ON-BOARD DIAGNOSTIC FUNCTION


BHE080201046T02

Self-Malfunction Diagnostic Function

• The self-diagnostic function determines that there is a malfunction, outputs a signal, as a DTC, to the DLC-2, and at the same time, flashes the air bag system warning light to advise the driver of a malfunction.

• The air bag system warning light illuminates or flashes to indicate a single DTC according to the present malfunction. (If there is more than one present malfunction, only one DTC will be displayed according to the preset priority ranking.)

• The air bag system warning light will flash the DTC pattern for five cycles, and then will remain illuminated until the ignition switch is turned to the LOCK position.

• The self-diagnostic function consists of a present malfunction diagnostic and a past malfunction diagnostic.

DTC table

DTC

System malfunction location

WDS display

Air bag system warning light

Flashing pattern

Priority ranking

B1231
13

3
SAS unit activation (deployment) control freeze
B1342
12

2
SAS unit
 
Continuously illuminated
1
SAS unit (DTC 12 detection circuit malfunction)
B1426
57

21
Seat belt warning light circuit short to power supply
B1427
Seat belt warning light circuit open
B1869
 
Continuously illuminated
1
Air bag system warning light circuit open
 
Does not illuminate
 
Air bag system warning light circuit short to body ground
B1870
 
Continuously illuminated
1
Air bag system warning light circuit short to power supply
B1877
33

13
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

12
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
B1884
18

20
Passenger air bag deactivation (PAD) indicator circuit open or short to body ground
B1885
33

13
Driver-side pre-tensioner seat belt circuit resistance low
B1886
34

12
Passenger-side pre-tensioner seat belt circuit resistance low
B1890
18

20
Passenger air bag deactivation (PAD) indicator circuit short to power supply
B1913
19

11
Driver-side air bag module (inflator No.1) circuit short to body ground
21

10
Passenger-side air bag module (inflator No.1) circuit short to body ground
B1916
19

11
Driver-side air bag module (inflator No.1) circuit short to power supply
B1921
14

4
Activation (deployment) inhibited due to configuration setting
B1925
21

10
Passenger-side air bag module (inflator No.1) circuit short to power supply
B1932
19

11
Driver-side air bag module (inflator No.1) circuit resistance high
B1933
21

10
Passenger-side air bag module (inflator No.1) circuit resistance high
B1934
19

11
Driver-side air bag module (inflator No.1) circuit resistance low
B1935
21

10
Passenger-side air bag module (inflator No.1) circuit resistance low
B1992
22

15
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

14
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
B2228
19

11
Driver-side air bag module (inflator No.2) circuit short to body ground
B2229
21

10
Passenger-side air bag module (inflator No.2) circuit short to body ground
B2230
19

11
Driver-side air bag module (inflator No.2) circuit short to power supply
B2231
21

10
Passenger-side air bag module (inflator No.2) circuit short to power supply
B2232
19

11
Driver-side air bag module (inflator No.2) circuit resistance high
B2233
21

10
Passenger-side air bag module (inflator No.2) circuit resistance high
B2234
19

11
Driver-side air bag module (inflator No.2) circuit resistance low
B2235
21

10
Passenger-side air bag module (inflator No.2) circuit resistance low
B2296
42

9
Crash zone sensor (communication error, internal circuit abnormal)
B2434
51

18
Driver-side front buckle switch circuit short to ground
B2435
Driver-side front buckle switch circuit resistance not within specification
B2438
52

19
Passenger-side front buckle switch circuit short to ground
B2439
Passenger-side front buckle switch circuit resistance not within specification
B2444
43

8
Driver-side side air bag sensor (internal circuit abnormal)
B2445
44

7
Passenger-side side air bag sensor (internal circuit abnormal)
B2477
54

5
Configuration error
B2691
51

18
Driver-side front buckle switch circuit open or short to power supply
B2692
52

19
Passenger-side front buckle switch circuit open or short to power supply
B2773
24

17
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

16
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
B2867
31

6
Poor connection of any SAS unit connectors
U2017
43

8
Driver-side side air bag sensor (communication error)
U2018
44

7
Passenger-side side air bag sensor (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 unit, can be freely selected and read out in real-time.

