Sorry, the NHTSA has not posted this TSB document yet.
You can still get the detailed info from Cadillac for this TSB. Call your local Cadillac dealer's service department & ask for a copy of TSB# 16-NA-407.
Information on Chassis Control Module (CCM) Receives Invalid Data and Sets DTC
U0422
The Technician may find DTCs U0422 set.
The Technician may also find the following DTCs set.
• U1534
• U1538
Information
Based on analysis with the BCM team, during vehicle startup (on occasion) the PEPS module arbitration
along with high bus traffic leads to the BCM setting the door open switch virtual device availability (VDA) to
unavailable. The BCM does not update the VDA back to Available until the door switch changes state (this
signal is event based as opposed to periodic). The ICCM sets the U0422 DTC after 1 second of either the
door ajar VDA or door open VDA being unavailable.
Correction
Ignore CCM U0422 DTC (no service necessary) unless it is a current/active code or is accompanied by
associated BCM faults U1534 or U1538.
