U2100

DTC U2100

CIRCUIT DESCRIPTION
The Controller Area Network (CAN) serial data line is a high speed serial data bus used to communicate information between the engine control module (ECM) and the transmission control module (TCM). Typical data-transmission speeds must be high enough to ensure that the required real-time response is maintained.

The CAN serial data line does not communicate with the scan tool via the DLC. CAN serial data information is interpreted by the ECM and transmitted to the serial data line by the ECM.

CONDITIONS FOR RUNNING THE DTC
The CAN circuits are monitored continuously by the modules on the circuit. The only requirement is that the modules are in a RUN power mode.

CONDITIONS FOR SETTING THE DTC
The module setting the DTC has attempted to establish communications on the CAN circuits for more than 5 seconds.

ACTION TAKEN WHEN THE DTC SETS
The module uses a default value for the missing parameter.

CONDITIONS FOR CLEARING THE MIL/DTC
- A current DTC clears and the MIL is turned OFF when the fault is no longer present.
- A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the fault.

TEST

Steps 1-2:

Steps 3-7:

Step 8: