P0934 ошибка jeep

For a complete wiring diagram Refer to Section 8W.

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 psi) during shifts and in Park and Neutral
to ensure consistent shift quality.

The monitored Line Pressure Sensor voltage should always be between 0.35 and 4.75 volts. Any monitored voltages outside these parameters indicate an Line Pressure Sensor or wiring problem and
will cause either DTC P0934 or P0935 to set.

• When Monitored:

  Continuously with the ignition on and engine running.

• Set Condition:

  This DTC will set when the monitored Line Pressure Sensor voltage is less than or equal to 0.35 volts for 0.18 seconds.

Always perform the 45RFE/545RFE Pre-Diagnostic Troubleshooting Procedure before proceeding.

(Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC
— 45RFE/545RFE — STANDARD PROCEDURE)

Diagnostic Test

1.CHECK IF DTC IS CURRENT

NOTE:
This counter only applies to the last DTC set.

Is the STARTS SINCE SET counter 2 or less?

Yes

• Go To 2

No

• Go To 7

2.CHECK PCM AND WIRING

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.

NOTE:
The readings should be within ±14 kPa (2.0 psi) on the scan tool to the pressure readings specified on Transmission Simulator.

Does the Line Pressure on the scan tool match the line pressures on the Transmission Simulator?

Yes

• Replace the Line Pressure Sensor per the Service Information.
• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD PROCEDURE)

No

• Go To 3

3.CHECK THE (T38) LINE PRESSURE SENSOR SIGNAL CIRCUIT FOR A SHORT TO GROUND

CAUTION:
Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install Miller
tool #8815 to perform diagnosis.

Is the resistance below 5.0 ohms?

Yes

• Repair the (T38) Line Pressure Sensor Signal circuit for a short to ground.
• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD PROCEDURE)

No

• Go To 4

4.CHECK THE (T38) LINE PRESSURE SENSOR SIGNAL CIRCUIT FOR AN OPEN

Is the resistance above 5.0 ohms?

Yes

• Repair the (T38) Line Pressure Sensor Signal circuit for an open.
• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST — VER 1.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD
  PROCEDURE)

No

• Go To 5

5.CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR AN OPEN

Is the resistance below 5.0 ohms?

Yes

• Repair the (F856) 5-volt Supply circuit for an open.
• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD PROCEDURE)

No

• Go To 6

6.CHECK THE (F856) 5-VOLT SUPPLY CIRCUIT FOR A SHORT TO GROUND

Is the resistance below 5.0 ohms?

Yes

• Repair the (F856) 5-volt Supply circuit for a short to ground.
• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD PROCEDURE)

No

• 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 and program the PCM per the Service Information. With the scan tool, perform QUICK LEARN.

• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD PROCEDURE)

7.CHECK WIRING AND CONNECTORS

Where there any problems found?

Yes

• Repair as necessary.
• Perform 45RFE/545RFE TRANSMISSION VERIFICATION TEST.

  (Refer to 21 — TRANSMISSION/TRANSAXLE/AUTOMATIC — 45RFE/545RFE — STANDARD PROCEDURE)

No

• Test Complete.