U1176, Loss Of Serial Communications - RKE: Notes
WARNING: This page is about a different car, the 1997 Cadillac Catera. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
To identify wire colors and components on Class 2 serial data line, see appropriate wiring diagram in DATA LINK CONNECTORS article in WIRING DIAGRAMS.
Every 2 seconds while ignition switch is in RUN position, control modules that communicate on class 2 data bus transmit a performance condition signal to indicate system is operating properly. Signal is then transmitted to BCM. DTC U1176 will set when BCM does not receive signal from Remote Control Door Lock Receiver (RCDLR) module after 3 consecutive monitoring cycles. DTC U1176 will clear when RCDLR module transmits signal to BCM or when scan tool is used.