Deck Lid Ajar Siwtch Signal Circuit Low
Table of contents
B3895 GMC Possible Causes
- Faulty Deck Lid Ajar Siwtch
- Deck Lid Ajar Siwtch harness is open or shorted
- Deck Lid Ajar Siwtch circuit poor electrical connection
- Faulty Body Control Module (BCM)
How do I fix code B3895 GMC?
Check 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.
Cost of diagnosing the B3895 GMC code
The cost of diagnosing the B3895 GMC code is 1.0 hour of labor. The auto repair labor rates vary by location, your vehicle’s make and model, and even your engine type. Most auto repairs shops charge between $75 and $150 per hour.
Possible Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
B3895 GMC Description
Rear compartment occupant sensor is connected to battery voltage and ground at all times. When a combination of a difference in temperature compared to ambient and movement is detected by rear compartment occupant sensor and ignition is off, Body Control Module (BCM) will command horn to chirp and command deck lid to release within 3 minutes of a detect signal from rear compartment occupant sensor. If ignition is on when BCM receives detect signal, disable switch on rear compartment occupant sensor will flash.
Rear compartment occupant sensor can be disabled by pressing disable switch on rear compartment occupant sensor and holding for 2 seconds. BCM will command trunk ajar telltale on for one minute with each ignition on signal while rear compartment occupant sensor is disabled. Once deck lid is opened, rear compartment occupant sensor will reset to on and resume normal operation. Rear compartment occupant sensor can also be enabled inside of rear compartment with ignition on or off by pressing disable switch. Deck lid ajar switch signal circuit is used for rear compartment occupant sensor class 2 data.
The Diagnostic Trouble Code (DTC) sets when BCM detects short to ground in trunk ajar switch signal circuit for greater than 2 seconds.