ON-BOARD DIAGNOSTIC


id080200001500


Outline

•  The air bag system has an on-board diagnostic function to facilitate the system diagnosis.
•  The on-board diagnostic function consists of the following functions:
―  A malfunction detection function, which detects overall malfunctions in the air bag system-related parts.
―  A memory function, which stores detected DTCs.
―  A display function, which indicates malfunction locations and status via DTC output.
―  A PID/data monitoring function, which reads out specific input/output signals and verifies the input/output condition.
•  Using the Mazda Modular Diagnostic System (M-MDS), DTCs can be read out and deleted, and the PID/data monitoring function can be activated.
•  The system has a fail-safe function to prevent the accidental activation of the air bags in case of an air bag system malfunction.

Function


Self-diagnostic function

Memory function
•  Stores malfunctions detected in the air bag system-related parts using the malfunction detection function, and the stored malfunction contents are not cleared even if the ignition is switched off or the negative battery cable is disconnected.
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 CAN.

X: Applicable
−: Not applicable

DTC

System malfunction location

Fail-safe function

Drive cycle

Self test type*1

Memory function

M-MDS display

Air bag system warning light

Flashing pattern

Priority ranking

B0001:11
19
17
Driver-side air bag module circuit short to body ground
C, D
×
B0001:12
Driver-side air bag module circuit short to power supply
C, D
×
B0001:13
Driver-side air bag module circuit open circuit or resistance high
C, D
×
B0001:19
Short circuit to driver-side air bag module and other air bag module circuits
C, D
×
B0001:1A
Driver-side air bag module circuit resistance low
C, D
×
B0001:55
Configuration setting error (driver-side air bag module structural malfunction)
C, D
×
B0003:53
Flashing
4
Operation (deployment) inhibited
C, D
×
B0010:11
21
16
Passenger-side air bag module circuit short to body ground
C, D
×
B0010:12
Passenger-side air bag module circuit short to power supply
C, D
×
B0010:13
Passenger-side air bag module circuit open circuit or resistance high
C, D
×
B0010:19
Short circuit to passenger-side air bag module and other air bag module circuits
C, D
×
B0010:1A
Passenger-side air bag module circuit resistance low
C, D
×
B0010:55
Configuration setting error (passenger-side air bag module structural malfunction)
C, D
×
B0094:11
42
9
Crash zone sensor circuit short to body ground
C, D
×
B0094:13
Crash zone sensor circuit open circuit or short to power supply
C, D
×
B0094:87
Signal reception error from crash zone sensor
C, D
×
B0094:96
Crash zone sensor internal malfunction
C, D
×
B0094:55
Configuration setting error (crash zone sensor structural malfunction)
C, D
×
B00D2:01
14
5
Air bag system warning light malfunction
C, D
×
B00D2:29
Invalid signal to air bag system warning light
C, D
×
B00D5:01
18
25
PAD OFF indicator circuit open circuit or short to power supply
C, D
×
B00D5:29
PAD indicator communication error
C, D
×
B1011:95
58
7
SAS control module connectors are poorly connected
C, D
×
B10FD:11
43
13
Driver-side side air bag sensor circuit short to body ground or power supply
C, D
×
B10FD:13
Driver-side side air bag sensor circuit open circuit or resistance high
C, D
×
B10FD:87
Signal reception error from driver-side side air bag sensor
C, D
×
B10FD:96
Driver-side side air bag sensor internal malfunction
C, D
×
B10FD:55
Configuration setting error (driver-side side air bag sensor structural malfunction)
