Circuit Description
The instrument cluster (IPC) sends a message over class 2 serial data line to the inflatable restraint sensing and diagnostic module (SDM) if the IPC cannot turn the AIR BAG warning lamp ON or OFF.
Conditions for Setting the DTC
If the SDM receives a message from the IPC that the IPC cannot control the AIR BAG warning lamp. This test is run Asynchronously during Continuous Monitoring by the IPC.
Action Taken When the DTC Sets
The SDM sets a Diagnostic Trouble Code (DTC).
Conditions for Clearing the MIL/DTC
| • | Current DTC |
| - | The ignition switch is turned to OFF. |
| - | The SDM receives the IPC message response over class 2 serial data line. |
| • | History DTC |
| - | You issue a scan tool Clear DTCs command. |
| - | Once 250 malfunction free ignition cycles have occurred. |
Diagnostic Aids
It is unlikely that the SDM is malfunctioning if DTC B1161 is set. A malfunctioning IPC is the most likely cause of this DTC.
When measurements are requested in this table, use J 39200 Digital Multimeter with the correct terminal adapter from J 35616 Connector Test Adapter Kit. When a check for proper connection is requested, refer to General Electrical Diagnosis Procedures in Wiring Systems. When a wire, connector or terminal repair is requested, use J-38125 Terminal Repair Kit 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 • Point the arrow on the SDM toward the front of the vehicle • Tighten all of the SDM fasteners and SDM bracket fasteners to
the specified torque value
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | ||
2 |
Is DTC B1161 set? | -- |
