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Home >> Chevrolet >> 2005 >> Aveo Base, 4D Hatchback >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Automatic Transaxle - AISIN 81-40LE - DTC P0742 To DTC P0977) >> DTC P0742 (Non European or N. American Emissions) >> Cause of Failure

Cause of Failure

WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
Step Action 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 DTC Information menu.
  5. Store Freeze Frame/Failure Records.
  6. Select Clear DTC Information from the DTC Information menu.
  7. Clear the DTC information.
  8. Perform 2 vehicle drive cycles.
Is the hold lamp ON?		 Go to Step 3  Go to Step 7 
3
  1. Select Request DTC by Status from the DTC Information menu.
  2. Request DTC by Status.
Is DTC P0742 displayed?		 Go to Step 4  Go to Step 7 
4
  1. Turn OFF the ignition.
  2. Replace the master transmission control module (TCM) and perform simulation test again under user condition.
Is DTC P0742 displayed?		 Go to Step 5  Go to Step 8 
5
  1. Estimate the failure of lockup solenoid, lockup clutch or internal valve body.
  2. Inspect the lockup solenoid. Refer to 1, 2 Shift Solenoid, Timing Solenoid, and Lock-Up Solenoid Inspection .
Is the condition of lockup solenoid OK?		 Go to Step 6  Go to Step 9 
6 Estimate the failure of lockup clutch or internal valve body.
Is a condition found?		 Go to Step 10  System OK
7 Repair the temporary connection failure of the connector. Refer to Wiring Harness and Connector Inspection Diagnosis .
Did you complete the repair?		 System OK -
8 Replace the TCM. Refer to Transmission Control Module Replacement .
Did you complete the replacement?		 System OK -
9 Replace the lock-up solenoid. Refer to 1, 2 Shift Solenoid, Timing Solenoid, and Lock-Up Solenoid Inspection .
Did you complete the replacement?		 System OK -
10 Replace the valve body assembly. Refer to Control Valve Body Disassemble .
Did you complete the replacement?		 System OK -
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