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Home >> Isuzu >> 2007 >> i-290 LS, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 67 (Automatic Transaxle - 4T80-E - DTC P01811 To DTC P2764) >> DTC P2763 >> 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 number below refers to the step number on the diagnostic table.

  1. 3:  This step tests the TCM and the wiring to the transmission.
  2. 5:  This step verifies that the circuit has the correct resistance.
DTC P2763

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 TCM Freeze Frame and the 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. Select TCC Duty Cycle Short to Volts parameter on the scan tool.
  6. Drive the vehicle in D4.
When TCC is commanded, does the scan tool display indicate a short to voltage?		 - Go to Step 3  Go to Testing for Intermittent Conditions and Poor Connections
3 
  1. Turn OFF the ignition.
  2. Disconnect the AT inline 20-way connector. Additional DTCs may set.
  3. Install the J 44152  Jumper Harness on the engine side of the AT inline 20-way connector. See Special Tools .
  4. Using the J 35616  GM Terminal Test Kit, connect a test lamp between terminal T of the J 44152  and ground. See Special Tools .

    Refer to Automatic Transmission Inline 20-Way Connector End View .

  5. Turn ON the ignition, with the engine OFF.
Is the test lamp ON?		 - Go to Step 4  Go to Step 5 
4 Test the control circuit of the TCC PWM solenoid valve for a short to voltage between the TCM connector and the AT inline 20-way connector.
Refer to Testing for a Short to Voltage and Wiring Repairs .
Did you find and correct the condition?		 - Go to Step 11  Go to Step 10 
5 
  1. Turn OFF the ignition.
  2. Disconnect the J 44152  from the engine side of the AT inline 20-way connector. See Special Tools .
  3. Install the J 44152  on the transmission side of the AT inline 20-way connector. See Special Tools .
  4. Using the DMM and the J 35616  , measure the resistance between terminals U and T of the J 44152  . See Special Tools .

    Refer to Automatic Transmission Inline 20-Way Connector End View .

Does the resistance measure within the specified range?		 10-25 Ω Go to Step 7  Go to Step 6 
6
  1. Leave the DMM test leads connected.
  2. Disconnect the TCC PWM solenoid valve from the automatic transmission wiring harness.
Does the resistance measure less than the specified value?		 250 K Ω Go to Step 8  Go to Step 9 
7 Measure the resistance between terminal T and all other terminals, except terminal U, of the J 44152  . See Special Tools .
Refer to Automatic Transmission Inline 20-Way Connector End View .
Is the resistance between terminal T and any other terminal, except terminal U, less than the specified value?		 250 K Ω Go to Step 8  Go to Testing for Intermittent Conditions and Poor Connections
8
IMPORTANT: The automatic transmission wiring harness consists of 2 separate harnesses, the Automatic Transmission Wiring Harness Assembly and the Automatic Transmission Wiring Extension Harness Assembly. In order to avoid the unnecessary replacement of parts, determine which harness contains the fault and replace only that harness.
Replace the automatic transmission wiring harness.Refer to Input Speed Sensor and Wiring Harness Removal .Did you complete the replacement?		 - Go to Step 11  -
9 Replace the TCC PWM solenoid valve.
Refer to Upper Control Valve Body Disassemble .
Did you complete the replacement?		 - Go to Step 11  -
10 Replace the TCM.
Refer to Control Module References .
Did you complete the replacement?		 - Go to Step 11  -
11 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:
    • Drive the vehicle in D4.
    • Allow the transmission to obtain a 3-4 upshift.
  4. Select Specific DTC.
  5. Enter DTC P2763.

Has the test run and passed?		 - Go to Step 12  Go to Step 2 
12 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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