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 U2104
| 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:Did you find and correct the condition? |
Go to Step 8 |
Go to Step 3 |
| 3 |
- Reconnect the body control module (BCM).
- Turn ON the ignition, with the engine OFF.
- Retrieve DTCs from the BCM.
Does the DTC U2104 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:
- Electronic brake control module (EBCM), if equipped
- Transmission control module (TCM), w/L61
- Engine control module (ECM)/powertrain control module (PCM)
- 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 U2104 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 BCM.
- 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 U2104 still set as current? |
Go to Step 2 |
System OK |