P2723
DTC P2723 or P2724
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptors
DTC P2723
- Pressure Control Solenoid Valve 5 Stuck Off
DTC P2724
- Pressure Control Solenoid Valve 5 Stuck On
Circuit/System Description
The clutch pressure control (PC) solenoid 5 is part of the control solenoid valve assembly, which has no serviceable components. The PC solenoid 5 regulates transmission fluid pressure (TFP) to the 1-2-3-4 regulator valve which controls pressure to the 1-2-3-4 clutch. The transmission control module (TCM) calculates gear ratio based on the RPM signals from the input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the expected transmission gear ratio to the calculated gear ratio for each commanded gear.
Conditions for Running the DTC
P2723
* DTC P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401, P042E, P0716, P0717, P0722, P0723, or P182E is not set.
* Ignition voltage is 9.0 volts or greater.
* Throttle position signal is valid.
* Engine speed is 400 RPM or greater for 5 seconds.
* High side driver (HSD) is enabled.
* Transmission fluid temperature (TFT) is -7°C (19°F) or greater.
* Transmission output speed is 650 RPM or greater or the throttle position is 0.5 percent or greater.
P2724
* DTC P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207, P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401, P042E, P0716, P0717, P0722, P0723, or P182E is not set.
* TFT is 0°C (32°F) or greater.
* HSD is ON.
* Transmission output shaft speed is 200 RPM or greater.
* Transmission input shaft speed is 200 RPM or greater.
* Commanded range is not 1st gear.
Conditions for Setting the DTC
P2723
TCM detects an incorrect on-coming clutch gear ratio, or shift flare.
P2724
TCM detects an incorrect off-going clutch gear ratio, or shift tie-up.
Action Taken When the DTC Sets
P2723
* DTC P2723 is a Type A DTC.
* TCM freezes transmission adaptive functions.
* TCM commands maximum line pressure.
* TCM inhibits Tap Up/Tap Down.
* TCM inhibits Manual Up/Manual Down with the gear selector.
* Torque management is enabled.
* TCM limits the transmission to reverse and 5th range.
P2724
* DTC P2724 is a Type A DTC.
* TCM freezes transmission adaptive functions.
* TCM commands maximum line pressure.
* TCM inhibits Tap Up/Tap Down.
* TCM inhibits Manual Up/Manual Down with the gear selector.
* TCM limits the transmission to reverse and 3rd range.
Conditions for Clearing the DIC/DTC
DTCs P2723 and P2724 are Type A DTCs.
Diagnostic Aids
Before performing a road test, configure and setup the scan tool for snapshot mode. This allows you to monitor, display, and verify multiple transmission data parameters at one time, after the road test.
Reference Information
Description and Operation
* Transmission General Description Transmission General Description
* Transmission Component and System Description Transmission Component and System Description
* Electronic Component Description Electronic Component Description
For Hydraulic Schematic reference and description, refer to:
* Drive Range, First Gear (Gen 1) Drive Range, First Gear (Gen 1)
* Drive Range, Second Gear (Gen 1) Drive Range, Second Gear (Gen 1)
* Drive Range, Third Gear (Gen 1) Drive Range, Third Gear (Gen 1)
* Drive Range - Fourth Gear (Gen 1) Drive Range - Fourth Gear (Gen 1)
* Drive Range, Fifth Gear (Gen 1) Drive Range, Fifth Gear (Gen 1)
* Drive Range, Sixth Gear (Gen 1) Drive Range, Sixth Gear (Gen 1)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
Warning: Refer to Parking Brake and Drive Wheels Warning Parking Brake and Drive Wheels Warning.
Note: If other DTCs are set, diagnose those DTCs first.
1. Engine idling in Park, with parking brake applied and drive wheels chocked.
2. Verify the transmission fluid level and condition is correct. Refer to Transmission Fluid Level and Condition Check Testing and Inspection.
3. Verify the scan tool Transmission Fluid Pressure Switch 4 parameter displays the correct state for each gear range while placing the gear select lever in Park, Reverse, and Neutral range. Refer to Transmission Fluid Pressure Switch Logic Transmission Fluid Pressure Switch Logic.
• If the correct state for each gear range is not displayed
Refer to Circuit/System Testing.
• If the correct state for each gear range is displayed
4. Gear select lever in Drive range.
5. Verify the scan tool Transmission Fluid Pressure Switch 4 parameter state displays the correct state for each gear range while commanding the scan tool Shift Transmission Gear through all forward ranges. Refer to Transmission Fluid Pressure Switch Logic Transmission Fluid Pressure Switch Logic.
