“AIR BAG” Warning Lamp Comes ON Steady
Wiring Diagram
1. From main fuse 6. “AIR BAG” warning lamp in combination meter 11. “AIR BAG” monitor coupler
2. Ignition switch 7. Connection detection pin 12. To ECM, TCM and ABS control module
(if equipped)
3. Circuit fuse box 8. Data link connector 13. Ground for air big system
4. “METER” fuse 9. To circuit fuse box 14. SDM
5. “AIR BAG” fuse 10. Ground on body    
Be sure to perform Air Bag Diagnostic System Check before starting diagnosis according to the flow.
When measurement of resistance or voltage is required in this flow, use a specified digital multimeter (Refer to Special Tool .) along with a correct terminal adapter from special tool (Connector test adapter kit).
When a check for proper connection is required, refer to Inspection of Intermittents and Poor Connections .
If there is open circuit in the air bag wire harness, connector or terminal is found damaged, replace the wire harness, connector and terminal as an assembly.
Flow Test Description
Step 1: Check for “AIR BAG” fuse blown.
Step 2: Check for power source circuit.
Step 3: Check for “AIR BAG” warning lamp circuit.
Step Action YES NO
1) Ignition switch OFF.
2) Remove and inspect “AIR BAG” fuse.
Is fuse good?
Go to Step 2.
“BLU/RED” wire short to ground.
After repair, replace “AIR BAG” fuse.
1) Disconnect SDM connector “G102”.
2) Check proper connection to SDM at terminal “G102-4”.
3) If OK, then check voltage between “G102-4” terminal of SDM connector and body ground with ignition switch ON.
Special Tool
(A) : 09932–76010
Is it 8 V or more?
Go to Step 3.
“BLU/RED” wire (between “AIR BAG” fuse and SDM connector) open “BLK/BLU” wire (between ignition switch and “AIR BAG” fuse) open or short to ground.
1) Disconnect 20-pin combination meter connector “G92” from combination meter referring to Combination Meter Removal and Installation .
2) Measure resistance between “G102-2” terminal of SDM connector and body ground.
Special Tool
(A) : 09932–76010
Is resistance 1 MΩ or more?
Substitute a known-good SDM and recheck.
“BLU” wire (between combination meter and SDM connector) short to ground.
Upon completion of inspection and repair work, perform the following items.
Reconnect all air bag system components, ensure all components are properly mounted.
Repeat Air Bag Diagnostic System Check to confirm that the trouble has been corrected.