Operation CHARM: Car repair manuals for everyone.

B0024

When measurements are requested in the diagnostic charts, use SA91114NE digital multimeter with correct terminal adapter from SA9206Z. When a check for proper connection is requested, refer to "Intermittents and Poor Connections". When a wire connector or terminal repair is requested, use the proper repair parts and refer to "Wiring Repair".

CAUTION: BE CAREFUL WHEN YOU HANDLE A SENSING AND DIAGNOSTIC MODULE (SDM). DO NOT STRIKE OR JOLT THE SDM. BEFORE APPLYING POWER TO THE SDM:
^ REMOVE ANY DIRT GREASE, ETC. FROM THE MOUNTING SURFACE.
^ POSITION THE SDM HORIZONTALLY ON THE MOUNTING SURFACE.
^ TIGHTEN ALL OF THE SDM FASTENERS AND SDM BRACKET FASTENERS TO THE SPECIFIED TORQUE VALUE.
FAILURE TO FOLLOW THE CORRECT PROCEDURES COULD CAUSE AIR BAG DEPLOYMENT, PERSONAL INJURY, OR UNNECESSARY SIR SYSTEM REPAIRS.


DTC B0024 - Diagnostic Chart (Part 1 Of 2):





DTC B0024 - Diagnostic Chart (Part 2 Of 2):






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, the SDM is able to detect when loop voltage is not between 2.4 and 6.0 Volts.

DTC PARAMETERS:
DTC B0024 can be set when the driver loop voltage is out of range. The following conditions must be met to set this DTC.
^ Ignition voltage is present at the SDM and continuous.
^ The driver loop voltage is over 6 Volts or under 2.4 Volts and loop resistance is under 6 Ohms.
^ Fault is present for half a second.

ACTION TAKEN:
^ DTC B0024 will 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 short to ground in circuits 347 or 348 could cause this DTC.
^ A short between circuits 347 or 348 and another vehicle circuit could cause this DTC.
^ Always perform the "SIR Diagnostic System Check" procedure before using this chart. Diagnostic System Check