Circuit Description
Whent 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
passenger inflator module high circuit and passenger inflator module low circuit
voltage difference. By monitoring the voltage difference, the SDM is able to calculate
the passenger loop resistance. A low loop resistance indicates the two passenger
circuits are shorted together.
Conditions for Setting the DTC
DTC B0016 can be set when the passenger loop resistance is low. The following
conditions must be met to set this DTC.
• | Ignition voltage is present at the SDM and continuous. |
• | The passenger deployment loop resistance is under 1.3 ohms. |
• | Fault is present for half a second. |
Action Taken When the DTC Sets
• | The air bag telltale will be on. |
Diagnostic Aids
• | When attempting to diagnose an intermittent passenger loop fault, use
the scan tool to monitor current DTCs. |
| Wiggle the wires and check the connections while watching for a current DTC
to appear and/or disappear on the scan tool. |
• | Always start diagnosis of the SIR DTCs with an inspection of wiring and
components for visible damage. |
• | A malfunctioning shorting bar at the passenger inflator module harness
could cause this DTC. |
B0016