DTC P2714 or P2715
Diagnostic Instructions
DTC Descriptors
DTC P2714: Pressure Control Solenoid Valve 4
Stuck Off
DTC P2715: Pressure Control Solenoid
Valve 4 Stuck On
Circuit/System Description
The clutch pressure control (PC) solenoid 4 is part of
the control solenoid valve assembly which has no serviceable
components. The PC solenoid 4 regulates transmission fluid
pressure (TFP) to the 2-6 regulator valve which controls
pressure to the 2-6 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
P2714
• |
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 high side driver (HSD) is enabled. |
• |
The throttle position signal is valid. |
• |
The ignition voltage is 9.0 volts or
greater. |
• |
The transmission fluid temperature (TFT) is
-7°C (19°F) or greater. |
• |
The engine speed is greater than 400 RPM for
5 seconds. |
• |
The 2-6 clutch is commanded ON. |
• |
The output speed is greater than 650 RPM or
the throttle position is greater than 0.5 percent. |
P2715
• |
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 transmission output shaft speed is
200 RPM or greater. |
• |
The 2-6 clutch is commanded OFF. |
• |
The TFT is 0°C (32°F) or greater. |
• |
The attained range is not 1st gear. |
• |
The transmission input speed is 200 RPM or
greater. |
Conditions for Setting the DTC
P2714
The TCM detects an incorrect on-coming clutch gear ratio, or
shift flare.
P2715
The TCM detects an incorrect off-going clutch gear ratio, or
shift tie-up.
Action Taken When the DTC Sets
P2714
• |
DTC P2714 is a Type A DTC. |
• |
The TCM commands maximum line pressure. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM inhibits the Tap Up/Tap Down
function. |
• |
The TCM inhibits manual shifting of forward
gears. |
• |
The TCM limits the transmission to reverse and 3rd
gear. |
P2715
• |
DTC P2715 is a Type A DTC. |
• |
The TCM commands maximum line pressure. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM inhibits the Tap Up/Tap Down
function. |
• |
The TCM inhibits manual shifting of forward
gears. |
• |
The TCM limits the transmission to reverse and 2nd
gear. |
Conditions for Clearing the DIC/DTC
DTCs P2714 and P2715 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
Schematic Reference
Description and Operation
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 3
with a scan tool. Place the gear select lever in Park, Reverse, and
Neutral range. Verify the Transmission Fluid Pressure Switch 3
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 3 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 4 |
• |
Transmission Fluid Pressure Switch 3 |
- 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/replace as necessary.
DTCs
|
Component
|
Condition
|
P2714
P2715
|
Control Valve Body Assembly
|
2-6 clutch regulator valve stuck/sticking, debris, binding,
damaged valve, or scored bore
|
P2714
P2715
|
Q8 Control Solenoid Valve Assembly
|
• |
Control signal fluid supply leak - valve body
filter plate assembly cracked or damaged gasket seal |
|
P2714
P2715
|
Transfer case, 2-6 clutch piston, spring retaining ring,
reaction sun gear
|
• |
2-6 clutch return spring retaining ring not seated
in groove |
• |
2-6 clutch piston assembly - seal damaged or
leaking |
• |
2-6 clutch plates worn or damaged |
• |
2-6 clutch plates will not slide over the reaction
sun gear shell freely |
|
P2714
|
Transfer case and 1-2-3-4 clutch backing plate retainer ring
|
1-2-3-4 clutch backing plate retaining ring not seated/oriented
correctly at transfer case groove
|
P2714
|
Torque Converter (w/fluid pump) Housing Assembly
|
Fluid pump housing/gear damaged/scored
|
P2714
|
A/Trans Fluid Filter Assembly
|
Oil filter or filter seal loose or damaged
|
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|