LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1162 (AUTOMATIC TRANSAXLE DIAGNOSTICS (DTC P1820, 3.4l TO DTC U2105, 3.6L) - 4T65-E) >> Diagnosis >> DTC U2105 (3.6L) >> Test Description

Test Description

WARNING: This page is about a different car, the 2004 Pontiac Aztek and 2004 Buick Rendezvous. However, it is still accessible from the selected car via links, so may be relevant.

The number below refers to the step number on the diagnostic table.

  1. 2:  Performing this step verifies that an operational abnormality did not take place during TCM power-up, such as Electromagnetic Interference (EMI).
DTC U2105 (3.6L)

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check - Engine Controls? - Go to Step 2  Go to Diagnostic System Check - Engine Controls in Engine Controls - 3.6L
2 
  1. Install a scan tool.
  2. Turn ON the ignition with the engine OFF.
    3. IMPORTANT:
    • Before clearing the DTC, use the scan tool in order to record the ECM Freeze Frame and the TCM Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the ECM and the TCM.
    • Using the Clear Info function erases stored DTCs in both the ECM and TCM.
  3. Record the DTC Failure Records.
  4. Clear the DTC.
  5. Turn OFF the ignition for at least 30 seconds.
  6. Turn ON the ignition with the engine OFF.
Did DTC U2105 reset?		 - Go to Step 3  Go to Intermittent Conditions in Engine Controls - 3.6L
3 Did you record a Failure record for any ECM DTCs? - Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 3.6L Go to Step 4 
4 Test the CAN serial data low circuit and the CAN serial data high circuit between the TCM and the ECM for the following conditions:
Did you find a condition?		 - Go to Step 5  Go to Step 6 
5 Repair the wiring as necessary.
Refer to Wiring Repairs in Wiring Systems.
Is the action complete?		 - Go to Step 7  -
6 Replace the ECM.
Refer to Engine Control Module (ECM) Replacement in Engine Controls - 3.6L.
Is the action complete?		 - Go to Step 7  -
7 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Turn ON the ignition, with the engine OFF.
  4. Select Specific DTC.
  5. Enter DTC U2105.

Has the test run and passed?		 - Go to Step 8  Go to Step 2 
8 With the scan tool, observe the stored information, capture info and DTC info.
Does the scan tool display any DTCs that you have not diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List in Engine Controls - 3.6L System OK
scientia non olet · About LEMON Manuals