What Does B1524 Mean?
B1524 indicates the Body Control Module (BCM) has detected a malfunction in the Driver Information Center (DIC) switch circuit. This code means there is an open circuit, short to ground, short to voltage, or high resistance in the wiring or switches that control the DIC display functions. The BCM monitors the switch inputs and sets this code when voltage or resistance values fall outside normal operating parameters.
Common Causes
45%
Faulty DIC switch assembly or button contacts worn/stuck
30%
Damaged or corroded wiring harness between BCM and DIC switches
15%
Corroded or loose connector at DIC switch or BCM
10%
Failed Body Control Module (BCM) with internal circuit fault
Diagnostic Steps
1
Step 1: Perform visual inspection of DIC switch assembly for physical damage, stuck buttons, or signs of liquid intrusion. Test each DIC button for proper tactile feedback and function.
2
Step 2: Using a digital multimeter, check for proper voltage supply at DIC switch connector (typically 5V or 12V reference). With key on, verify ground circuit has less than 0.1V resistance to chassis ground.
3
Step 3: Disconnect DIC switch connector and measure resistance of each switch circuit while pressing corresponding buttons. Compare readings to factory specifications (typically open circuit when not pressed, near 0 ohms or specific resistance values when pressed).
4
Step 4: Inspect wiring harness from DIC switch to BCM for chafing, pinching, or corrosion. Pay special attention to areas where harness passes through firewall or near moving components. Check connector terminals for corrosion, bent pins, or signs of water intrusion.
5
Step 5: If all circuits and switches test within specification, perform BCM power and ground verification. Check for proper voltage at BCM power supply pins and verify all ground circuits have less than 0.2V drop.
6
Step 6: Clear codes, test drive vehicle while cycling through all DIC functions. Monitor live data for switch input signals at BCM to confirm repair and verify code does not return.
Estimated Repair Cost
$75 - $450
Parts + labor, varies by vehicle and location
B1524 indicates the Body Control Module (BCM) has detected a malfunction in the Driver Information Center (DIC) switch circuit. This code means there is an open circuit, short to ground, short to voltage, or high resistance in the wiring or switches that control the DIC display functions. The BCM mo...
The most common cause of B1524 (Driver Information Center (DIC) Switch Circuit) is: Faulty DIC switch assembly or button contacts worn/stuck
Typical repair costs for B1524 range from $75 to $450, depending on the vehicle, location, and whether you do it yourself or go to a shop.
This is safe to drive as it only affects information display controls and does not impact vehicle operation or safety systems. Repair can be scheduled at convenience, though loss of DIC functionality may prevent monitoring trip computer, fuel economy, and other convenience features.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1524 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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