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 Testing and Inspection 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 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.