DTC U1305: Loss Of Class 2 Serial Data Communication: Description

Modules connected to class 2 serial data circuit monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among modules. In addition to this, node alive messages are transmitted by each module on class 2 serial data circuit once every 2 seconds. When a module detects class 2 serial data circuit shorted, storing of all other class 2 serial communication DTCs is inhibited and a U1300, U1301, or a U1305 DTC will be stored. Module uses default values for all parameters received on class 2 serial data circuit. A current DTC clears when malfunction no longer exists. A history DTC clears when module ignition cycle counter reaches reset threshold, without a repeat of malfunction.