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Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1871 (Automatic Transaxle - 4T45-E - DTC P2761 To DTC P2797) >> DTC P2797 (2.4L Hybrid) >> Test Description

Test Description

WARNING: This page is about a different car, the 2007 Saturn Vue. 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. 3:  This step verifies if the auxiliary transmission fluid pump is operational. A stethoscope may be necessary to hear pump running.
  2. 4:  This step tests for the auxiliary transmission fluid pump pressure.
DTC P2797

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 Inspect for correct transmission fluid level.
Refer to Transmission Fluid Checking .
Did you perform the fluid checking procedure?
- Go to Step 3  -
  1. Turn ON the ignition, with the engine OFF.
  2. With a scan tool, select Transmission Control Module DTC Information.
Are there any Transmission Fluid Pressure DTCs set?
- Go to Diagnostic Trouble Code (DTC) List - Vehicle Go to Step 4 
  1. Turn OFF the ignition.
  2. Install the transmission fluid PSI gage at the case tap.
  3. Turn ON the ignition, with the engine OFF.
  4. Command the auxiliary transmission fluid pump relay ON with a scan tool.
Is the pressure above the specified value?
16 PSI Go to Step 7  Go to Step 5 
5 Inspect the auxiliary transmission fluid pump for a restricted filter, loose mounting bolts, or damage.
Did you find and correct the condition?
- Go to Step 8  Go to Step 6 
6 Replace the auxiliary transmission fluid pump. Refer to Transmission Fluid Auxiliary Pump Replacement .
Did you complete the replacement?
- Go to Step 8  -
7 Replace the TFP manual valve position switch.
Refer to Transmission Fluid Pressure Manual Valve Position Switch Replacement .
Did you complete the replacement?
- Go to Step 8  -
8 Perform the following procedure in order to verify the repair:
  1. Select DTC.
  2. Select Clear Info.
  3. Operate the vehicle under the following condition:

    Operate the vehicle in engine idle off mode and verify the auxiliary transmission fluid pump is on.

  4. Select Specific DTC.
  5. Enter DTC P2797.

Has the DTC run and passed?
- Go to Step 9  Go to Step 2 
9 With a 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