What Does B1619 Mean?
This code indicates the Body Control Module (BCM) has detected a fault in the rear wiper motor's lower limit position sensor or its associated circuit. The BCM monitors the rear wiper motor position to determine when the wiper blade reaches its park position (rest position at bottom of travel). When the expected low limit signal is not received or is out of specification, this code sets.
Common Causes
40%
Faulty rear wiper motor with internal position sensor failure or worn motor brushes
30%
Damaged or corroded wiring harness between BCM and rear wiper motor, including connector terminals
20%
Mechanical binding or obstruction preventing wiper from reaching park position
10%
Failed Body Control Module (BCM) with internal circuit fault
Diagnostic Steps
1
Step 1: Perform visual inspection of rear wiper operation - manually cycle rear wiper through full range and observe if it returns to proper park position; check for binding, obstruction, or mechanical interference in wiper linkage
2
Step 2: Inspect rear wiper motor connector and wiring harness for corrosion, water intrusion, damaged pins, or chafed wires; check ground connection continuity with multimeter (should be less than 1 ohm to chassis ground)
3
Step 3: Using multimeter, backprobe the wiper motor position sensor signal wire while cycling wiper motor - verify voltage changes appropriately as wiper moves through range (typical specifications: 0.5-4.5V DC, consult service data for vehicle-specific values)
4
Step 4: If wiring and signals are correct, remove rear wiper motor and bench test - apply 12V power directly and verify motor operates smoothly through full range and position sensor outputs proper resistance or voltage values
5
Step 5: If motor tests good on bench but fails in vehicle, inspect mounting alignment and linkage for binding; if motor fails bench test, replace rear wiper motor assembly and verify proper installation and park position
6
Step 6: Clear codes, cycle rear wiper through 10-15 complete cycles, and verify code does not return; confirm wiper parks correctly in low limit position each time
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a fault in the rear wiper motor's lower limit position sensor or its associated circuit. The BCM monitors the rear wiper motor position to determine when the wiper blade reaches its park position (rest position at bottom of travel). When...
The most common cause of B1619 (Wiper Rear Low Limit Input Circuit Failure) is: Faulty rear wiper motor with internal position sensor failure or worn motor brushes
Typical repair costs for B1619 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this only affects rear window visibility cleaning function. Repair at convenience, though reduced rear visibility in inclement weather may be a concern for SUVs and hatchbacks relying on rear wiper operation.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1619 to identify the root cause.
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Quick Info
Category
Body
System
Body Electrical - Rear Wiper System
Difficulty
Type
Manufacturer
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