ON-BOARD DIAGNOSTIC FUNCTION

id080200100500

Self-Malfunction Diagnostic Function

Malfunction detection function

  • Detects overall malfunctions in the air bag system-related parts.

Fail-safe function

  • If the SAS control module performance/function cannot be maintained due to any cause, the fail-safe function stops air bag system control and flashes the air bag system warning light to prevent the air bags from operating (deploying) accidentally.

Memory function

  • Stores malfunctions in the air bag system-related parts detected by the malfunction detection function, and the stored malfunction contents are not cleared even if the ignition switch is turned to the OFF position or the negative battery cable is disconnection.

Display function

  • When the malfunction detection function detects a malfunction, the air bag system warning light illuminates to advise the driver. Using the external tester communication function, DTCs can be output to the DLC-2 via the K-Line.

DTC table

DTC | System malfunction location
--- | ---
Mazda Modular Diagnostic System (M-MDS) display | Air bag system warning light
Flashing pattern | Priority ranking
B1046 | 24 |  | 18 | Driver-side curtain air bag module and other air bag module circuits short
B1047 | 22 |  | 16 | Driver-side side air bag module and other air bag module circuits short
B1048 | 21 |  | 11 | Passenger-side air bag module and other air bag module circuits short
B1049 | 34 |  | 13 | Passenger-side pre-tensioner seat belt and other air bag module circuits short
B104B | 43 |  | 8 | Driver-side side air bag sensor No. 1 and other sensor circuits short to power supply
B104C | 44 |  | 7 | Passenger-side side air bag sensor No.1 and other sensor circuits short to power supply
B104D | 42 |  | 6 | Crash zone sensor and other sensor circuits short to power supply
B104E | 43 |  | 8 | Driver-side side air bag sensor No.1 circuit open or short
B104F | 44 |  | 7 | Passenger-side side air bag sensor No.1 (internal circuit abnormal)
B1050 | Passenger-side side air bag sensor No.1 circuit open or short
B1051 | 43 |  | 8 | Driver-side side air bag sensor No.1 (internal circuit abnormal)
B1054 | 33 |  | 14 | Driver-side pre-tensioner seat belt and other air bag module circuits short
B1055 | 23 |  | 15 | Passenger-side side air bag module and other air bag module circuits short
B1056 | 25 |  | 17 | Passenger-side curtain air bag module and other air bag module circuits short
B1057 | 19 |  | 12 | Driver-side air bag module and other air bag module circuits short
B105B | 45 |  | 10 | Driver-side side air bag sensor No. 2 and other sensor circuits short to power supply
B105F | 46 |  | 9 | Passenger-side side air bag sensor No. 2 and other sensor circuits short to power supply
B110C | 45 |  | 10 | Driver-side side air bag sensor No. 2 circuit open or short
B110D | 46 |  | 9 | Passenger-side side air bag sensor No. 2 circuit open or short
B110E | 45 |  | 10 | Driver-side side air bag sensor No.2 ID mismatch
B110F | 46 |  | 9 | Passenger-side side air bag sensor No.2 ID mismatch
B1144 | 45 |  | 10 | Driver-side side air bag sensor No. 2 (internal circuit abnormal)
B1145 | Driver-side side air bag sensor No. 2 (communication error)
B1146 | 46 |  | 9 | Passenger-side side air bag sensor No. 2 (internal circuit abnormal)
B1147 | Passenger-side side air bag sensor No. 2 (communication error)
B1231 | 13 |  | 3 | SAS control module activation (deployment) control freeze
B1317 | - | Continuously illuminated | 1 | SAS control module power supply voltage increases (18.1 V or more)
B1318 | SAS control module power supply voltage decreases (less than 8 V)
B1342 | 12 |  | 2 | SAS control module (internal circuit abnormal)
- | Continuously illuminated | 1
B1868 | - | Continuously illuminated | 1 | Air bag system warning light malfunction
B1877 | 33 |  | 14 | Driver-side pre-tensioner seat belt circuit resistance high
B1878 | Driver-side pre-tensioner seat belt circuit short to power supply
B1879 | Driver-side pre-tensioner seat belt circuit short to body ground
B1881 | 34 |  | 13 | Passenger-side pre-tensioner seat belt circuit resistance high
B1882 | Passenger-side pre-tensioner seat belt circuit short to power supply
B1883 | Passenger-side pre-tensioner seat belt circuit short to body ground
B1885 | 33 |  | 14 | Driver-side pre-tensioner seat belt circuit resistance low
B1886 | 34 |  | 13 | Passenger-side pre-tensioner seat belt circuit resistance low
B1916 | 19 |  | 12 | Driver-side air bag module circuit short to power supply
B1925 | 21 |  | 11 | Passenger-side air bag module circuit short to power supply
B1932 | 19 |  | 12 | Driver-side air bag module circuit resistance high
B1933 | 21 |  | 11 | Passenger-side air bag module circuit resistance high
B1934 | 19 |  | 12 | Driver-side air bag module circuit resistance low
B1935 | 21 |  | 11 | Passenger-side air bag module circuit resistance low
B1936 | 19 |  | 12 | Driver-side air bag module circuit short to body ground
B1938 | 21 |  | 11 | Passenger-side air bag module circuit short to body ground
B1992 | 22 |  | 16 | Driver-side side air bag module circuit short to power supply
B1993 | Driver-side side air bag module circuit short to body ground
B1994 | Driver-side side air bag module circuit resistance high
B1995 | Driver-side side air bag module circuit resistance low
B1996 | 23 |  | 15 | Passenger-side side air bag module circuit short to power supply
B1997 | Passenger-side side air bag module circuit short to body ground
B1998 | Passenger-side side air bag module circuit resistance high
B1999 | Passenger-side side air bag module circuit resistance low
B2226 | 42 |  | 6 | Crash zone sensor (internal circuit abnormal)
B2227 | Crash zone sensor (communication error)
B2477 | 54 |  | 5 | Configuration error
- | Flashing | 4 | Configuration not set
B2773 | 24 |  | 18 | Driver-side curtain air bag module circuit resistance low
B2774 | Driver-side curtain air bag module circuit resistance high
B2775 | Driver-side curtain air bag module circuit short to body ground
B2776 | Driver-side curtain air bag module circuit short to power supply
B2777 | 25 |  | 17 | Passenger-side curtain air bag module circuit resistance low
B2778 | Passenger-side curtain air bag module circuit resistance high
B2779 | Passenger-side curtain air bag module circuit short to body ground
B2780 | Passenger-side curtain air bag module circuit short to power supply
B2855 | 42 |  | 6 | Crash zone sensor circuit short
B2856 | Crash zone sensor ID mismatch
B2886 | 44 |  | 7 | Passenger-side side air bag sensor No.1 ID mismatch
B2887 | 43 |  | 8 | Driver-side side air bag sensor No.1 ID mismatch
C1280 | - | - | - | Yaw rate sensor in SAS control module is signal error
C1282 | - | - | - | Low-G (XY) sensor (lateral-G) in SAS control module is signal error
C1516 | 12 |  | 2 | Roll rate sensor in SAS control module is signal error
C2770 | - | - | - | Low-G (XY) sensor (forward-G) in SAS control module is signal error
U2017 | 43 |  | 8 | Driver-side side air bag sensor No. 1 (communication error)
U2018 | 44 |  | 7 | Passenger-side side air bag sensor No. 1 (communication error)
U0073 | - | Continuously illuminated | 1 | CAN system communication error
U0155 | Communication error to instrument cluster
U2527 | - | - | - | DSC/RSC HU/CM communication fault