C, D
×
B10FE:11
44
12
Passenger-side side air bag sensor circuit short to body ground or power supply
C, D
×
B10FE:13
Passenger-side side air bag sensor circuit open circuit or resistance high
C, D
×
B10FE:87
Signal reception error from passenger-side side air bag sensor
C, D
×
B10FE:96
Passenger-side side air bag sensor internal malfunction
C, D
×
B10FE:55
Configuration setting error (passenger-side side air bag sensor structural malfunction)
C, D
×
B1126:11
22
22
Driver-side side air bag module circuit short to body ground
C, D
×
B1126:12
Driver-side side air bag module circuit short to power supply
C, D
×
B1126:13
Driver-side side air bag module circuit open circuit or resistance high
C, D
×
B1126:19
Short circuit to driver-side side air bag module and other air bag module circuits
C, D
×
B1126:1A
Driver-side side air bag module circuit resistance low
C, D
×
B1126:55
Configuration setting error (driver-side side air bag module structural malfunction)
C, D
×
B1127:11
23
21
Passenger-side side air bag module circuit short to body ground
C, D
×
B1127:12
Passenger-side side air bag module circuit short to power supply
C, D
×
B1127:13
Passenger-side side air bag module circuit open circuit or resistance high
C, D
×
B1127:19
Short circuit to passenger-side side air bag module and other air bag module circuits
C, D
×
B1127:1A
Passenger-side side air bag module circuit resistance low
C, D
×
B1127:55
Configuration setting error (passenger-side side air bag module structural malfunction)
C, D
×
B1128:11
24
24
Driver-side curtain air bag module circuit short to body ground
C, D
×
B1128:12
Driver-side curtain air bag module circuit short to power supply
C, D
×
B1128:13
Driver-side curtain air bag module circuit open circuit or resistance high
C, D
×
B1128:19
Short circuit to driver-side curtain air bag module and other air bag module circuits
C, D
×
B1128:1A
Driver-side curtain air bag module circuit resistance low
C, D
×
B1128:55
Configuration setting error (driver-side curtain air bag module structural malfunction)
C, D
×
B1129:11
25
23
Passenger-side curtain air bag module circuit short to body ground
C, D
×
B1129:12
Passenger-side curtain air bag module circuit short to power supply
C, D
×
B1129:13
Passenger-side curtain air bag module circuit open circuit or resistance high
C, D
×
B1129:19
Short circuit to passenger-side curtain air bag module and other air bag module circuits
C, D
×
B1129:1A
Passenger-side curtain air bag module circuit resistance low
C, D
×
B1129:55
Configuration setting error (passenger-side curtain air bag module structural malfunction)
C, D
×
B1193:00
13
3
SAS control module operation (deployment)
C, D
×
[B1196:13]
45
15
Driver-side side air bag sensor No.2 circuit open circuit or short to power supply
C, D
×
[B1196:87]
Signal reception error from driver-side side air bag sensor No.2
C, D
×
[B1196:96]
Driver-side side air bag sensor No.2 internal malfunction
C, D
×
[B1196:55]
Configuration setting error (driver-side side air bag sensor No.2 structural malfunction)
C, D
×
[B1197:11]
46
14
Passenger-side side air bag sensor No.2 circuit short to body ground
C, D
×
[B1197:13]
Passenger-side side air bag sensor No.2 circuit open circuit or short to power supply
C, D
×
[B1197:87]
Signal reception error from passenger-side side air bag sensor No.2
C, D
×
[B1197:96]
Passenger-side side air bag sensor No.2 internal malfunction
C, D
×
[B1197:55]
Configuration setting error (passenger-side side air bag sensor No.2 structural malfunction)
C, D
×
B1202:01
18
25
PAD ON indicator circuit open circuit or short to power supply
