Conditions for Clearing the MIL/DTC

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

A current DTC and malfunction indicator lamp (MIL) clear when the malfunction is no longer present.
A history DTC clears when requested by the scan tool or when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.

DTC U2100

Step	Action	Yes	No
Schematic Reference: Data Communication Schematics Connector End View Reference: Data Communication Connector End Views
1	Did you perform the Diagnostic System Check - Vehicle?	Go to Step 2	Go to Diagnostic System Check - Vehicle
2	Turn OFF the ignition. Disconnect all modules that communicate on controller area network (CAN) bus. Test all CAN serial data circuits between modules for the following: Short to ground Short to voltage Open Short between CAN high and CAN low circuits Turn ON the ignition, with the engine OFF, when testing for a short to voltage. Refer to the following: Circuit Testing Wiring Repairs Did you find and correct the condition?	Go to Step 8	Go to Step 3
3	Reconnect the module that had set the DTC. If the DTC was set in multiple modules, reconnect the engine control module (ECM)/powertrain control module (PCM). Turn ON the ignition, with the engine OFF. Retrieve DTCs from the module. Does the DTC U2100 still set as current?	Go to Step 6	Go to Step 4
4	Repeat the following steps until the DTC is set or all modules are connected. Turn OFF the ignition. Reconnect the other disconnected modules one at a time in the following order: ECM/PCM or transmission control module (TCM) Electronic brake control module (EBCM) Body control module (BCM) Turn ON the ignition, with the engine OFF. Retrieve DTCs from the first connected module, in the previous step. Does the scan tool displays DTC U2100 as current?	Go to Step 5	Go to Testing for Intermittent Conditions and Poor Connections
5	Turn OFF the ignition. Disconnect the last module connected. Inspect for poor connections at CAN serial data circuits of the suspected module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 8	Go to Step 7
6	Turn OFF the ignition. Disconnect the module that set the DTC as current. Inspect for poor connections at CAN serial data circuits of the suspected module. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition?	Go to Step 8	Go to Step 7
7	Replace the suspected module. Refer to Control Module References for replacement, setup and programming. Did you complete the replacement?	Go to Step 8	-
8	Connect all modules and connectors. Connect the scan tool to the DLC. Turn ON the ignition, with the engine OFF. Retrieve DTCs. Is the DTC U2100 still set as current?	Go to Step 2	System OK