What Does B1597 Mean?
This code indicates that the Body Control Module (BCM) has detected a short to ground in the electrical circuit for the driver's seat seatback autoglide forward switch. This switch is part of the power seat memory or easy-entry/exit system that automatically moves the seatback forward for easier ingress/egress. The BCM detected an abnormally low resistance or voltage in the switch circuit, indicating the circuit is grounded when it shouldn't be.
Common Causes
40%
Damaged wiring harness or chafed insulation causing direct ground contact under the seat or seat track
30%
Faulty autoglide forward switch with internal short to ground
20%
Corroded or moisture-damaged connector pins at the seat switch or BCM connections
10%
Failed seat control module or internal BCM circuit fault
Diagnostic Steps
1
Step 1: Perform a visual inspection of all wiring harnesses under the driver's seat and along the seat tracks for visible damage, chafing, pinching, or signs of rubbing against metal components. Check for any liquid intrusion or corrosion.
2
Step 2: Disconnect the autoglide forward switch connector and measure resistance from the switch signal wire to ground with a digital multimeter (should read infinite resistance/open circuit). If reading near 0 ohms, the fault is in the wiring harness between the switch and BCM.
3
Step 3: With switch disconnected, measure resistance through the switch itself between the signal terminal and ground terminal while actuating the switch (should show open circuit when not pressed, specific resistance when pressed per manufacturer specs). Replace switch if shorted internally.
4
Step 4: Inspect all connector pins for corrosion, bent terminals, or moisture intrusion at both the switch connector and the BCM connector. Clean or replace connectors as needed, ensuring proper seal integrity.
5
Step 5: If wiring harness shows external damage, repair or replace the affected section of harness, ensuring proper routing away from moving seat components and sharp metal edges.
6
Step 6: Clear the code, operate the autoglide function through multiple cycles, and verify the code does not return. Monitor live data from the BCM to confirm proper switch circuit voltage levels (typically 5V or 12V reference when not activated).
Estimated Repair Cost
$150 - $650
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected a short to ground in the electrical circuit for the driver's seat seatback autoglide forward switch. This switch is part of the power seat memory or easy-entry/exit system that automatically moves the seatback forward for easier ing...
The most common cause of B1597 (Driver's Seat Seatback Autoglide Forward Switch Circuit Short to Ground) is: Damaged wiring harness or chafed insulation causing direct ground contact under the seat or seat track
Typical repair costs for B1597 range from $150 to $650, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This code does not affect vehicle drivability or safety systems and the vehicle is safe to drive. The only impact is loss of the automatic seatback forward function for easier entry/exit, with manual seat adjustment still fully functional.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1597 to identify the root cause.
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Quick Info
Category
Body
System
Power Seat Control System / Body Electrical
Difficulty
Type
Manufacturer
Recommended Tools
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