Mazda MX-5 1990 Workshop Manual page 720

T
TROUBLESHOOTING GUIDE
Troubleshooting Procedure
AIR BAG SYSTEM
Troubleshooting of the air bag system is performed using the coded flashing of the air bag system warning
lamp. The number of times the the warning lamp flashes is based on the type of fault being detected. Codes
are prioritized in such a way that if two or more faults occur at the same time, the highest priority fault indica-
tion will dominate until corrected.
Work flow
Check in
Turn ignition switch ON from OFF
Check air bag system warning
lamp operation
I
I
Warning lamp comes on, then
goes off approx. 6 sec. from igni- Warning lamp does not come on Warning lamp flashes or remains on
tion switch turned ON
I
I
Check following possible causes:
Check if horn sound
• Fuses burned out
If horn does not sound, remove air
• Warning lamp burned out
Check system by referring to flash
bag module and reconnect module
• Disconnected diagnostic module
code table (See below)
connectors • Open circuit between warning
lamp and diagnostic module
!
I
t
Repair as specified or replace
Check out
failed part by recommended
procedure
Note
• When the ignition switch is turned ON, an audible alarm may be heard. If so, it indicates a
simultaneous warning lamp failure and a problem in the air bag system.
050UTX-365
Flash code table
Priority Flash code Possible cause Flowchart No.
1 Remains ON Faulty diagnostic module or poor connec- 1
tion of diagnostic module connector (See page T -139)
2 Flashes three times Open circuit or poor connection of power
2
source circuit (See page T -140)
3
Flashes five times Faulty D-sensor (D-sensor remains ON)
3
(See page T -142)
4 Flashes ten times Faulty diagnostic module
4
(System-down fuse burned)
(See page T -143)
5 Flashes four times Faulty S-sensor
5
(See page T -144)
6 Flashes six times Faulty air bag module or poor connection 6
of clock spring connector (See page T -146)
7 Flashes eight times Poor ground of D-sensor 7
(See page T -148)
8
Flashes nine times Open circuit between diagnostic module 3
and D-sensor
(See page T
-142)
9 Flashes two times Poor ground of all D-sensors 7
(See page T -148)
05UOTX-366
T-138