DTC P2723 or P2724
Diagnostic Instructions
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. |
• |
The ignition voltage is 9.0 volts or
greater. |
• |
The throttle position signal is valid. |
• |
The engine speed is 400 RPM or greater for
5 seconds. |
• |
The high side driver (HSD) is enabled. |
• |
The transmission fluid temperature (TFT) is
-7°C (19°F) or greater. |
• |
The 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. |
• |
The TFT is 0°C (32°F) or greater. |
• |
The transmission output shaft speed is
200 RPM or greater. |
• |
The transmission input shaft speed is 200 RPM
or greater. |
• |
The commanded range is not 1st gear. |
Conditions for Setting the DTC
P2723
The TCM detects an incorrect on-coming clutch gear ratio, or
shift flare.
P2724
The 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. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM commands maximum line pressure. |
• |
The TCM inhibits Tap Up/Tap Down. |
• |
The TCM inhibits Manual Up/Manual Down with the
gear selector. |
• |
Torque management is enabled. |
• |
The TCM limits the transmission to reverse and 5th
range. |
P2724
• |
DTC P2724 is a Type A DTC. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM commands maximum line pressure. |
• |
The TCM inhibits Tap Up/Tap Down. |
• |
The TCM inhibits Manual Up/Manual Down with the
gear selector. |
• |
The 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 set-up 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
For Hydraulic Schematic reference and description, refer to:
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Warning: Refer to
Handbrake and Drive Wheels Warning in
the Preface section.
Note: If other DTCs are set,
diagnose those DTCs first.
- Engine ticking over in Park, with handbrake applied
and drive wheels chocked.
- Perform the
Transmission Fluid Level and Condition Check , to verify
correct fluid level and condition.
- Monitor the Transmission Fluid Pressure Switch 4
with a scan tool. Place the gear select lever in Park, Reverse, and
Neutral range. Verify the Transmission Fluid Pressure Switch 4
parameter states are correct for Park, Reverse, and Neutral. Refer
to
Transmission Fluid Pressure Switch Logic .
- Place the gear select lever in Drive range. Command
the shift transmission with a scan tool through all forward ranges.
Verify the Transmission Fluid Pressure Switch 4 parameter
states are correct for all forward ranges. Refer to
Transmission Fluid Pressure Switch Logic .
- Engine ticking over in Park, verify with a scan tool
the ISS/OSS Supply Voltage parameter displays OK.
- Engine ticking over in Park. Observe the Transmission
ISS parameter on the scan tool, while varying the engine speed. The
Transmission ISS parameter should vary with engine speed and not
drop out.
- Operate the vehicle at 16-32 km/h
(10-20 mph) while observing the Transmission OSS parameter on
the scan tool. The Transmission OSS parameter should vary with the
vehicle speed and not drop out.
Note: Perform a scan tool
snapshot, during the road test.
- Perform the
Road Test . Verify the transmission operation performs as
indicated in the road test instructions.
- Review the scan tool snapshot data. Verify the
following transmission data parameters display the correct values
for each gear range.
• |
Pressure Control Solenoid Valve 5 |
• |
Transmission Fluid Pressure Switch 4 |
- After performing the above steps, verify that the DTC
does not reset by operating the vehicle within the Conditions for
Running the DTC. You may also operate the vehicle within the
conditions you observe from the Freeze Frame/Failure Records data.
If the vehicle passes the Circuit/System Verification procedure,
then STOP. Do not perform the Circuit/System Testing or Component
Testing as this may result in an unnecessary part replacement.
Refer to
Testing for Intermittent Conditions and Poor Connections .
Circuit/System Testing
Note: You must perform the
Circuit/System Verification first.
- Perform the
Line Pressure Check . Verify the transmission line pressures
are within the range specified in the Line PC Solenoid Valve
Pressure table. Refer to Solenoid Valve Pressure .
- Ignition OFF, remove the Q8 control solenoid valve
assembly. Refer to
Control Solenoid Valve and Transmission Control Module Assembly
Replacement .
- Perform the
Control Solenoid Valve and Transmission Control Module Assembly
Solenoid Performance Test .
⇒ |
If the Q8 control solenoid valve assembly does not
pass the performance test, replace the Q8 control solenoid valve
assembly. |
- Inspect for the following conditions and repair or
replace as necessary.
DTCs
|
Component
|
Condition
|
P2723
P2724
|
Control Valve Body Assembly
|
1-2-3-4 clutch regulator valve stuck/sticking - debris, binding,
damaged valve, or scored bore
|
P2723
P2724
|
Q8 Control Solenoid Valve Assembly (314)
|
• |
Valve body filter plate assembly cracked, blocked,
or damaged gasket seal |
|
P2723
|
Lo and Reverse and 1-2-3-4 Clutch Housing Assembly (51)
|
1-2-3-4 clutch piston (414) cracked/damaged/leaking
|
P2723
|
Output Sun Gear Assembly
|
Housing/hub weld cracked/leaking
|
P2723
|
Transfer 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
|
Torque Converter (w/Fluid Pump) Housing Assembly
|
• |
Fluid pump housing/gear damaged/scored |
• |
Fluid pump or torque converter overstressed due to
high temperatures |
|
P2723
|
Automatic Transmission Fluid Filter Assembly
|
Oil filter or filter seal loose or damaged
|
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|