What Does B1523 Mean?
B1523 indicates the Body Control Module (BCM) has detected an electrical fault in the Driver Information Center (DIC) switch circuit. This code is triggered when the BCM detects an open circuit, short to ground, short to voltage, or excessive resistance in the wiring or switch assembly that controls the DIC functions. The DIC allows the driver to access and control various vehicle information displays, trip computers, and settings through steering wheel or dash-mounted switches.
Common Causes
40%
Faulty DIC control switch assembly with worn contacts or internal failure
30%
Damaged, corroded, or loose wiring harness connections between DIC switch and BCM
20%
Broken or chafed wires in steering column or dash harness causing open or short circuit
10%
Failed Body Control Module unable to properly monitor switch circuit
Diagnostic Steps
1
Step 1: Perform visual inspection of DIC switch assembly and all accessible wiring harnesses for obvious damage, burned terminals, corrosion, or loose connections. Check connector pins for bent, pushed-back, or corroded terminals.
2
Step 2: Using a digital multimeter, test for proper voltage supply at the DIC switch connector (typically 5V or 12V reference depending on manufacturer). Verify ground circuit continuity with less than 0.5 ohms resistance to chassis ground.
3
Step 3: Disconnect DIC switch and measure resistance across switch terminals while actuating each button position. Compare readings to manufacturer specifications (typical range 0-5000 ohms depending on button pressed). A reading of infinite resistance or no change indicates switch failure.
4
Step 4: If switch tests good, perform continuity test on signal wire from DIC switch connector to BCM connector with harness disconnected at both ends. Check for shorts to ground or voltage with harness connected and switch disconnected.
5
Step 5: Monitor live data stream for DIC switch input values while actuating each button to verify BCM is receiving proper signals. If BCM shows no input change with known-good switch and wiring, suspect BCM fault.
6
Step 6: After repair, clear codes, perform DIC switch function test through all button positions, and road test to verify proper operation and confirm code does not return.
Estimated Repair Cost
$100 - $450
Parts + labor, varies by vehicle and location
B1523 indicates the Body Control Module (BCM) has detected an electrical fault in the Driver Information Center (DIC) switch circuit. This code is triggered when the BCM detects an open circuit, short to ground, short to voltage, or excessive resistance in the wiring or switch assembly that controls...
The most common cause of B1523 (Driver Information Center (DIC) Switch Circuit) is: Faulty DIC control switch assembly with worn contacts or internal failure
Typical repair costs for B1523 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 critical vehicle operation or safety systems. The DIC display functions may be inoperative or stuck, preventing access to trip computer, settings, and warning messages, but basic vehicle operation remains 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 B1523 to identify the root cause.
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Quick Info
Category
Body
System
Body Control and Driver Information System
Difficulty
Type
Manufacturer
Recommended Tools
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