DTC U1153: Loss Of Serial Communications - CCP: Description

When ignition switch is in RUN position, control modules that communicate on class 2 data bus transmit a State Of Health (SOH) message every 2 seconds to indicate system is operating properly. DTC U1153 will set when PZM does not receive SOH message from Climate Control Panel (CCP) after 3 consecutive monitoring cycles. DTC U1153 will clear when CCP transmits SOH message to PZM.