• If the correct state for each gear range is not displayed
Refer to Circuit/System Testing.
• If the correct state for each gear range is displayed
6. Ignition ON, engine OFF. Clear the TCM DTC information with a scan tool.
7. Perform the Road Test Initial Inspection and Diagnostic Overview.
8. Verify DTC P2723 or P2724 did not set.
• If a DTC set
Refer to Circuit/System Testing.
• If a DTC does not set
9. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
10. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
11. All OK.
Circuit/System Testing
Note: You must perform the Circuit/System Verification first.
1. Verify the transmission line pressures are within range. Refer to Line Pressure Check Line Pressure Check and Solenoid Valve Pressure (Gen 1) Solenoid Valve Pressure (Gen 1).
• If line pressures are not within the specified ranges
Refer to Fluid Pressure High or Low Fluid Pressure High or Low.
• If line pressures are within the specified ranges
2. Engine Idling, shift selector in the Drive position.
3. Verify the scan tool parameters listed below display the correct state for each gear range while commanding the scan tool Shift Transmission Gear through all forward ranges. Refer to Transmission Fluid Pressure Switch Logic Transmission Fluid Pressure Switch Logic for the correct gear range states.
* Transmission Fluid Pressure Switch 1
* Transmission Fluid Pressure Switch 3
* Transmission Fluid Pressure Switch 4
* Transmission Fluid Pressure Switch 5
• If the correct state for each gear range is not displayed
Replace the Q8 control solenoid valve assembly.
1. Ignition OFF.
2. Remove the Control Valve Body. Refer to Control Valve Body Replacement Control Valve Body Replacement.
3. Verify the Control Valve Body is not contaminated with any debris and there is no damage or sticking valves, refer to Control Valve Body Cleaning and Inspection (Gen 1) 44. Control Valve Body Cleaning and Inspection (Gen 1).
• If there is contamination, damage, or sticking valves, repair or replace the control valve body as necessary.
• If there is no contamination, damage, or sticking valves, replace the Q8 Control Solenoid Valve Assembly.
• If the correct state for each gear range is displayed
4. Verify the conditions listed below do not exist. Carefully inspect each component for that condition. Repair or replace as necessary.
P2723 - Automatic Transmission Fluid Filter Assembly
Oil filter or filter seal loose or damaged.
P2723 - Torque Converter (w/Fluid Pump) Housing Assembly
* Fluid pump housing/gear damaged/scored.
* Fluid pump or torque converter overstressed due to high temperatures.
P2723 - Trans Case and 1-2-3-4 Clutch Backing Plate Retaining Ring
1-2-3-4 clutch backing plate retaining ring not seated/oriented, causing clutch pack/piston over travel.
P2723 - Output Sun Gear Assembly
Housing/hub weld cracked/leaking.
P2723 - Lo and Reverse and 1-2-3-4 Clutch Housing Assembly (51)
1-2-3-4 clutch piston (414) cracked/damaged/leaking.
P2723 - Channel Plate and Spacer Plate
Oil channels or orifices blocked by debris.
P2723 or P2724 - Control Valve Body Assembly
1-2-3-4 clutch regulator valve stuck/sticking - debris, binding, damaged valve, or scored bore.
P2723 or P2724 - Q8 Control Solenoid Valve Assembly (314)
* Pressure Control Solenoid Valve 5 Stuck ON/OFF.
* O-ring seals leaking.
* Valve body filter plate assembly cracked, blocked, or damage gasket seal.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Note: Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
* Refer to Control Module References Programming and Relearning for control solenoid valve assembly replacement, setup, and programming.
* Perform the Transmission Adaptive Values Learn Programming and Relearning following all transmission related repairs.
* Perform the:
- Internal Components Removal 8. Internal Components Removal
- Low and Reverse and 1-2-3-4 Clutch Housing Disassemble 26. Low and Reverse and 1-2-3-4 Clutch Housing Disassemble
- Low and Reverse and 1-2-3-4 Clutch Housing Cleaning and Inspection 27. Low and Reverse and 1-2-3-4 Clutch Housing Cleaning and Inspection
- Low and Reverse and 1-2-3-4 Clutch Housing Assemble 28. Low and Reverse and 1-2-3-4 Clutch Housing Assemble
- Low and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate Installation (6T40/45/50) 29. Low and Reverse and 1-2-3-4 Clutch Housing, and 1-2-3-4 Clutch Plate Installation (6T40/45/50)