What Does B1535 Mean?
This code indicates the Body Control Module (BCM) has detected an electrical fault in the Driver Information Center (DIC) switch circuit. The DIC switch allows the driver to navigate menus and control various information displays on the instrument cluster. The BCM has identified an open circuit, short to ground, short to power, or abnormal resistance in the switch circuitry or its connections.
Common Causes
35%
Faulty DIC switch with internal contact failure or wear
30%
Damaged or corroded wiring harness connections between DIC switch and BCM
20%
Water intrusion or corrosion at switch connector causing intermittent contact
10%
Failed Body Control Module with internal circuit damage
5%
Broken or chafed wiring between switch and BCM causing short or open circuit
Diagnostic Steps
1
Step 1: Perform a visual inspection of the DIC switch on the steering wheel or dashboard for physical damage, wear, or debris. Check for proper switch operation by pressing buttons while monitoring live data for switch state changes on scan tool.
2
Step 2: Inspect the wiring harness connector at the DIC switch for corrosion, pushed-out pins, or water intrusion. Disconnect connector and measure resistance across each switch terminal to ground with multimeter (should read open circuit when switch not pressed, specific resistance when pressed per service manual specifications).
3
Step 3: Check continuity of wiring between DIC switch connector and BCM connector using wiring diagram. Disconnect both ends and measure resistance through each circuit wire (should be less than 5 ohms). Check for shorts to ground or power with all connectors disconnected.
4
Step 4: If wiring and connections test good, substitute a known-good DIC switch assembly to verify switch failure. If issue persists with known-good switch, verify BCM ground connections and power supply circuits are within specification.
5
Step 5: Clear codes and perform functional test of DIC switch operation through all menu functions. Road test vehicle and monitor for code recurrence using scan tool live data.
Estimated Repair Cost
$150 - $450
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected an electrical fault in the Driver Information Center (DIC) switch circuit. The DIC switch allows the driver to navigate menus and control various information displays on the instrument cluster. The BCM has identified an open circuit, sho...
The most common cause of B1535 (Driver Information Center (DIC) Switch Circuit) is: Faulty DIC switch with internal contact failure or wear
Typical repair costs for B1535 range from $150 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Vehicle is safe to drive as this affects only the information display controls and does not impact vehicle operation or safety systems. Repair at convenience, though lack of DIC functionality may prevent monitoring of important vehicle information like fuel economy, tire pressure warnings, or maintenance reminders.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1535 to identify the root cause.
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Quick Info
Category
Body
System
Driver Information and Body Control System
Difficulty
Type
Manufacturer
Recommended Tools
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