• The WDS or equivalent 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
 
D_ABAGR2
(Driver-side air bag module (inflator No.2) resistance)
Ohms
Under any condition: 1.5-3.7 ohms
1G, 1J
D_CRSH_S
(Driver-side side air bag sensor status)
OK/
COMM_FAIL/
INT_FAIL
• Sensor normal: OK
• Sensor communication error: COMM_FAIL
• Sensor internal circuit abnormal: INT_FAIL
2Z, 2AA
DABAGR
(Driver-side air bag module (inflator No.1) resistance)
Ohms
Under any condition: 1.5-3.7 ohms
1S, 1V
D_PTENSFLT
(Driver-side pre-tensioner seat belt circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Pre-tensioner seat belt circuit resistance low: SQ_LOWRES
2P, 2S
DR_BUKL
(Driver-side buckle switch status)
Buckled/
Unbuckled
• Driver-side buckle switch on: Buckled
• Driver-side buckle switch off: Unbuckled
2T
DR_CURTN
(Driver-side curtain air bag module resistance)
Ohms
Under any condition: 1.4-3.2 ohms
2V, 2Y
DR_PTENS
(Driver-side pre-tensioner seat belt resistance)
Ohms
Under any condition: 1.5-3.1 ohms
2P, 2S
DS_AB
(Driver-side side air bag module resistance)
Ohms
Under any condition: 1.4-3.2 ohms
2M, 2O
DS_AB_ST
(Driver-side side air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2M, 2O
DS_CURT_ST
(Driver-side curtain air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2V, 2Y
DS1_STAT
(Driver-side air bag module (inflator No.1) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1S, 1V
DS2_STAT
(Driver-side air bag module (inflator No.2) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1G, 1J
DSB_P_ST
(Driver-side pre-tensioner seat belt circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Pre-tensioner seat belt circuit resistance low: SQ_LOWRES
2P, 2S
FNT_CRSH_S
(Crash zone sensor status)
OK/
COMM_FAIL/
INT_FAIL
• Sensor normal: OK
• Sensor communication error: COMM_FAIL
• Sensor internal circuit abnormal: INT_FAIL
1B, 1C
OD_D_CRSH
(Driver-side side air bag sensor status)
OK/
COMM_FAIL/
INT_FAIL
• Sensor normal: OK
• Sensor communication error: COMM_FAIL
• Sensor internal circuit abnormal: INT_FAIL
2Z, 2AA
OD_D_CURT
(Driver-side curtain air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2V, 2Y
OD_DAB1_ST
(Driver-side air bag module (inflator No.1) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1S, 1V
OD_DAB2_ST
(Driver-side air bag module (inflator No.2) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1G, 1J
OD_DSAB_ST
(Driver-side side air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2M, 2O
OD_F_CRSH
(Crash zone sensor status)
OK/
COMM_FAIL/
INT_FAIL
• Sensor normal: OK
• Sensor communication error: COMM_FAIL
• Sensor internal circuit abnormal: INT_FAIL
1B, 1C
OD_P_CRSH
(Passenger-side side air bag sensor status)
OK/
COMM_FAIL/
INT_FAIL
• Sensor normal: OK
• Sensor communication error: COMM_FAIL
• Sensor internal circuit abnormal: INT_FAIL
2B, 2C
OD_P_CURT
(Passenger-side curtain air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2A, 2D
OD_PAB1_ST
(Passenger-side air bag module (inflator No.1) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1M, 1P
OD_PAB2_ST
(Passenger-side air bag module (inflator No.2) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1A, 1D
OD_PSAB_ST
(Passenger-side side air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2I, 2L
P_ABAGR2
(Passenger-side air bag module (inflator No.2) resistance)
Ohms
Under any condition: 1.4-2.9 ohms
1A, 1D
P_PTENSFLT
(Passenger-side pre-tensioner seat belt circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Pre-tensioner seat belt circuit resistance low: SQ_LOWRES
2G, 2J
PABAGR
(Passenger-side air bag module (inflator No.1) resistance)
Ohms
Under any condition: 1.4-2.9 ohms
1M, 1P
P_CRSH_S
(Passenger-side side air bag sensor status)
OK/
COMM_FAIL/
INT_FAIL
• Sensor normal: OK
• Sensor communication error: COMM_FAIL
• Sensor internal circuit abnormal: INT_FAIL
2B, 2C
PS_AB
(Passenger-side side air bag module resistance)
Ohms
Under any condition: 1.4-3.2 ohms
2I, 2L
PS_AB_ST
(Passenger-side side air bag sensor circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2I, 2L
PS_CURTN
(Passenger-side curtain air bag module resistance)
Ohms
Under any condition: 1.4-3.2 ohms
2A, 2B
PS_CURT_ST
(Passenger-side curtain air bag module circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
2A, 2D
PS_PTENS
(Passenger-side pre-tensioner seat belt resistance)
Ohms
Under any condition: 1.5-3.1 ohms
2G, 2J
PS1_STAT
(Passenger-side air bag module (inflator No.1) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1M, 1P
PS2_STAT
(Passenger-side air bag module (inflator No.2) circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Air bag module circuit resistance low: SQ_LOWRES
1A, 1D
PSB_P_ST
(Passenger-side pre-tensioner seat belt circuit status)
NORMAL/
OPEN/
SHRT_GND/
SHRT_B+/
SQ_LOWRES
• Related wiring harness normal: NORMAL
• Related wiring harness circuit open: OPEN
• Related wiring harness short to ground: SHRT_GND
• Related wiring harness short to power supply: SHRT_B+
• Pre-tensioner seat belt circuit resistance low: SQ_LOWRES
2G, 2J
RCM_VOLT
(IG1 voltage)
V
• Ignition switch is at ON: B+
• Other: 0
1W