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Engine-Codes - Cadillac - B1148 CADILLAC

B1148 CADILLAC Code - Passenger Side Air Bag System Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What is this?
Table of contents
What does this mean?

|B1148 CADILLAC code possible causes

  • Faulty Passenger Side Air Bag
  • Passenger Side Air Bag harness is open or shorted
  • Passenger Side Air Bag circuit poor electrical connection
  • Faulty Side Impact Sensing Module (SISM)
  • Faulty Sensing and Diagnostic Module (SDM)

|How is the B1148 CADILLAC code repair?

Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|What is the cost to diagnose the B1148 CADILLAC code

Labor: 1.0

The cost to diagnose the B1148 CADILLAC code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|What are B1148 CADILLAC code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|What is B1148 CADILLAC code meaning?

When the ignition switch is turned to RUN position, Side Impact Sensing Module (SISM) will perform tests to diagnose critical internal malfunctions. The SISM then tests the deployment loop for an open, short to ground or ignition, high or low resistance, or reserve energy failure condition. SISM transmits a 300-millisecond, 50 percent duty cycle, pulse width modulated signal to Sensing and Diagnostic Module (SDM) over-circuit 2108 to indicate normal operation and no malfunctions. SISM communicates that it is turning off (ignition OFF) by sending a 20 millisecond, 50 percent duty cycle, pulse width modulated signal. The Diagnostic Trouble Code (DTC) sets when SDM receives a pulse width signal other than specified for normal operation, or no signal. SISM performs tests during POWER-ON, CONTINUOUS MONITORING, and asynchronously.

|Need more information with the B1148 CADILLAC code?

Need more information on how to fix the B1148 CADILLAC code?
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|Need help with a B1148 CADILLAC code?

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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service

  • Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
  • Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
  • Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
  • Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.

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