Advanced Air Bag

SDM Power Supply and Ground Circuit Check

Wiring Diagram










Troubleshooting



1. Battery voltage check

Measure voltage on battery.

Is voltage in 9 - 16 V?
YES
Go to Step 2.
NO
Check charging system and repair as necessary referring to Generator Test.

2. Connection check

Check for loose each connection.

Is it connected securely?
YES
Go to Step 3.
NO
Intermittent trouble. Check for intermittent trouble referring to Inspection of Intermittent and Poor Connections:Advanced Air Bag
If OK, substitute a known-good SDM and recheck.

3. Circuit fuse check

With ignition switch turned OFF, check "A/B" fuse for blowing.

Is "A/B" fuse in good condition?
YES
Go to Step 4.
NO
Repair defective wire circuit. After repaired, replace "A/B" fuse.

4. Power supply circuit check

With ignition switch turned OFF, disconnect connector from SDM.
Check for proper connection to SDM terminal at "L04-27".
With ignition switch turned ON, measure voltage between "L04-27" terminal of SDM connector and body ground.
Special Tool

(A): 09932-76010





Is voltage in 10 - 14 V?
YES
Go to Step 5.
NO
Repair defective wire circuit.

5. Ground circuit check

Turn ignition switch to OFF position.
Check for proper connection to SDM terminal at "L04-28".
Measure resistance between "L04-28" terminal and vehicle body ground.
Special Tool

(A): 09932-76010





Is resistance 1 ohms or less?
YES
SDM Power Supply and ground circuit is good condition.
NO
Repair defective wire circuit.