LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 2005 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 207 (Automatic Transmission - 5L40-E/5L50-E - (DTC P0115 To DTC P0756)) >> DTC P0741 >> Test Description

Test Description

WARNING: This page is about a different car, the 2005 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

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

  1. 2:  This step inspects the transmission fluid to ensure that it is at the proper level.
  2. 3:  This step verifies that the TCC engages when commanded ON by the scan tool.
DTC P0741

Step Action Value(s) Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2  Perform the Transmission Fluid Checking Procedure. Refer to Transmission Fluid Checking Procedure .
Did you perform the Transmission Fluid Checking Procedure?		 - Go to Step 3  Go to Transmission Fluid Checking Procedure
3 
  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 Freeze Frame and Failure Records.
  4. Clear the DTC.
  5. Operate the vehicle in D at 72 km/h (45 mph).
  6. Using the scan tool, command the TCC PWM solenoid valve ON.
  7. Monitor the TCC slip speed on the scan tool.
Is the slip speed within the specified range?		 -20 to +75 RPM Go to Intermittent Conditions in Engine Controls - 3.6L or Intermittent Conditions in Engine Controls - 4.6L Go to Step 4 
4
  • Inspect the front control valve body assembly (311) for the following conditions:
  • Inspect the rear control valve body assembly (310) for the control valve body ball check valve #2 stuck or missing. Refer to Control Valve Body Accumulator Assembly Replacement .
  • Inspect the fluid pump assembly (202) for the following conditions:
    • TCC control valve (235) stuck in the off position
    • TCC enable valve (237) stuck in the off position. Refer to Fluid Pump Disassemble and Fluid Pump Assemble in Transmission Overhaul article.
  • Inspect the forward clutch input housing assembly (433) for the input shaft fluid seal ring (432) leaking or worn. Refer to Forward and Coast Clutch Disassemble in Transmission Overhaul article.
Did you find and correct any of the above conditions?		 - Go to Step 5  -
5 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Operate the vehicle under the following conditions:
    • The TFT is 20-130°C (68-266°F).
    • The engine torque is greater than 55 N.m (41 lb ft).
    • Drive the vehicle in D with the throttle position at 12-90 percent.
    • Ensure that the TCC applies and the slip speed is -20 to +75 RPM for 4 seconds.
  4. Select Specific DTC.
  5. Enter DTC P0741.

Has the test run and passed?		 - Go to Step 6  Go to Step 2 
6 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 in Vehicle DTC Information System OK
scientia non olet · About LEMON Manuals