Suzuki XL7 2007 Service Manual page 2046

8B-34 Air Bag System:
Reference Information
Schematic Reference
"SIR Schematics"
Connector End View Reference
"SIR Connector End Views"
Description and Operation
"SIR System Description and Operation"
Electrical Information Reference
• "Circuit Testing: "
• "Connector Repairs: "
• "Testing for Intermittent Conditions and Poor
Connections: "
• "Wiring Repairs: "
DTC B0073
Diagnostic Instructions
• Perform the "Diagnostic System Check - Vehicle Diagnostic Information: " prior to using this diagnostic procedure.
• Review "Strategy Based Diagnosis: " for an overview of the diagnostic approach.
• "Diagnostic Procedure Instructions - Vehicle Diagnostic Information: " provides an overview of each diagnostic
category.
DTC Descriptors
DTC B0073 01: RF Seat Belt Sensor Circuit Short to Battery
DTC B0073 02: RF Seat Belt Sensor Circuit Short to Ground
DTC B0073 04: RF Seat Belt Sensor Circuit Open Circuit
DTC B0073 06: Right Front Seat Belt Sensor Circuit Short To Ground or Open Circuit
Diagnostic Fault Information
Circuit
Low Reference
Right Front Seat Belt Switch Signal
Circuit/System Description
The inflatable restraint seat belt buckle sensor is within
the seat belt buckle and provides an input to the
inflatable restraint sensing and diagnostic module
(SDM). The SDM supplies a low reference circuit and a
seat belt switch signal circuit to determine a buckled or
unbuckled condition. The SDM monitors the seat belt
switch circuits, and if a fault is detected a DTC will be
set.
Conditions for Running the DTC
Ignition voltage is between 9-16 volts.
Scan Tool Reference
• "Scan Tool Data List - SIR"
• "Scan Tool Data Definitions - SIR"
Circuit/System Verification
1. Verify DTC B0052, B0053, or B0055 is not set.
➢ If DTC is set, refer to the "Diagnostic Trouble Code
(DTC) List - Vehicle Diagnostic Information: ".
2. With a scan tool, clear DTCs. Verify DTC B0085 is
not set.
➢ If DTC is set, replace the SDM.
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle
Diagnostic Information: " after completing the diagnostic
procedure.
"SIR/SRS Wiring Repairs"
Short to Open/High
Ground Resistance
— B0073 04, 06
B0073 02, 06 B0073 04, 06
Conditions for Setting the DTC
B0073 01
The SDM detects the seat switch signal circuit or low
reference circuit is shorted to voltage for 500
milliseconds.
B0073 02
The SDM detects the seat switch signal circuit or low
reference circuit is shorted to ground for 500
milliseconds.
B0073 04
The SDM detects the seat switch signal circuit or low
reference circuit is open for 500 milliseconds.
B0073 06
The SDM detects the seat switch signal circuit or low
reference circuit is shorted to ground or an open for 500
milliseconds.
Signal
Short to Voltage
Performance
—
B0073 01
—
—