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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1466 (Automatic Transmission, 4L60-E/4L65-E Diagnosis (DTC P0218 To DTC P0748 - 4.2L)) >> Diagnostic Information and Procedures >> DTC P0741 (4.2L) >> Test Description

Test Description

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The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step inspects for excessive TCC slip when the TCC is commanded ON.
  2. 3:  This step inspects for possible causes of no TCC apply.
DTC P0741 (4.2L)

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-4.2L
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 Freeze Frame and Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the PCM.
  3. Record the DTC Freeze Frame and Failure Records.
  4. Clear the DTC.
  5. Drive the vehicle in the D4 drive range in second, third or fourth gear under steady acceleration, with a TP angle at 20-99%.
While the scan tool TCC Enable is Yes, does the scan tool display a TCC Slip Speed greater than the specified range?		 130 RPM Go to Step 3  Go to Intermittent Conditions in Engine Controls - 4.2L
3  The TCC is hydraulically or mechanically stuck OFF. Inspect for the following conditions:
  • Inspect the TCC PWM valve for a damaged exhaust orifice.
  • Inspect for the converter apply valve being stuck in the OFF, release, position.
  • Inspect for a misaligned or damaged valve body gasket.
  • Inspect for a restricted apply valve passage.
  • Inspect the torque converter clutch for being mechanically stuck OFF.

Refer to Symptoms - Automatic Transmission NO TCC apply.
Was the condition found?		 - Go to Step 4  -
4 Perform the following procedure in order to verify the repair:
Drive the vehicle in D3 under the following conditions:
Hold the throttle at 20-99% and accelerate to 88 km/h (55 mph). Ensure that the TCC is commanded ON and the TCC Slip Speed is less than 50 RPM for 10 seconds.
Has the TCC Slip Speed been less than 50 RPM for 10 seconds?		 - Go to Step 5  Go to Step 2 
5 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 - 4.2L System OK
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