LEMON Manuals: Even more car manuals for everyone
Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 64 (Automatic Transaxle - 4T80-E - DTC P0218 To DTC P0977) >> DTC P0741 >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Cadillac DTS. 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 Values Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
2  Did you perform the Transmission Fluid Checking Procedure? - Go to Step 3  Go to Transmission Fluid Checking
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 Freeze Frame and Failure Records. Using the Clear Info function erases the Freeze Frame and Failure Records from the TCM.
  3. Record the DTC Freeze Frame and Failure Records.
  4. Clear the DTC.
  5. Drive the vehicle at 72 km/h (45 mph).
  6. Using the scan tool, command the TCC PWM solenoid valve ON.
  7. Operate the vehicle under the following conditions:
    • The transmission fluid temperature (TFT) is 20-130°C (68-266°F).
    • The engine torque is 50-1492 N.m (37-1100 lb ft).
    • Drive the vehicle in D4 with a throttle position (TP) angle of 2-90 %.
    • Ensure that the TCC applies for more than 5 seconds.
  8. Monitor the TCC slip speed.
During TCC application, is the slip speed within the specified parameters?		 -20 to +100 RPM Go to Diagnostic Aids Go to Step 4 
4
  1. During TCC apply, if NO change in TCC slip speed, inspect for the following conditions:
    • The TCC control valve is stuck OFF due to sediment or binding.
    • The TCC regulator valve is stuck OFF due to sediment or binding.
    • The TCC feed valve is stuck OFF due to sediment or binding.
    • The TCC enable valve is stuck OFF due to sediment or binding.
  2. During TCC apply, if SOME change in TCC slip speed, inspect for the following conditions:
  3. Repair any of the above items as necessary.
  4. If no problems found in previous conditions, replace the T/C viscous clutch.
Did you complete the repair?		 - 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 50-1492 N.m (37-1100 lb ft).
    • Drive the vehicle in D4 with a TP angle of 10-50%.
    • Ensure that the TCC applies and the slip speed is -20 to +55 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 DTC's that you have not diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle System OK
scientia non olet · About LEMON Manuals