Conditions for Clearing the DTC

WARNING: This page is about a different car, the 2003 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.

The MIL is cleared, turned OFF, and the DTC is cleared by a different strategy for each module.

ECM
- If the fault is not detected 3 consecutive drive cycles, the current DTC is cleared and the MIL is turned OFF.
- The history DTC is cleared if the malfunction does not reoccur for 40 consecutive drive cycles.
- The history DTC is cleared if there is a KAM reset (battery disconnected).
TCM
- If the fault is not detected one consecutive drive cycle, the current DTC is cleared.
- The history DTC is cleared if the malfunction does not reoccur for 40 consecutive drive cycles.
EBCM
- If the fault is not detected on consecutive drive cycle, the current DTC is cleared and the TCS LED is illuminated.
- The history DTC is cleared if the malfunction does not reoccur for 40 consecutive drive cycles.
BCM
- If the fault is not detected 3 consecutive drive cycles, the current DTC is cleared and the MIL is turned OFF.
- The history DTC is cleared if the malfunction does not reoccur for 40 consecutive drive cycles.
- The history DTC is cleared if there is a KAM reset (battery disconnected).

DTC U2105-U2108

Step	Action	Yes	No
Schematic Reference: Data Link Connector (DLC) Schematics (A/T) or Data Link Connector (DLC) Schematics (M/T) Connector End View Reference: Master Electrical Component List in Wiring Systems.
1	Did you perform the Diagnostic System Check for the system exhibiting the symptom?	Go to Step 2	Go to Control Module References in Body Control System for the applicable Diagnostic System Check
2	Install the scan tool. Turn ON the ignition, with the engine OFF. With the scan tool, communicate with the BCM, EBCM, ECM, and TCM. Monitor the DTC information for DTC U2100. Monitor the DTC information for DTCs in the range of U2102-U2104. Does the scan tool indicate that DTC U2100 or DTCs in the range of U2102-U2104 as either current or history DTCs?	Go to Diagnostic Trouble Code (DTC) List	Go to Step 3
3	Test all battery positive and ignition positive circuits of the module that is not communicating for opens or shorts to ground. Test all grounds of the module that is not communicating for opens. Did you find and correct the concern?	Go to Step 4	Go to Step 5
4	Use the scan tool in order to clear the DTCs. Turn OFF the ignition switch. Wait at least 10 seconds. Turn the ignition ON, with the engine OFF. Retrieve DTCs from the ECM, EBCM, TCM, and BCM. Does the DTC reset?	Go to Step 7	System OK
5	Test all CAN serial data circuits between the module setting the DTC and the module that is not communicating for opens, shorts to voltage, shorts to ground, and shorts between CAN circuits. Did you find and correct the concern?	Go to Step 4	Go to Step 6
6	Inspect for poor connections at the harness connector of the module that is not communicating. Did you find and correct the condition?	Go to Step 7	Go to Step 10
7	Inspect the connector of the module recording the DTC. Did you find and correct the condition?	Go to Step 8	Go to Step 9
8	Use the scan tool in order to clear the DTCs. Turn OFF the ignition switch. Wait at least 10 seconds. Turn the ignition ON, with the engine OFF. Retrieve the DTCs from the EBCM, ECM, TCM, and BCM. Does the DTC reset?	Go to Step 2	System OK
9	IMPORTANT: Perform the programming or set up procedure for the replaced control module if required. Replace the control module that has set the DTC. Refer to Control Module References in Body Control System for the applicable replacement procedure.Did you complete the replacement?	Go to Step 8	-
10	IMPORTANT: Perform the programming or set up procedure for the replaced control module if required. Replace the control module that is not communicating. Refer to Control Module References in Body Control System for the applicable replacement procedure.Did you complete the replacement?	Go to Step 4	-