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B0022

DTC B0022 - Diagnostic Chart:






CIRCUIT DESCRIPTION

Schematic:






When the ignition switch is turned On and during vehicle operation, the SDM performs tests to detect system faults. One test the SDM performs is to monitor the driver deployment loop high circuit and driver deployment loop low circuit voltage difference. By monitoring voltage difference, the SDM is able to calculate the driver loop resistance. A low loop resistance indicates the two driver circuits are shorted together.

DTC PARAMETERS:
DTC B0022 can be set when the driver loop resistance is low. The following conditions must be met to set this DTC:
^ Ignition voltage is present at the SDM and continuous.
^ The driver deployment loop resistance is under 1.3 Ohms.
^ Fault is present for half a second.

ACTION TAKEN:
^ DTC B0022 will be set.
^ The air bag telltale will be On.

DIAGNOSTIC AIDS:
^ When attempting to diagnose an intermittent driver loop fault, use the Scan tool to monitor current DTCs. Wiggle wires, turn steering wheel, and check connections while watching for a current DTC to appear and/or disappear on Scan tool.
^ Always start diagnosis of SIR DTCs with an inspection of wiring and components for visible damage.
^ A malfunctioning shorting bar at the driver inflator module or lower steering column connector could cause this DTC.
^ Always perform the "SIR Diagnostic System Check" procedure before using this chart. Diagnostic System Check