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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 29 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - DTC P0218 To DTC P0785) >> DTC P0741 >> Test Description

Test Description

WARNING: This page is about a different variant/trim than selected.

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

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
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 Testing for Intermittent Conditions and Poor Connections
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 System Diagnosis NO TCC apply.
Was the condition found?		 - Go to Step 4  -
4 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Drive the vehicle in D4 under the following conditions:

    Hold the throttle at 20-99% and accelerate to 88 km/h (55 mph). Ensure that the scan tool TCC Slip Speed is less than 50 RPM for 5 seconds, with the TCC ON.

  4. Select Specific DTC.
  5. Enter DTC P0741.

Has the test run and passed?		 - 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 - Vehicle System OK
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