ON-BOARD DIAGNOSTIC FUNCTION [AIR BAG SYSTEM]

id0802a0100500

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 LOCK 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
B1047 | 22 |  | 6 | Driver-side side air bag module assembly incorrect
B104B | 63 |  | 11 | Driver-side side air bag sensor assembly incorrect
B104C | 64 |  | 12 | Passenger-side side air bag sensor assembly incorrect
B104D | 42 |  | 10 | Crash zone sensor assembly incorrect
B104F | 64 |  | 12 | Passenger-side air bag sensor system internal circuit disabled
B1051 | 63 |  | 11 | Driver-side side air bag sensor system internal circuit disabled
B1055 | 23 |  | 7 | Passenger-side side air bag module assembly incorrect
B1058 | 19 |  | 4 | Driver-side air bag module assembly incorrect
B2228
B2230
B2232
B2234
B1059 | 21 |  | 5 | Passenger-side air bag module assembly incorrect
B2229
B2231
B2233
B2235
B1318 | — | Continuously illuminated | — | SAS control module power supply voltage decreases (less than 9 V)
B1342 | 12 |  | 3 | SAS control module
B1869 | — | Continuously illuminated | — | Air bag system warning light circuit open
— | Does not illuminate | — | Air bag system warning light circuit short to body ground
B1871 | 56 |  | 12 | Passenger air bag deactivation (PAD) switch system circuit disabled
B1877 | 33 |  | 8 | Driver-side pre-tensioner seat belt circuit open circuit or 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 |  | 9 | Passenger-side pre-tensioner seat belt circuit open circuit or 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
B1884 | 18 |  | 13 | Passenger air bag deactivation (PAD) indicator circuit open or short to body ground
B1885 | 33 |  | 8 | Driver-side pre-tensioner seat belt circuit resistance low
B1886 | 34 |  | 9 | Passenger-side pre-tensioner seat belt circuit resistance low
B1916 | 19 |  | 4 | Driver-side air bag module circuit short to power supply
B1925 | 21 |  | 5 | Passenger-side air bag module circuit short to power supply
B1932 | 19 |  | 4 | Driver-side air bag module circuit open circuit or resistance high
B1933 | 21 |  | 5 | Passenger-side air bag module circuit open circuit or resistance high
B1934 | 19 |  | 4 | Driver-side air bag module circuit resistance low
B1935 | 21 |  | 5 | Passenger-side air bag module circuit resistance low
B1936 | 19 |  | 4 | Driver-side air bag module circuit short to body ground
B1938 | 21 |  | 5 | Passenger-side air bag module circuit short to body ground
B1992 | 22 |  | 6 | 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 open circuit or resistance high
B1995 | Driver-side side air bag module circuit resistance low
B1996 | 23 |  | 7 | 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 open circuit or resistance high
B1999 | Passenger-side side air bag module circuit resistance low
B2226 | 42 |  | 10 | Crash zone sensor internal circuit disabled
B2227 | Crash zone sensor system communication error
B2477 | 54 |  | 1 | Configuration error
B2856 | 42 |  | 10 | Crash zone sensor system communication data error
B2867 | 31 |  | 2 | Poor connection of any SAS control module connectors
B2886 | 64 |  | 12 | Passenger-side air bag sensor system communication data error
B2887 | 63 |  | 11 | Driver-side air bag sensor system communication data error
U2017 | 63 |  | 11 | Driver-side side air bag sensor system communication error
U2018 | 64 |  | 12 | Passenger-side side air bag sensor system communication error

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) | Unit/Condition | Operation Condition (Reference) | Terminal
--- | --- | --- | ---
CCNT_RCM (Number of continuous DTCs) | — | • DTCs detected: 1—255 • No DTCs detected: 0 | —
CR2D_Comm (Driver-side side air bag sensor system communication data error) | OK/ FAULT | • Sensor normal: OK • Sensor communication malfunction: FAULT | 2C, 2F
CR2D_Inter (Driver-side side air bag sensor system internal circuit disabled) | OK/ FAULT | • Sensor normal: OK • Sensor internal malfunction: FAULT | 2C, 2F
CR2D_Mount (Driver-side side air bag sensor assembly incorrect) | OK/ FAULT | • Sensor normal: OK • Sensor Install malfunction: FAULT | 2C, 2F
CR2D_Short (Driver-side side air bag sensor system communication error) | OK/ FAULT | • Sensor normal: OK • Sensor open or short circuit: FAULT | 2C, 2F
CR2P_Comm (Passenger-side side air bag sensor system communication data error) | OK/ FAULT | • Sensor normal: OK • Sensor communication malfunction: FAULT | 2X, 2AA
CR2P_Inter (Passenger-side side air bag sensor system internal circuit disabled) | OK/ FAULT | • Sensor normal: OK • Sensor internal malfunction: FAULT | 2X, 2AA
CR2P_Mount (Passenger-side side air bag sensor assembly incorrect) | OK/ FAULT | • Sensor normal: OK • Sensor Install malfunction: FAULT | 2X, 2AA
CR2P_Short (Passenger-side side air bag sensor system communication error) | OK/ FAULT | • Sensor normal: OK • Sensor open or short circuit: FAULT | 2X, 2AA
IGN_V_2 (IG1 voltage) | V | Ignition switch is at ON: B+ | —
I_PAD_SW (PAD switch status) | On/ Off | • PAD switch is at PASS AIRBAG ON position: On • PAD switch is at PASS AIRBAG OFF position: Off | —
RES_AB_D (Driver-side air bag module resistance) | ohm | Under any condition: 1.5—4.7 ohms | 1A, 1D
RES_AB_P (Passenger-side air bag module resistance) | ohm | Under any condition: 1.3—4.7 ohms | 1S, 1V
RES_PT_D (Driver-side pre-tensioner seat belt resistance) | ohm | Under any condition: 1.3—4.7 ohms | 2A, 2D
RES_PT_P (Passenger-side pre-tensioner seat belt resistance) | ohm | Under any condition: 1.3—4.7 ohms | 2V, 2Y
RES_SAB_D (Driver-side side air bag module resistance) | ohm | Under any condition: 1.3—4.7 ohms | 2G, 2J
RES_SAB_P (Passenger-side side air bag module resistance) | ohm | Under any condition: 1.3—4.7 ohms | 2P, 2S