AIR BAG SYSTEM - TROUBLESHOOTING GUIDE
T-138flowchartTROUBLESHOOTING GUIDE
Troubleshooting Procedure
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 indication will dominate until corrected.
Work flow
Air bag system troubleshooting work flow
1
Check in
2
Turn ignition switch ON from OFF
Check air bag system warning lamp operation
Warning lamp does not come on
Warning lamp does not come on
Check following possible causes:
- Fuses burned out
- Warning lamp burned out
- Disconnected diagnostic module
- Open circuit between warning lamp and diagnostic module
Repair as specified or replace failed part by recommended procedure
Turn ignition switch ON from OFF
Check air bag system warning lamp operation
Warning lamp flashes or remains on
Warning lamp flashes or remains on
Check system by referring to flash code table (See below)
Repair as specified or replace failed part by recommended procedure
Turn ignition switch ON from OFF
Check air bag system warning lamp operation
3
Warning lamp comes on, then goes off approx. 6 sec. from ignition switch turned ON
4
Check if horn sound
If horn does not sound, remove air bag module and reconnect module connectors
Check out
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.
Flash code table
Flash code table
1
Flash codeRemains ON
Possible causeFaulty diagnostic module or poor connection of diagnostic module connector
Flowchart No.1 (See page T-139)
2
Flash codeFlashes three times
Possible causeOpen circuit or poor connection of power source circuit
Flowchart No.2 (See page T-140)
3
Flash codeFlashes five times
Possible causeFaulty D-sensor (D-sensor remains ON)
Flowchart No.3 (See page T-142)
4
Flash codeFlashes ten times
Possible causeFaulty diagnostic module (System-down fuse burned)
Flowchart No.4 (See page T-143)
5
Flash codeFlashes four times
Possible causeFaulty S-sensor
Flowchart No.5 (See page T-144)
6
Flash codeFlashes six times
Possible causeFaulty air bag module or poor connection of clock spring connector
Flowchart No.6 (See page T-146)
7
Flash codeFlashes eight times
Possible causePoor ground of D-sensor
Flowchart No.7 (See page T-148)
8
Flash codeFlashes nine times
Possible causeOpen circuit between diagnostic module and D-sensor
Flowchart No.3 (See page T-142)
9
Flash codeFlashes two times
Possible causePoor ground of all D-sensors
Flowchart No.7 (See page T-148)