Lost Communication With Left Rear Temperature Actuator B

Where it lives

For U0660, the description names the actuator as the part involved.

Check these first

• The bus loses the left rear temperature actuator B
• A failed actuator B motor
• A binding rear blend door
• A broken return spring in actuator B
• A lost command signal to the left rear actuator B

What to do next

1. Read left rear temperature actuator B on a scan tool
2. Inspect the rear blend door linkage
3. Check the actuator B connector and wiring
4. Test the actuator B motor
5. Replace the left rear temperature actuator B if it stays offline
6. Clear the code and retest

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