The inflatable restraint sensing and diagnostic module (SDM) contains sensing devices that converts vehicle velocity changes to electrical signals. The SDM processes the generated electrical signals and compares them to values stored in memory. When the generated signals exceed the stored values, the SDM performs additional signal processing and compares the generated signals to signals stored in memory. When 2 of the generated signals exceed the stored values, the SDM will cause current to flow through the inflator modules, deploying the inflator modules. DTC B0053 will set along with DTC B0051 when a deployment occurs while a circuit malfunction is present in any one of the deployment loops.
This diagnostic procedure supports the following DTC:
DTC B0053 Deployment Commanded with Loop DTCs Present
Ignition 1 voltage is within the normal operating voltage range.
The DTC will set if one of the following conditions occur:
• | The SDM detects a frontal crash of sufficient force to warrant deployment of the frontal inflator modules. |
• | The SDM detects a side impact crash of sufficient force to warrant deployment of a side inflator module. |
• | The SDM commands the AIR BAG indicator ON via class 2 serial data. |
• | The SDM records crash data. |
DTC B0053 is a latched code. You cannot clear a latched code. Replace the SDM after following the instructions in the diagnostic table.
DTC B0053 will be accompanied by another DTC, other than DTC B1000 and DTC B0051. Repair the malfunction causing the other DTCs before installing a new SDM.
Step | Action | Yes | No |
---|---|---|---|
Schematic Reference: SIR Schematics | |||
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | |
2 |
Does the vehicle show any signs of inflator module deployment? | Go to Step 5 | Go to Step 3 |
3 | Inspect the front of the vehicle and undercarriage for signs of impact/collision. Does the vehicle show any signs of impact/collision? | Go to Step 5 | Go to Step 4 |
4 | Replace the inflatable restraint sensing and diagnostic module (SDM). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 6 | -- |
5 |
Did you complete the action? | Go to Step 6 | -- |
6 |
Does the DTC reset? | Go to Step 2 | System OK |