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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Automatic Transmission (DTC P0743 To DTC U2105)) >> Diagnosis >> DTC U2105 (Non Europe or N. American Emissions) >> Cause for Failure

Cause for Failure

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DTC U2105 (Non Europe or N. American Emissions)

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Automatic Transmission? - Go to Step 2  Go to Diagnostic System Check - Automatic Transmission
2
  1. Turn OFF the ignition.
  2. Install the scan tool.
  3. With the engine OFF, turn the ignition switch to the ON position.
  4. Select Store Freeze Frame/Failure Records from the Diagnostic Trouble Codes Information menu.
  5. Store Freeze Frame/Failure Records.
  6. Select Clear DTC Information from the Diagnostic Trouble Codes Information menu.
  7. Clear DTC Information.
  8. Perform 1 vehicle drive cycle.
Is the hold lamp ON?		 - Go to Step 3  Go to Step 7 
3
  1. Select Request DTC by Status from the Diagnostic Trouble Codes Information menu.
  2. Request DTC by Status.
Is DTC U2105 displayed?		 - Go to Step 4  Go to Step 7 
4
  1. Turn OFF the ignition.
  2. Disconnect the transmission control module (TCM) wiring connector and engine control module (ECM) wiring connector.
  3. Measure the resistance between terminal A17 of the TCM wiring connector and terminal K14, or B14, or 88 of the ECM wiring connector.
  4. Measure the resistance between terminal A7 of the TCM wiring connector and terminal K15, or B30, or 57 of the ECM wiring connector.
Is the resistance within the specified values?		 0 Ω Go to Step 5  Go to Step 6 
5
  1. Turn ON the ignition.
  2. Measure the voltage of terminal A17.
  3. Measure the voltage of terminal A7.
Is the voltage within the specified range?		 11-14 V Go to Step 6  Go to Step 8 
6 Repair the malfunctioning terminals as necessary.
Did you complete the repair?		 - System OK -
7 Repair the temporary connection failure of the connector. Refer to Transmission Control Module (TCM) Replacement .
Did you complete the repair?		 - System OK -
8
  1. Replace the TCM. Refer to Transmission Control Module (TCM) Replacement .
  2. Turn OFF the ignition.
  3. Turn ON the ignition.
  4. Verify if DTC U2105 is set.
Is the DTC set?		 - Go to Step 9  Go to Step 10 
9 Replace the ECM.
Did you complete the replacement?		 - Go to Step 10  -
10
  1. After the repair, use a scan tool clear info function and road test the vehicle.
  2. Review the DTC info.
Has the last test failed or is the current DTC displayed?		 - Go to Step 1  System OK
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