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Test Description

WARNING: This page is about a different variant/trim than selected.

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

  1. 1:  The Diagnostic System Check - Vehicle, prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
  2. 3:  This step inspects the condition of the solenoid and the internal electrical harness for damage.
  3. 4:  This step inspects for an open or short in the 2ND brake control circuit.
DTC P1790

Step Action Value(s) Yes No
Schematic Reference: Automatic Transmission Controls Schematics 
1  Did you perform the Diagnostic System Check - Vehicle? - Go to Step 2  Go to Diagnostic System Check - Vehicle in Vehicle DTC Information
2
  1. Install a scan tool.
  2. Turn the ignition ON, with the engine OFF.
  3. Perform the scan tool Clear DTC Information function.
  4. Operate the vehicle within the Freeze Frame conditions as observed.
Does the scan tool display any other DTCs in addition to DTC P1790?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information Go to Step 3 
3 
  1. Disconnect the transaxle connector.
  2. Use the DMM in order to measure the resistance between the ground and the transaxle connector terminal 2.
Is the resistance within the specified value?		 11-15 Ω at 20°C (68°F) Go to Step 4  Go to Step 5 
4 
  1. Connect the transaxle connector.
  2. Disconnect the powertrain control module (PCM) C2 connector.
  3. Use the DMM in order to measure the resistance between ground and the PCM C2 connector terminal 12.
Is the resistance within the specified value?		 11-15 Ω at 20°C (68°F) Go to Step 6  Go to Step 7 
5
  1. Remove the transaxle oil pan.
  2. Inspect the terminals and the internal harness for damage.
  3. If the terminals and the internal harness are not damaged, replace the solenoid.
Is the action complete?		 - Go to Step 8  -
6 Replace the PCM. Refer to Powertrain Control Module Programming and Setup in Programming and Setup.
Is the repair complete?		 - Go to Step 8  -
7 Repair the short, open, or high resistance in the 2ND brake control solenoid circuit.
Is the action complete?		 - Go to Step 8  -
8
  1. Turn the ignition switch to LOCK.
  2. Reconnect the connectors.
  3. Perform the DTC Confirmation Procedure.
Are any DTCs displayed on the scan tool?		 - Go to Diagnostic Trouble Code (DTC) List - Vehicle in Vehicle DTC Information System OK
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