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Powertrain Interface Module – V6 Page 6E1–35
Step Action Yes No 11 1 Using Tech 2, clear the DTCs. 2 Switch off the ignition for 30 seconds. 3 Start the engine. 4 Operate the vehicle within the conditions for running the DTC. Does DTC U2100 fail this ignition cycle? Go to Step 2 Go to Step 12 12 Using Tech 2, select the DTC display function. Does Tech 2 display any DTCs? Go to the appropriate DTC Table System OK When all diagnosis and repairs are completed, clear all DTCs and check the system for correct operation. 9.3 DTC U2105 – CAN Bus No DTC Description This diagnostic procedure supports DTC U2105 – CAN Bus No Communication From ECM (Engine Control Module). Circuit Description The transmission control module (TCM) and engine control module (ECM) transmit and receive data using the GM LAN As the GM LAN and keyword 2000 protocols are not compatible, a powertrain interface module (PIM) is integrated into The PIM continuously receives messages from the ECM. If the PIM does not receive a message within a predetermined Additional Information • Refer to 6 Wiring Diagram and Connector for the following information: • PIM connector illustration and terminal assignment, and • PIM wiring diagram. • Refer to 6C1-2 Engine Management – V6 – Diagnostics for diagnostic information. • For intermittent fault conditions, refer to Intermittent Fault Conditions. • Since fault conditions in a wiring connector may trigger DTCs, always test the connectors related to this diagnostic Conditions for Running the DTC Conditions for running the DTC are: • The ignition is switched on. • The ignition voltage is 10.0 – 16.0 V. Conditions for Setting the DTC The PIM does not receive a message from the ECM for 100 milliseconds. Action Taken When the DTC Sets • When the DTC sets, the following warning lamps may be displayed on the instrument cluster: |