LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2002 >> Blazer 4D Utility, 4WD, Part Time >> Repair and Diagnosis >> External Pages >> Different car >> Section 1861 (Automatic Transmission - 5AT - DTC P0218 To DTC P0761) >> DTC P0712 >> 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. 2:  This step verifies DTC P0712, by indicating a short to ground. If the scan tool does not display a transmission fluid temperature equal to or greater than 159°C (318°F), then the DTC is intermittent.
  2. 3:  This step isolates the PCM and the engine wiring harness. If the scan tool displays a transmission fluid temperature less than -29°C (-20°F), then the PCM and the engine wiring harness are not damaged.
DTC P0712

Step Action Values Yes No
1 Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle
  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 Failure Records. Using the Clear Info function erases the Failure Records from the PCM.
  4. Record the DTC Failure Records.
  5. Clear the DTC.
  6. Select Trans. Fluid Temp. on scan tool.
Does the scan tool display a Trans. Fluid Temp. less than the specified value?
159°C (318°F) Go to Testing for Intermittent Conditions and Poor Connections Go to Step 3 
  1. Turn OFF the ignition.
  2. Disconnect the TFT sensor. Additional DTCs may set.
  3. Turn ON the ignition, with the engine OFF.
Does the scan tool display a Trans. Fluid Temp. less than the specified value?
-29°C (-20°F) Go to Step 5  Go to Step 4 
4 Test the TFT sensor signal circuit for a short to ground. Refer to Testing for Short to Ground and Wiring Repairs .
Did you find and correct the condition?
- Go to Step 7  Go to Step 6 
5 Replace the TFT sensor. Refer to Transmission Fluid Temperature Sensor Replacement .
Did you complete the replacement?
- Go to Step 7  -
6 Replace the PCM. Refer to Control Module References for replacement, setup, and programming.
Did you complete the replacement?
- Go to Step 7  -
7 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:
    • Turn ON the ignition with the engine OFF.
    • The Trans. Fluid Temp. must be between -20 and +110°C (-4 and +230°F) for 10 seconds.
  4. Select Specific DTC.
  5. Enter DTC P0712.

Has the test run and passed?
- Go to Step 8  Go to Step 2 
8 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