P0755
DTC P0755
Circuit Description
The powertrain control module (PCM) uses signals from the vehicle speed sensor (VSS) to detect the actual gear position. The PCM then compares the actual gear with the shift schedule in the PCM memory to detect mechanical trouble of the shift solenoid #2.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC P0755 Shift Solenoid 2 Performance or Stuck Off
Conditions for Setting the DTC
DTC P0755 will set when the following conditions are met:
^ The gear required by the PCM does not match the actual gear.
^ Two driving cycle detection logic
Action Taken When the DTC Sets
A DTC P0755 is stored and the malfunction indicator lamp (MIL) is turned ON.
Diagnostic Aids
Inspect for the following conditions:
^ Shift select cable out of adjustment
^ Clogged or leaky shift solenoid #2
^ Transaxle mechanical malfunction
^ Valve body fluid passage clogged
^ A faulty PCM
An intermittent may be caused by the following conditions:
^ A poor connection
^ Rubbed through wire insulation
^ A broken wire inside the insulation
Perform the following steps if DTC P0755 cannot be duplicated:
1. Read the information in the freeze frame data.
2. Use the data to determine the vehicle operating conditions when the DTC was set.
DTC Confirmation Procedure
1. Turn the ignition switch to LOCK.
2. Connect the scan tool to data link connector (DLC).
3. Turn the ignition switch to ON.
4. Use a scan tool to clear the following items from the PCM memory:
^ The DTC
^ The pending DTC
^ Freeze frame data
5. Start the engine and warm up to normal operating temperature.
6. Accelerate the vehicle in Drive (D) range and test for upshifting from 1st, to 2nd, to 3rd, and to 4th/Overdrive gears as vehicle speed increases.
7. Stop the vehicle.
8. Use the Scan Tool to inspect for DTC P0755.
Test Description
The numbers below refer to the step numbers on the diagnostic table.
1. The Powertrain OBD System Check 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.
3. This step checks for proper shift points.
5. This step checks for a leaky shift solenoid #2.
6. This step checks for a stuck closed shift solenoid #2.
8. This step checks the condition of the valve body assembly.
9. This step checks for a faulty PCM.
