DTC 53

DTC 53 Deployment Commanded With Deployment Loop Fault Or Energy Reserves Out Of Range




Circuit Description:
The Sensing and Diagnostic Module (SDM) contains a sensing drive which converts vehicle velocity changes to an electrical signal. The electrical signal generated is processed by the SDM and then compared to a value stored in memory. When the generated signal exceeds the stored value, the SDM will cause current to flow through the air bag assembly deploying the air bags. Diagnostic Trouble Code (DTC) 53 is set accompanying with DTC 51 when a deployment occurs while an air bag assembly circuit fault is present that could possible result in a no deployment situation in one or both air bag assemblies.

DTC Will Set When:
The SDM detects a frontal crash, up to 30 degrees off the centerline of the vehicle, of sufficient force to warrant deployment of the air bags and an inflator circuit fault is present.

Action Taken:
SDM turns "ON" the "AIR BAG" warning lamp records "Crash Data", and sets a diagnostic trouble code.

DTC Will Clear When:
The SDM is replaced. If DTC 53 is set, one or more DTCs will be set in addition to DTC 53. Malfunction(s) setting DTC(s) (other than DTC 71) must be repaired so that DTC(s) will not be set when a new SDM is installed.

DTC 53 (Steps 1 - 3):

DTC Chart Test Description:
Number(s) below refer to step number(s) on the diagnostic chart:

2. If air bag assembly has not deployed, Diagnostic Trouble Code (DTC) 53 may have falsely set.
3. If DTC 53 has set with no signs of frontal impact, the diagnostic trouble code has falsely set.

WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SENSING AND DIAGNOSTIC MODULE (SDM). NEVER STRIKE OR JAR THE SDM. NEVER POWER UP THE SRS WHEN THE SDM IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SDM AND MOUNTING BRACKET FASTENERS MUST BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTING TOWARD THE FRONT OF THE VEHICLE TO ENSURE PROPER OPERATION OF THE SRS. THE SDM COULD BE ACTIVATED WHEN POWERED WHILE NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN PERSONAL INJURY.