C, D
×
B1206:00
SAS control module operation (deployment) (fuel cut signal output)
C, D
×
B1211:11
38
20
Driver-side pre-tensioner seat belt circuit short to body ground
C, D
×
B1211:12
Driver-side pre-tensioner seat belt circuit short to power supply
C, D
×
B1211:13
Driver-side pre-tensioner seat belt circuit open circuit or resistance high
C, D
×
B1211:19
Short circuit to driver-side pre-tensioner seat belt and other air bag module circuits
C, D
×
B1211:1A
Driver-side pre-tensioner seat belt circuit resistance low
C, D
×
B1211:55
Configuration setting error (driver-side pre-tensioner seat belt structural malfunction)
C, D
×
B1214:11
39
19
Passenger-side pre-tensioner seat belt circuit short to body ground
C, D
×
B1214:12
Passenger-side pre-tensioner seat belt circuit short to power supply
C, D
×
B1214:13
Passenger-side pre-tensioner seat belt circuit open circuit or resistance high
C, D
×
B1214:19
Short circuit to passenger-side pre-tensioner seat belt and other air bag module circuits
C, D
×
B1214:1A
Passenger-side pre-tensioner seat belt circuit resistance low
C, D
×
B1214:55
Configuration setting error (passenger-side pre-tensioner seat belt structural malfunction)
C, D
×
[B1226:55]
36
11
Configuration setting error (driver-side pressure sensor structural malfunction)
C, D
×
[B1227:55]
37
10
Configuration setting error (passenger-side pressure sensor structural malfunction)
C, D
×
[B1228:11]
35
18
Lap pre-tensioner seat belt circuit short to body ground
C, D
×
[B1228:12]
Lap pre-tensioner seat belt circuit short to power supply
C, D
×
[B1228:13]
Lap pre-tensioner seat belt circuit open circuit or resistance high
C, D
×
[B1228:19]
Short circuit to lap pre-tensioner seat belt and other air bag module circuits
C, D
×
[B1228:1A]
Lap pre-tensioner seat belt circuit resistance low
C, D
×
[B1228:55]
Configuration setting error (lap pre-tensioner seat belt structural malfunction)
C, D
×
[B1417:11]
41
8
Passenger-side crash zone sensor circuit short to body ground
C, D
×
[B1417:13]
Passenger-side crash zone sensor circuit open circuit or short to power supply
C, D
×
[B1417:87]
Signal reception error from passenger-side crash zone sensor
C, D
×
[B1417:96]
Passenger-side crash zone sensor internal malfunction
C, D
×
[B1417:55]
Configuration setting error (passenger-side crash zone sensor structural malfunction)
C, D
×
B143A:00
SAS control module operation (collision detection) signal output
C, D
×
B1D75:55
56
26
Configuration setting error (PAD switch structural malfunction)
C, D
×
B1D75:62
PAD switch circuit open circuit or short to body ground
C, D
×
C0061:29
Low-G sensor (lateral-G) in SAS control module (internal circuit disabled)
C, D
×
C0062:29
Low-G sensor (forward-G) in SAS control module (internal circuit disabled)
C, D
×
C0063:29
Yaw rate sensor in SAS control module (internal circuit disabled)
C, D
×
P0666:29
Temperature sensor in SAS control module (internal circuit disabled)
C, D
×
U0001:88
14
5
Module communication error (HS-CAN)
C, D
×
U0155:00
14
5
Communication error with instrument cluster
C, D
×
U0300:00
54
6
Configuration setting invalid
C, D
×
U2005:68
14
5
PCM communication error (vehicle speed signal)
C, D
×
U2100:00
Flashing
4
Configuration not set
C, D
×
U2107:00
SAS control module operation (deployment) signal output
C, D
×
U3000:49
12
2
SAS control module internal malfunction
C, D
×
U3003:16
Continuously illuminated
1
SAS control module power supply voltage decreases (less than 8 V)
C, D
×
U3003:17
SAS control module power supply voltage increases (18 V or more)
C, D
×

