DTC P2723 or P2724

Diagnostic Instructions

 

     

Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

 

     

Review Strategy Based Diagnosis for an overview of the diagnostic approach.

 

     

Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P2723:  Clutch Pressure Control (PC) Solenoid 5 - Stuck Off

DTC P2724:  Clutch Pressure Control (PC) Solenoid 5 - Stuck On

Diagnostic Fault Information

 

The following fault table will help determine if a hydraulic circuit or an incorrect position of a valve train component affects the transmission operation.

Component

Cause

DTCs

1-2-3-4 and 3-5-R Clutch Housing Assembly

1-2-3-4 clutch backing plate retaining ring not seated, causing the piston to over-travel and cut 1-2-3-4 clutch piston seal

P2723

Lower Control Valve Body Assembly

Clutch select valve 3 stuck OFF - debris, sediment, binding or scored bore

P2723

Upper Control Valve Body Assembly

1-2-3-4 Clutch regulator valve stuck - debris, sediment, binding or scored bore

P2723

Fluid Pump Cover Assembly

     

Fluid pump cover pump damage or debris between torque converter housing causing pump slide damage

 

     

Fluid pump cover vanes and fluid pump rotor broken

P2723

Circuit/System Description

 

The clutch pressure control (PC) solenoid 5 is integral to the control solenoid (w/body and TCM) valve assembly and has no serviceable parts. The PC solenoid 5 is a normally high-pressure control solenoid which provides fluid pressure to the 1-2-3-4 clutch regulator valve. The TCM controls the solenoid pressure by regulating the exhaust fluid. When the TCM commands the solenoid off, the exhausting fluid is stopped and the 1-2-3-4 pressure is high. When commanded on, the clutch PC solenoid 5 regulates the amount of exhausting transmission fluid. Solenoid power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuits and components that the TCM powers. Should the circuit overload the driver will shutdown. After the overload is removed the HSD reset.

Conditions for Running the DTC

 

P2723

     

No DTCs P0716 or P0717.

 

     

No DTCs P0722 or P0723.

 

     

No DTCs P1825 or P1915.

 

     

The transmission input shaft speed is greater than 60 RPM.

 

     

1-2-3-4 clutch is commanded ON.

P2724

     

No DTCs P0716 or P0717.

 

     

No DTCs P0722 or P0723.

 

     

No DTCs P1825 or P1915.

 

     

The transmission input speed is equal to or greater than 200 RPM.

 

     

The transmission output shaft speed is equal to or greater than 200 RPM.

 

     

1-2-3-4 clutch is commanded OFF.

Conditions for Setting the DTC

 

P2723

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 1-2-3-4 clutch is commanded ON for 0.5 seconds and either fail case below is achieved:

Fail Case 1

     

Output shaft speed is greater than 60 RPM.

 

     

The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

Fail Case 2

     

Output shaft speed is less than 60 RPM.

 

     

The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

P2724

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 1-2-3-4 clutch is commanded OFF for 0.5 seconds and the following is achieved:

     

The 1-2-3-4 clutch commanded pressure is 0 kPa for a calculated amount of time.

 

     

The transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

 

     

The output shaft speed is greater than 60 RPM.

Action Taken When the DTC Sets

 

     

DTCs P2723 and P2724 are Type A DTCs.

 

     

The TCM freezes transmission adaptive functions.

 

     

DTC P2723 defaults to Reverse, Park, Neutral, 5th, or 6th gear.

 

     

DTC P2724 defaults to Reverse, Park, Neutral, 1st, or 2nd gear.

Conditions for Clearing the DIC/DTC

 

DTCs P2723 and P2724 are Type A DTCs.

Diagnostic Aids

 

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Reference Information

 

Schematic Reference

     

Drive Range, First Gear

 

     

Drive Range, Second Gear

 

     

Drive Range, Third Gear

 

     

Drive Range - Fourth Gear

 

     

Drive Range, Fifth Gear

 

     

Drive Range, Sixth Gear

Connector End View Reference

Component Connector End Views

Electrical Information Reference

     

Circuit Testing

 

     

Connector Repairs

 

     

Testing for Intermittent Conditions and Poor Connections

 

     

Wiring Repairs

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References for scan tool information

Special Tools

     

DT-47825 Control Solenoid Test Plate

 

     

DT-47825-10 Jumper Harness

Circuit/System Verification

 

  1. Perform the Transmission Fluid Check .
  2. Turn ON the ignition, with the engine OFF.

Important: Before clearing the DTC, use the scan tool in order to record the Freeze Frame and Failure Records.

  1. Record the DTC Freeze Frame and Failure Records.
  2. Clear the DTC.
  3. Operate the vehicle in drive with the calculated throttle position greater than 15 percent to obtain 72 km/h (45 mph) and achieve 5th gear. Perform this maneuver 2 times.

If the DTC resets, go to Circuit/System Testing.

Circuit/System Testing

 

  1. Perform the Line Pressure Check .

If the pressure is out of specification, correct this concern first.

  1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest the DTC as outlined in the Circuit/System Verification steps.

If the DTC resets, continue on with testing.

  1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

  1. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .

If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.

  1. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris.

If a concern if found in the valve body, repair or replace the valve body as necessary.

  1. Inspect the 1-2-3-4 clutch assembly for damage.

If a concern is found in the 1-2-3-4 clutch assembly, repair or replace as necessary.

Component Testing

 

Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

PC Sol 5 Operation

Operating Conditions

Normal Operation

Stuck OFF

Stuck ON

Steady State Gears 1, 2, 3, 4

1, 2, 3, 4

Neutral

1, 2, 3, 4

Steady State Gears 5, 6

5, 6

5, 6

1, 2, 3, 4

Garage Shift

Park/Neutral/Reverse to Drive

Neutral

Drive Gear

Downshift from gears 5, 6 to 1, 2, 3, 4

1, 2, 3, 4

Neutral

1, 2, 3, 4

Upshift from gears 1, 2, 3, 4 to 5, 6

5, 6

5, 6

1, 2, 3, 4

Repair Instructions

 

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

     

Control valve body replacement. Refer to Control Valve Lower Body and Upper Body Replacement .

 

     

Control solenoid (w/body and TCM) valve assembly replacement. Refer to Control Module References for replacement, setup, and programming.

 

     

1-2-3-4 clutch assembly repair or replace. Refer to 1-2-3-4 and 3-5 Reverse Clutch Overhaul .

 

     

Perform the Service Fast Learn Adapts if internal transmission repairs are performed.