Engine-Codes
 
OBDII Code List
 
B1040 INFINITI

B1040 INFINITI - Crash Zone Sensor

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3  What does this mean?

B1040 INFINITI Possible Causes

  • Faulty Crash Zone Sensor
  • Crash Zone Sensor harness is open or shorted
  • Crash Zone Sensor circuit poor electrical connection
  • Faulty Air Bag Diagnosis Sensor Unit

Cost of diagnosing the B1040 INFINITI code

    Labor: 1.0

    The cost of diagnosing the B1040 INFINITI code is 1.0 hour of labor. The auto repair labor rates vary widely across the country, and even within the same city. Most auto repairs shops charge between $75 and $150 per hour.

B1040 INFINITI Possible Symptoms

  • Air Bag Warning Light ON

B1040 INFINITI Meaning

The Crash Zone Sensor is the main “G” sensor that generates a signal voltage when it detects deceleration beyond the specified level caused by a frontal vehicle collision.

When the Air Bag Diagnosis Sensor Unit (ACU) defines both signal voltage of the “G” sensor and the safing sensor to be that of a collision which exceeds a specified level, the driving circuit switches on and feeds the electric ignitor of both driver and passenger air bags and pre-tensioner seat belt.

The Crash Zone Sensor has an integrated type of the “G” sensor element for frontal collision with output terminals for signal voltage.

OBDII Code B1040 INFINITI - Crash Zone Sensor - Engine-Codes.com

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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