*1  :C: CMDTC self test, D: ODDTC self test
[ ]  :DTCs do not usually display because the related function is not equipped.
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 stored data using the scanning tool when necessary. The DTCs are indicated using seven digits. Each digit indicates the following.
ac5uun00001092
Status byte for DTC
•  The two digits (after hyphen) after the 7-digit DTC.
ac5wzn00001331
•  A code which indicates the pending code, current/past malfunction status, or warning illumination status.
•  Can be read by performing a CMDTC self-test using the Mazda Modular Diagnostic System (M-MDS).
•  For details on the status byte, refer to the explanation on the Mazda Modular Diagnostic System (M-MDS) when reading the DTC.


Snapshot data

Note
•  The SAS control module stores the following two types of information when a DTC is detected and displays snap shot data in the Mazda Modular Diagnostic System (M-MDS).
―  Vehicle information detected by SAS control module
―  Vehicle information detected by instrument cluster and received by SAS control module via CAN signal
•  The data for all DTCs currently detected is stored.

Snapshot data item

Unit

Definition

Data read/use method

Corresponding PID data monitor item

AAT
°C
°F
Ambient temperature
APP_STATUS
Accelerator Pedal Off/
Under20%/
Over20%/
FAIL
Accelerator pedal position status
CFG_STATUS
Config Complete/
Not Configured/
Config Error
Instrument cluster configuration status
ECT_STATUS
Under 0 degrees C/
0-Under 80 degrees C/
Over 80 degrees C/
FAIL
Engine coolant temperature status
FAULT_CNT
Number of malfunction detections
FIRST_DET_IG
hh:mm:ss*1
Time when initial malfunction occurs (IG-ON counter)
•  Elapsed time from when ignition is switched ON (engine off or on) until SAS control module detects first malfunction*3
IC_VPWR
V
Instrument cluster power supply voltage
•  The SAS control module constantly receives the power supply voltage value of the instrument cluster sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the SAS control module records the power supply voltage of the instrument cluster when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).
VPWR*2
IG-ON_TIMER
hh:mm:ss*1
Elapsed time since ignition was switched ON (engine off or on)
Note
•  The instrument cluster records the elapsed time since the ignition was switched ON (engine off or on).
•  The SAS control module constantly receives the elapsed time since the ignition was switched ON (engine off or on) sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the SAS control module records the elapsed time since the ignition was switched ON (engine off or on) when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).
LAST_CLR
hh:mm:ss*1
Repair time for last malfunction (B+ counter)
•  Elapsed time from when battery is connected until SAS control module detects that last malfunction is repaired*3
LAST_CLR_IG
hh:mm:ss*1
Repair time for last malfunction (IG-ON counter)
•  Elapsed time from when ignition is switched ON (engine off or on) until SAS control module detects that last malfunction is repaired*3
LAST_DET
hh:mm:ss*1
Time when last malfunction occurs (B+ counter)
•  Elapsed time from when battery is connected until SAS control module detects last malfunction*3
LAST_DET_IG
hh:mm:ss*1
Time when last malfunction occurs (IG-ON counter)
•  Elapsed time from when ignition is switched ON (engine off or on) until SAS control module detects last malfunction*3
PWR_MODE_KEY
Key Out/
Key Recently Out (Position 0)/
Accessory (Position 1)/
Post Ignition (Position 2)/
Ignition On (Position 2)/
Running (Position 2)/
Running - Starting
•  Key Out: Ignition switched off
•  Key Recently Out (Position 0): Elapsed time within 3 s since ignition was switched off
•  Accessory (Position 1): Ignition is switched to ACC
•  Post Ignition (Position 2): Elapsed time within 3 s since ignition was switched ON (engine off or on)
•  Ignition On (Position 2): Ignition switched ON (engine off)
•  Running (Position 2): Ignition switched ON (engine on)
•  Running - Starting: Cranking condition
•  The SAS control module constantly receives the ignition switch status sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the SAS control module records the ignition switch status when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).
RPM_STATUS
Engine Stop/
Under1500rpm/
Over1500rpm/
FAIL
Engine speed status
•  The SAS control module constantly receives the engine speed sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the SAS control module records the engine speed when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).
TACHOMTR*2
SHIFT_STATUS
P/N/
D/
R/
FAIL
Selector lever position status
•  The SAS control module constantly receives the selector lever position sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the SAS control module records the selector lever position when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).
TOTAL_DIST
km
miles
Accumulated total traveled distance from completion of vehicle until SAS control module detects DTC (Odometer value in instrument cluster)
The total traveled distance from which the SAS control module detects DTCs to the present can be calculated by performing the following procedure.
1.  Verify the odometer value in the instrument cluster.
2.  Verify the snapshot data item TOTAL_DIST.
3.  Subtract 2 from 1.
TOTAL_TIME
hh:mm:ss*1
Accumulated total elapsed time since vehicle completion until SAS control module detects a DTC*3
Note
•  When the ROOM fuse is removed, and the ignition is switched off, the time is not included in the elapsed time.
The elapsed time from which the SAS control module detects DTCs to the present can be calculated by performing the following procedure.
1.  Verify the instrument cluster PID item TOTAL_TIME.
2.  Verify the snapshot data item TOTAL_TIME.
3.  Subtract 2 from 1.
TOTAL_TIME*2
VPWR
V
SAS control module power supply malfunction
VPWR_IGA
VSPD_STATUS
Stop/
0-10km/h/
Over10km/h/
FAIL
Vehicle speed status
•  The SAS control module constantly receives the vehicle speed sent via CAN signal from the instrument cluster.
•  If a DTC is detected, the SAS control module records the vehicle speed when the DTC was detected, and it is displayed in the Mazda Modular Diagnostic System (M-MDS).
SPEEDOMTR*2

*1  :The seconds may be indicated after the decimal point.
*2  :Instrument cluster PID (See ON-BOARD DIAGNOSTIC [INSTRUMENT CLUSTER].)
*3  :The snap shot data of the number of stored malfunction detections, B+ counters, or IG ON counters is combined with the DTC detection conditions of the SAS control module, and the point-in-time data in the following table is stored.
am3uun00003524

SAS control module DTC detection period

Snapshot data

FAULT_CNT

(Number of malfunction detections)

TOTAL_TIME

FIRST_DET_IG

LAST_DET

LAST_DET_IG

LAST_CLR

LAST_CLR_IG

Number of malfunction detections

Time when first malfunction occurs (B+ counter)

