•  Rear wiper switch at on position: On
•  Rear wiper switch at off position: Off
Wiper and washer switch
2L

*1  :Vehicles with theft-deterrent system
*2  :Vehicles with rear wiper and washer switch
*3  :Vehicles with manual air conditioner