P0932
P0932-LINE PRESSURE SENSOR CIRCUITWiring Diagram:
- When Monitored:
Continuously with the ignition on, engine running, with the transmission in gear.
- Set Condition:
The PCM continuously monitors Actual Line Pressure and compares it to Desired Line Pressure. If the Actual Line Pressure reading is more than 172.4 kPa (25 psi) higher than the Desired Line Pressure, but is less than the highest Line Pressure ever used in the current gear, the DTC sets.
Possible Causes
RELATED DTC'S PRESENT
LINE PRESSURE CONNECTOR AND WIRING
INTERNAL TRANSMISSION
POWERTRAIN CONTROL MODULE
Always perform the Pre-Diagnostic Trouble shooting procedure before proceeding. Testing and Inspection
Theory of Operation
Line pressure is electronically controlled by the Transmission Control System and is measured by the Line Pressure Sensor (LPS). The desired line pressure is continuously being compared to the actual line pressure and is regulated by electronically changing the duty cycle of the Pressure Control Solenoid (PCS). (5% duty cycle = solenoid off max line pressure, 62% duty cycle = solenoid on = min line pressure).
The Transmission Control System calculates the desired line pressure based on inputs from the transmission and engine. A calculated torque input to the transmission is used as the primary input of the desired line pressure calculation and is called Torque Based Line Pressure. In addition, the line pressure is set to a preset level 827 to 931 kPa (120 to 135) during shifts and in Park and Neutral to ensure consistent shift quality.
Diagnostic Test
1. CHECK FOR RELATED DTCS
With the scan tool, check for other transmission DTCs.
Are there any other line pressure related DTC's present?
Yes >> Refer to Trouble Code Diagnostic Charts and perform the appropriate test. Perform the test for P0934 and/or P0935 first if present. P0934 P0935
No >> Go To 2
2. CONDITION P0932 PRESENT
CAUTION: Apply Parking Brake
Start the engine.
CAUTION: Firmly apply the brakes.
With the scan tool, monitor the Line Pressure, Desired Line Pressure and the TPS degrees.
While firmly applying the brakes, place the shifter in reverse, then slowly press the accelerator pedal to a TPS degree of 150.
Compare the Line Pressure reading to the Desired Line Pressure reading on the scan tool.
Does the Line Pressure stay within � 34 kPa or 5 of the Desired Line Pressure?
No >> Go To 3
Yes >> Go To 5
3. CHECK LINE PRESSURE CONNECTOR AND WIRING
Ignition on, engine not running.
With the scan tool, 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 4
No >> Disconnect and properly reconnect the Line Pressure Sensor connector. Inspect terminals and repair as necessary Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests
4. CHECK PCM AND WIRING
Turn the ignition off to the lock position. Remove the Starter Relay.
CAUTION: Removal of the Starter Relay will prevent the vehicle from being started in gear.
WARNING: The Starter Relay must be removed from the PDC. Failure to do so can result in personal injury or death.
NOTE: Failure to remove the Starter Relay can cause a Transmission - No Response condition.
Install the 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 scan tool, monitor the Line Pressure during the following step. With the Transmission Simulator, turn the selector switch to each of the 3 Line Pressure positions.
NOTE: All three scan tool Line Pressure readings should be steady and �14 kPa or 2.0 of the reading specified on the Transmission Simulator.
Does the Line Pressure on the scan tool fluctuate up and down more than 69 kPa or 10 at any of the 3 line pressure positions on the Transmission Simulator?
Yes >> Using the schematics as a guide, check the Powertrain Control Module (PCM) terminals for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the PCM. With the scan tool, perform QUICK LEARN. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests
No >> Repair internal transmission and inspect the oil pump and replace if necessary If no problems are found, replace the Transmission Solenoid/TRS Assembly - possible cause is the Pressure Control Solenoid is stuck. Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST - VER 1. Verification Tests
5. CHECK WIRING AND CONNECTORS
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 shorted and open circuits. With the scan tool, check the 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. Verification Tests
No >> Test Complete.