Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Jeep Liberty. However, it is still accessible from the selected car via links, so may be relevant.

DIAGNOSTIC TEST REFERENCE - P0932-LINE PRESSURE SENSOR CIRCUIT FAULT

TEST	ACTION	APPLICABILITY
1	NOTE: Low fluid level can be the cause of many transmission problems. If the fluid level is low locate and repair the leak then check and adjust the fluid level per the Service Information. NOTE: Always perform diagnostics with a fully charged battery to avoid false symptoms. With the DRBIII®, read the engine DTC's. Check and repair all engine DTC's prior to performing transmission symptom diagnostics.With the DRBIII®, read Transmission DTC's. Record all DTC's and 1 Trip Failures. NOTE: Diagnose 1 Trip Failures as a fully matured DTC. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.Repair as necessary.Perform the Shift Lever Position Test. If the test does not pass, refer to Symptom test for P0706 CHECK SHIFTER SIGNAL .For Gear Ratio DTC's, check and record all CVI's.Most DTC's set on start up but some must be set by driving the vehicle such that all diagnostic monitors have run. NOTE: Verify the flash level of the transmission controller. Some problems are corrected by software upgrades to the transmission controller. NOTE: Check for applicable TSB's related to the problem. Perform this procedure prior to Symptom diagnosis.ContinueGo To 2	All
2	With the DRBIII®, check for other transmission DTC's. Are there any other line pressure related DTC's P0934, P0935, P0868, or P0869 present? Yes --> Refer to the TRANSMISSION CATEGORY and perform the appropriate symptom. If the DTC P0934 and/or P0935 are present, perform these tests first. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 . No --> Go To 3	All
3	CAUTION: Apply Parking Brake Start the engine. CAUTION: Firmly apply the brakes. With the DRBIII®, monitor the Line Pressure, Desired Line Pressure and the TPS Degree.While firmly applying the brakes place shifter in the R position. Then slowly press the accelerator pedal to a TPS degree of 15.Compare the Line Pressure reading to the Desired Line Pressure reading on the DRBIII®.Does the Line Pressure and Desired Line Pressure stay within +/- 34 kPa or 5 PSI?No --> Go To 4Yes --> Go To 8	All
4	With the DRBIII®, monitor the Line Pressure Sensor voltage while wiggling the wiring harness and connectors pertaining to the Line Pressure Sensor and the Transmission Solenoid/TRS Assembly. Did the voltage remain steady while wiggling the wiring harness and connectors? Yes --> Go To 5 No --> Repair as necessary. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .	All
5	Turn the ignition off to the lock position. Remove the Starter Relay. NOTE: Failure to remove the Starter Relay can cause a Transmission - No Response condition. Install Transmission Simulator Miller tool #8333. With the Transmission Simulator select the "OFF" position on the "Input/Output Speed" switch. Ignition on, engine not running. With the DRBIII®, monitor the Line Pressure during the following step. Using the Transmission Simulator, turn the selector switch to each of the 3 Line Pressure positions. NOTE: All three DRBIII® Line Pressure readings should be steady and +/- 2.0 PSI of the reading specified on the Transmission Simulator. Does the Line Pressure fluctuate up and down more than 69 kPa or 10 PSI at any of the positions? Yes --> Go To 6 No --> Go To 7	All
6	Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits. If there are no possible causes remaining, view repair. Repair Replace the Transmission Control Module per the Service Information. WITH THE DRBIII® PERFORM QUICK LEARN . Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .	All
7	If there are no possible causes remaining, view repair. Repair Repair internal transmission per the Service Information. inspect the Oil Pump and replace if necessary per Service Information. If no problem is found, replace the Transmission Solenoid/TRS Assembly for a stuck Pressure Control Solenoid. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 .	All
8	The conditions necessary to set this DTC are not present at this time. Using the schematics as a guide, inspect the wiring and connectors specific to this circuit. Wiggle the wires while checking for shorts and open circuits. With the DRBIII®, check the EATX DTC EVENT DATA to help identify the conditions in which the DTC was set. Where there any problems found? Yes --> Repair as necessary. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1 . No --> Test Complete.	All