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.
Circuit/System Testing
Use the schematics to determine which MOST devices are on the A11 Radio's MOST control circuit. Use the connector end views to identify the MOST control circuit terminal for each of those MOST devices.
- Ignition OFF, disconnect the harness connectors at an easily accessible MOST device that shares the A11 Radio's MOST control circuit. Ignition ON.
- Verify that the DTC U2098 or DTC U0029 02 remains current.
- If the DTCs become history
Replace the MOST device that was just disconnected.
- Go to next step: If any of the DTCs remain current
- If the DTCs become history
- With the prior devices disconnected, repeat steps 1 and 2 for each MOST device on the MOST control circuit except the A11 Radio.
- Ignition OFF and all vehicle systems OFF, disconnect the X2 harness connector at the A11 Radio.
- Test for infinite resistance between the MOST control circuit terminal at the A11 Radio and ground.
- If less than infinite resistance
Repair the short to ground on the circuit.
- Go to next step: If infinite resistance
- If less than infinite resistance
- Replace the A11 Radio.
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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.