What Does B1487 Mean?
This code indicates the Body Control Module (BCM) has detected an electrical fault in the right front door handle circuit. This typically involves the exterior door handle mechanism, which may include a switch, sensor, or keyless entry touch pad depending on vehicle configuration. The BCM has identified an open circuit, short circuit, high resistance, or loss of communication with the door handle assembly.
Common Causes
35%
Damaged or corroded wiring harness between BCM and door handle assembly, often caused by door flexing or water intrusion into door cavity
30%
Failed door handle switch or capacitive touch sensor assembly due to moisture exposure or mechanical wear
20%
Corroded or loose connector pins at door handle or BCM connection points from water intrusion
10%
Failed Body Control Module with internal circuit damage affecting door handle monitoring circuit
5%
Blown fuse or damaged power supply circuit to door handle module or keyless entry system
Diagnostic Steps
1
Step 1: Perform visual inspection of right front door handle assembly and wiring harness for obvious damage, water intrusion, or corrosion. Check door boot/grommet between door and body for cracks or splits that allow water entry
2
Step 2: Using a digital multimeter, test continuity and resistance of all wiring between the door handle connector and BCM connector according to vehicle wiring diagram. Test for shorts to ground and shorts to power on all signal circuits
3
Step 3: Inspect and clean all connector terminals at door handle and BCM. Check for spread pins, corrosion, or water contamination. Apply dielectric grease and reconnect, then clear code and test operation
4
Step 4: With connectors properly seated, use multimeter to verify proper voltage supply (typically 5V or 12V depending on system) at door handle connector with ignition on. Check ground circuit for less than 0.5 ohms resistance to chassis ground
5
Step 5: If wiring and power supply test good, substitute/swap door handle assembly with known good unit or test signal output from handle switch/sensor while activating. Monitor BCM data stream for proper signal recognition
6
Step 6: If all external components test acceptable, perform BCM functional test and consider BCM replacement or reprogramming if module fails to recognize proper input signals from verified good door handle
Estimated Repair Cost
$100 - $600
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected an electrical fault in the right front door handle circuit. This typically involves the exterior door handle mechanism, which may include a switch, sensor, or keyless entry touch pad depending on vehicle configuration. The BCM has identi...
The most common cause of B1487 (Door Handle Right Front Circuit Failure) is: Damaged or corroded wiring harness between BCM and door handle assembly, often caused by door flexing or water intrusion into door cavity
Typical repair costs for B1487 range from $100 to $600, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this is a convenience feature issue affecting door access or keyless entry function. Repair at convenience, though may result in inability to unlock door from outside using that handle or keyless entry touch pad.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1487 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Keyless Entry System
Difficulty
Type
Manufacturer
Recommended Tools
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