What Does B1515 Mean?
B1515 indicates a malfunction in the Driver Information Center (DIC) switch circuit, which controls the interface buttons used to navigate menus and display vehicle information on the instrument cluster. The Body Control Module (BCM) has detected an abnormal voltage, resistance, or signal from one or more DIC switches, indicating an open circuit, short to ground, short to voltage, or internal switch failure. This prevents proper operation of the DIC controls and may disable access to vehicle settings, trip computer functions, and system menus.
Common Causes
45%
Faulty DIC switch assembly with worn contacts, stuck buttons, or internal component failure
30%
Damaged or corroded wiring harness connector at DIC switch or BCM with spread terminals or water intrusion
15%
Open or shorted wiring between DIC switch and BCM due to chafing, pinching, or broken conductors
10%
BCM internal fault or software corruption affecting DIC switch input processing
Diagnostic Steps
1
Step 1: Perform visual and tactile inspection of DIC switch assembly for physical damage, stuck buttons, liquid intrusion, or obvious defects. Operate each DIC button while observing scan tool data for switch state changes.
2
Step 2: Disconnect DIC switch connector and inspect terminals for corrosion, bent pins, or water damage. Clean connector with electrical contact cleaner if contamination is present. Check connector locking mechanism for proper engagement.
3
Step 3: With DIC switch disconnected, use digital multimeter to test switch resistance across each button circuit per manufacturer specifications (typically 0-5000 ohms depending on button). Compare readings to known good values or service manual data.
4
Step 4: Measure voltage supply to DIC switch assembly (typically 5V or 12V reference) with ignition on and verify ground circuit continuity (should be less than 1 ohm to chassis ground). Check for proper voltage at BCM connector if supply voltage is absent.
5
Step 5: Test wiring harness continuity between DIC switch connector and BCM connector for each circuit. Check for shorts to ground or voltage by measuring resistance to ground and battery voltage with circuits disconnected at both ends.
6
Step 6: If all circuits test normal, substitute known-good DIC switch assembly or perform BCM relearn/recalibration procedure. Clear codes, cycle ignition, and verify switch operation and code erasure. If code returns immediately, suspect BCM fault.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
B1515 indicates a malfunction in the Driver Information Center (DIC) switch circuit, which controls the interface buttons used to navigate menus and display vehicle information on the instrument cluster. The Body Control Module (BCM) has detected an abnormal voltage, resistance, or signal from one o...
The most common cause of B1515 (Driver Information Center (DIC) Switch Circuit) is: Faulty DIC switch assembly with worn contacts, stuck buttons, or internal component failure
Typical repair costs for B1515 range from $75 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 code only affects convenience features and information display controls. Repair is not urgent but should be addressed to restore full functionality of vehicle settings and trip computer access.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1515 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Driver Interface System
Difficulty
Type
Manufacturer
Recommended Tools
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