DTC U1016, Loss Of Serial Communications - Pcm: Notes
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 PZM. DTC U1016 will set when PZM does not receive signal from Powertrain Control Module (PCM) after 3 consecutive monitoring cycles. DTC U1016 will clear when PCM transmits signal to PZM.