October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Audio System Transceiver Module Replacement (U42) , Audio System Transceiver Module Replacement (U42/C3U)
Control Module References for Rear Audio/HVAC Module replacement, setup, and programming