What Does B1536 Mean?
This code indicates that the Body Control Module (BCM) has detected an electrical fault in the Driver Information Center (DIC) switch circuit. The DIC switches allow the driver to control display functions, trip computer settings, and menu navigation on the instrument cluster. The BCM has identified an open circuit, short to ground, short to power, or excessive resistance in the switch circuitry.
Common Causes
35%
Faulty DIC switch assembly with worn contacts or internal failure
30%
Damaged or corroded wiring harness/connector between BCM and DIC switch
20%
Poor ground connection or broken ground circuit for DIC switch
15%
BCM internal fault or software corruption affecting switch input monitoring
Diagnostic Steps
1
Step 1: Perform visual inspection of DIC switch assembly for physical damage, stuck buttons, or liquid contamination. Check steering column area for damaged wiring or pinched harnesses.
2
Step 2: Using a digital multimeter, verify reference voltage (typically 5V or 12V) at the DIC switch connector with key on, engine off. Check for proper ground continuity (less than 1 ohm resistance to chassis ground).
3
Step 3: Disconnect DIC switch and measure resistance values while pressing each button individually. Compare readings to manufacturer specifications (typically different resistance values for each switch position).
4
Step 4: Inspect wiring harness and connectors between DIC switch and BCM for corrosion, bent pins, or spread terminals. Repair or replace as needed.
5
Step 5: If all circuits and switch test normal, test BCM switch input circuit by backprobing BCM connector and simulating switch resistance values with a decade resistance box to verify BCM can detect inputs.
6
Step 6: Clear codes, verify repair by operating all DIC switch functions through their full range, and road test to confirm code does not return.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
This code indicates that the Body Control Module (BCM) has detected an electrical fault in the Driver Information Center (DIC) switch circuit. The DIC switches allow the driver to control display functions, trip computer settings, and menu navigation on the instrument cluster. The BCM has identified...
The most common cause of B1536 (Driver Information Center (DIC) Switch Circuit) is: Faulty DIC switch assembly with worn contacts or internal failure
Typical repair costs for B1536 range from $100 to $450, 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. The DIC display functions and trip computer controls will be inoperative or erratic, but essential driving functions remain unaffected. Repair at earliest convenience.
Start by connecting an OBD2 scanner to read the code and any freeze frame data. Then follow the diagnostic steps specific to B1536 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Driver Interface Systems
Difficulty
Type
Manufacturer
Recommended Tools
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