Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2019BLAZER PREMIER, FWDREPAIR AND DIAGNOSIS (SINGLE PAGE)ACCESSORIES & EQUIPMENTDRIVERS ASSISTANCE SYSTEMS - ADASIMAGE DISPLAY CAMERASDIAGNOSTIC INFORMATION AND PROCEDURESDTC B395A (WITH UV2, IN RADIO)CIRCUIT/SYSTEM TESTING
2019 Chevrolet Blazer Premier, FWD
Circuit/System Testing
2019 Chevrolet Blazer Premier, FWDSECTION Circuit/System Testing
- Ignition/Vehicle & All vehicle systems - Off
- Disconnect the electrical connector: X5 @ A11 Radio
- Disconnect the electrical connector: X3 @ K157 Video Processing Control Module
- Locate the appropriate pinout adapter and load test loop adapter from EL-52552 COAX FAKRA Cable Adaptor Kit.
- Connect the 2 adapters together, measure and record the resistance between the terminals at the pinout adapter.
- Disconnect the 2 adapters and connect each one to the appropriate end of the coax cable.
- At the pinout adapter test terminals, measure the total resistance of the coax cable loop including the connected load test adapter.
- If not within 5 Ω of the reading from step 5.
Replace the coax cable
- Go to next step: If within 5 Ω of the reading from step 5.
- If not within 5 Ω of the reading from step 5.
- Replace the component: K157 Video Processing Control Module
- Apply the parking brake.
- Engine Running Transmission in Reverse
- Verify DTC B395A is not set.
- If the DTC is set
Replace the component: A11 Radio
- Go to next step: If the DTC is not set
- If the DTC is set
- All OK.
NOTE:
Before testing the coax cable, check the cable's exterior for being pinched, cut, damaged, or having loose connections at the components, all of which can cause reception issues.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.