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 7 X2. 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 7 X2. Ignition ON.
- Verify that the DTC U2098 or DTC U0029 02 remains current.
- If the DTC becomes history
Replace the MOST device that was just disconnected.
- If the DTC remains current
- If the DTC becomes 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, disconnect the X2 harness connector at the A11 Radio.
- Test for infinite resistance between the MOST control circuit terminal 7 X2 at the A11 Radio and ground.
- If less than infinite resistance
Repair the short to ground on the circuit.
- If infinite resistance
- If less than infinite resistance
- Replace the A11 Radio.
Use the Manual With the Right Hardware
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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.