Time when initial malfunction occurs (IG-ON counter)

Time when last malfunction occurs (B+ counter)

Time when last malfunction occurs (IG-ON counter)

Repair time for last malfunction (B+ counter)

Repair time for last malfunction (IG-ON counter)

(1)
1
A
G
A
G
-
-
(2)
1
A
G
A
G
B
H
(3)
2
A
G
C
I
B
H
(4)
2
A
G
C
I
D
J
(5)
3
A
G
E
K
D
J
(6)
3
A
G
E
K
F
L


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

Unit/Condition

Data contents

SAS control module terminal (Type A)

SAS control module terminal (Type B)

AB_WL
(Air bag system warning light status)
Lamp_Off/Lamp_On/Plant_Mode/Unknown
•  Air bag system warning light off: Lamp_Off
•  Air bag system warning light on: Lamp_On
•  Air bag system warning light status: Plant_Mode
•  Air bag system warning light status: Unknown
3K, 3L
3B, 3C
B_SW_P_FLT
(Passenger-side buckle switch malfunction status)
O.K./FAULT
•  Passenger-side buckle switch is normal: O.K.
•  Passenger-side buckle switch is abnormal: FAULT
2R
2T
P_SEAT_M_S
(Occupancy sensor)
Off/On
•  Not occupant seated in passenger-side front seat: Off
•  Occupant seated in passenger-side front seat: On
2I
2M
PAD_SW
(PAD switch status)
Off/On
•  PAD switch off: Off
•  PAD switch on: On
3Q, 3R
3N, 3K
PAD_SW_FLT
(PAD switch malfunction status)
O.K./FAULT
•  PAD switch is normal: O.K.
•  PAD switch is abnormal: FAULT
3Q, 3R
3N, 3K
RES_C_AB_D
(Driver-side curtain air bag module resistance nominal)
ohm
Continuous: 0.81–6.42 ohms
1S, 1V
1C, 1G
RES_C_AB_P
(Passenger-side curtain air bag module resistance nominal)
ohm
Continuous: 0.81–6.42 ohms
1W, 1T
1K, 1N
RES_F_AB1_D
(Driver-side air bag module (inflatorNo.1) resistance nominal)
ohm
Continuous: 0.99–6.42 ohms
3A, 3D
3J, 3H
RES_F_AB1_P
(Passenger-side air bag module (inflatorNo.1) resistance nominal)
ohm
Continuous: 0.81–6.42 ohms
3G, 3J
3L, 3M
RES_PCD_BAR
(Poorly connected detector bar terminals resistance nominal (all of SAS control module connectors))
ohm
•  Normal connected: 100 ohm or less
•  Poor connected: 20 kilohm or more
1a, 1b, 2a, 2b, 3a, 3b
RES_S_AB_D
(Driver-side side air bag module resistance nominal)
ohm
Continuous: 0.81–9.85 ohms
1A, 1D
1B, 1D
RES_S_AB_P
(Passenger-side side air bag module resistance nominal)
ohm
Continuous: 0.81–9.85 ohms
1J, 1G
1F, 1H
RES_SB_LP_D
(Driver-side lap pre-tensioner seat belt resistance nominal)
Note
•  Displays in the M-MDS but it does not operate.
RES_SB_P_D
(Driver-side pre-tensioner seat belt resistance nominal)
ohm
Continuous: 0.81–6.42 ohms
2D, 2A
2AB, 2Z
RES_SB_P_P
(Passenger-side pre-tensioner seat belt resistance nominal)
ohm
Continuous: 0.81–6.42 ohms
2G, 2J
2O, 2Q
SEAT_B_D
(Driver-side buckle switch status)
Unbuckled/Buckled
•  Driver-side front seat belt fastened (Driver-side buckle switch off): Buckled
•  Driver-side front seat belt not fastened (Driver-side buckle switch on): Unbuckled
2U
2N
SEAT_B_P
(Passenger-side buckle switch status)
Unbuckled/Buckled
Occupant seated in passenger-side front seat: On
•  Passenger-side front seat belt fastened (Passenger-side buckle switch off): Buckled
•  Passenger-side front seat belt not fastened (Passenger-side buckle switch on): Unbuckled
2R
2T
VPWR_IGA
(SAS control module power voltage)
V
Ignition is switched ON: IG1 voltage
3C
3AD