What Does B1527 Mean?
This code indicates the Body Control Module (BCM) has detected a malfunction in the Driver Information Center (DIC) switch circuit. The DIC switch allows the driver to navigate menus and display different information on the instrument cluster display. The BCM has identified an open circuit, short circuit, or invalid signal from one or more buttons in the DIC switch assembly.
Common Causes
45%
Faulty DIC switch assembly with worn contacts or internal failure
30%
Damaged wiring harness or corroded connector between BCM and DIC switch
15%
Water intrusion or contamination in DIC switch causing short circuit
10%
BCM internal fault or poor ground connection
Diagnostic Steps
1
Step 1: Perform visual inspection of DIC switch assembly for physical damage, liquid contamination, or stuck buttons. Test each button function while monitoring live data for proper response.
2
Step 2: Disconnect DIC switch connector and inspect terminals for corrosion, bent pins, or moisture. Clean terminals with electrical contact cleaner if contamination is present.
3
Step 3: Using a digital multimeter, measure resistance across each DIC button circuit with switch disconnected. Compare readings to manufacturer specifications (typically 0-5 ohms closed, infinite ohms open).
4
Step 4: Check continuity of wiring harness between DIC switch connector and BCM connector. Verify no shorts to ground or power using multimeter ohm function.
5
Step 5: Verify BCM ground circuit integrity by measuring voltage drop between BCM ground and battery negative (should be less than 0.1V with circuit loaded).
6
Step 6: If all circuits test normal, replace DIC switch assembly and clear codes. Road test vehicle and verify proper operation of all DIC functions.
Estimated Repair Cost
$75 - $350
Parts + labor, varies by vehicle and location
This code indicates the Body Control Module (BCM) has detected a malfunction in the Driver Information Center (DIC) switch circuit. The DIC switch allows the driver to navigate menus and display different information on the instrument cluster display. The BCM has identified an open circuit, short ci...
The most common cause of B1527 (Driver Information Center (DIC) Switch Circuit) is: Faulty DIC switch assembly with worn contacts or internal failure
Typical repair costs for B1527 range from $75 to $350, depending on the vehicle, location, and whether you do it yourself or go to a shop.
Safe to continue driving as this does not affect vehicle operation or safety systems. This only impacts the ability to access and view information displays, which is a convenience feature requiring non-urgent repair.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1527 to identify the root cause.
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Quick Info
Category
Body
System
Driver Information and Instrumentation System
Difficulty
Type
Manufacturer
Recommended Tools
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