PID/Data Monitoring Function

• By using the PID/data monitoring function, the monitored item of the input/output signal, as set on the SAS control module, can be freely selected and read out in real-time.
• The Mazda Modular Diagnostic System (M-MDS) is used to read out PID/data monitor information.

PID/data monitor table

PID name (definition) | Operation Condition (Reference) | Unit/Condition
--- | --- | ---
BUCKLE_D | Driver-side buckle switch status | Unbuckled/Buckled
BUCKLE_P | Passenger-side buckle switch status | Unbuckled/Buckled
CCNT_RCM | Number of continuous DTCs | ―
IGN_V | IG1 voltage | V
P_BELT_SSR | Occupancy sensor status | On/Off
PSAB_DepSt | Passenger-side air bag module deployment status | Inactive/Active
RES_AB_D | Driver-side air bag module resistance | ohm
RES_AB_P | Passenger-side air bag module resistance | ohm
RES_CAB_D | Driver-side curtain air bag module resistance | ohm
RES_CAB_P | Passenger-side curtain air bag module resistance | ohm
RES_PT_D | Driver-side pre-tensioner seat belt resistance | ohm
RES_PT_P | Passenger-side pre-tensioner seat belt resistance | ohm
RES_SAB_D | Driver-side side air bag module resistance | ohm
RES_SAB_P | Passenger-side side air bag module resistance | ohm