DTC P2719-P2721
Diagnostic Instructions
DTC Descriptors
DTC P2719: Pressure Control Solenoid Valve 4
Performance
DTC P2720: Pressure Control Solenoid
Valve 4 Control Circuit Low Voltage
DTC P2721: Pressure Control Solenoid
Valve 4 Control Circuit High Voltage
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Clutch PC Solenoid 4 Control
|
P2720
|
P2721
|
P2721
|
P2719
|
Typical Scan Tool Data
Pressure Control Solenoid Valve 4
Performance Test Status
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Operating Conditions: Engine running,
normal operating temperature
Parameter Normal Range: OK
|
Pressure Control Solenoid Valve 4 Control
|
--
|
--
|
--
|
Fault or Malfunction
|
Pressure Control Solenoid Valve 4
Control Circuit Low Voltage Test Status
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Operating Conditions: Engine running,
normal operating temperature
Parameter Normal Range: OK
|
Pressure Control Solenoid Valve 4 Control
|
Fault or Malfunction
|
--
|
--
|
--
|
Pressure Control Solenoid Valve 4
Control Circuit High Voltage Test Status
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Operating Conditions: Engine running,
normal operating temperature
Parameter Normal Range: OK
|
Pressure Control Solenoid Valve 4 Control
|
-
|
Fault or Malfunction
|
Fault or Malfunction
|
--
|
Circuit/System Description
The clutch pressure control (PC) solenoid 4 is part of
the control solenoid valve assembly which has no serviceable
components. The normally low clutch PC solenoid 4 regulates
and directs oil pressure to the 2-6 clutch regulator valve.
Increasing clutch PC solenoid 4 pressure increases pressure to
the 2-6 clutch. The transmission control module (TCM) PC
solenoid 4 low side driver varies current to the solenoid.
Increasing the current to the clutch PC solenoid 4 increases
oil pressure by closing off the solenoid exhaust port. Decreasing
the current to the clutch PC solenoid 4 decreases oil pressure
by opening the exhaust port. PC solenoid 4 power is supplied
by the TCM through a high side driver (HSD). The HSD protects
the circuit and components from excessive current flow. If
excessive current flow is detected, the HSD will turn OFF. When the
fault is corrected, the HSD will reset.
Conditions for Running the DTC
P2719, P2720, or P2721
• |
The engine speed is 400 RPM or greater for
5 seconds. |
• |
The ignition voltage is 9.0 volts or
greater. |
Conditions for Setting the DTC
P2719
The TCM detects an internal electrical performance malfunction
of the clutch PC solenoid 4 control circuit where the measured
clutch PC solenoid 4 current does not equal the commanded
clutch PC solenoid 4 current for 5 seconds.
P2720
The TCM detects a short-circuit to ground on the clutch PC
solenoid 4 control circuit for 1 second.
P2721
The TCM detects an open or short-circuit to voltage on the
clutch PC solenoid 4 control circuit for 1 second.
Action Taken When the DTC Sets
P2719
• |
DTC P2719 is a Type C DTC. |
• |
The TCM freezes transmission adaptive functions on
the 2-6 clutch. |
P2720
• |
DTC P2720 is a Type A DTC. |
• |
The TCM limits the transmission to 2nd gear and
reverse. |
• |
The TCM commands maximum line pressure. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM inhibits Tap Up/Tap Down function. |
• |
The TCM inhibits manual up, manual down shifts
with the shift selector. |
P2721
• |
The DTC P2721 is a Type A DTC. |
• |
The TCM limits the transmission to 3rd gear and
reverse. |
• |
The TCM commands maximum line pressure. |
• |
The TCM freezes transmission adaptive
functions. |
• |
The TCM inhibits Tap Up/Tap Down function. |
• |
The TCM inhibits manual shifting of forward
gears. |
Conditions for Clearing the DTC
• |
DTC P2719 is a Type C DTC. |
• |
DTCs P2720 and P2721 are
Type A DTCs. |
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics
Connector End View Reference
Description and Operation
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Special Tools
DT-48616-10 Adapter Harness
For equivalent regional tools, refer to
Special Tools .
Circuit/System Verification
- Operate the vehicle in second gear long enough to
ensure at least a 3°C (5°F) rise in TCM temperature, then
operate the vehicle in PARK for 5 seconds.
- Operate the vehicle in drive range. Allow the
transmission to change through all forward gear ranges. Verify with
a scan tool, the following test status parameters display OK.
• |
Pressure Control Solenoid Valve 4 Performance
Test Status |
• |
Pressure Control Solenoid Valve 4 Control
Circuit High Voltage Test Status |
• |
Pressure Control Solenoid Valve 4 Control
Circuit Low Voltage Test Status |
- 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.
- 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
Inspection .
- Place the Q8 control solenoid valve assembly on a
clean work surface near the transmission assembly.
- Connect DT-48616-10 harness between the
vehicle wire harness X1 14-way transmission electrical
connector, and the Q8 control solenoid valve assembly.
- Ignition ON, verify with a scan tool the following
test status parameters display, OK.
• |
Pressure Control Solenoid Valve 4 Performance
Test Status |
• |
Pressure Control Solenoid Valve 4 Control
Circuit High Voltage Test Status |
• |
Pressure Control Solenoid Valve 4 Control
Circuit Low Voltage Test Status |
⇒ |
If any test status parameter displays Fault or
Malfunction, replace the Q8 control solenoid valve assembly. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|