DTC 54

CIRCUIT DESCRIPTION
The passenger deployment loop consists of the passenger inflator module, center sensor assembly and associated wires. The center sensor assembly injects a small amount of current through the passenger deployment loop through the P+ CKT output, terminal "B2". By monitoring the voltage at the P- CKT input, terminal "B1", the center sensor assembly calculates the combined resistance of the passenger inflator module and its associated wiring.

FAILURE CONDITIONS
DTC 54 will set if the center sensor assembly detects an open in the passenger deployment loop.

ACTION TAKEN:
The center sensor assembly will illuminate the "AIR BAG" indicator and open the safety circuit, disabling the SRS.

TEST DESCRIPTION:
Number(s) below refer to circled number (s) on the diagnostic chart.
1. This test determines whether the fault is in the passenger inflator module or in the SRS circuitry.
2. This test checks for an open in the P+ CKT.
3. This test determines whether the fault is due to an open in the P- CKT or a faulty center sensor assembly.