P2719
DTC P2719-P2721
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 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
Circuit/System Description
Pressure control solenoid 4 is part of the control solenoid valve assembly which has no serviceable components. The normally low PC solenoid 4 regulates and directs oil pressure to the 2-6 clutch regulator valve. Increasing pressure control solenoid 4 pressure increases pressure to the 2-6 clutch. The transmission control module (TCM) varies current to the pressure control solenoid 4 by controlling the amount of time the low side driver is ON and OFF. Increasing the ON time increases current to the clutch PC solenoid 4. Increasing current to pressure control solenoid 4 increases oil pressure by closing off the solenoid exhaust port. Decreasing the current to the pressure control solenoid 4 decreases oil pressure by opening the exhaust port. Pressure control solenoid 4 power is supplied by the TCM through a high side driver. The high side driver protects the circuit and components from excessive current flow. If excessive current flow is detected, the high side driver will turn OFF. When the fault is corrected, the high side driver will reset.
Conditions for Running the DTC
* Engine speed is 400-7500 RPM for 5 seconds.
* Ignition voltage is 9-32 V.
Conditions for Setting the DTC
P2719
TCM detects an internal electrical performance malfunction of the clutch pressure solenoid 4 control circuit where the measured clutch pressure control solenoid 4 current does not equal the commanded clutch pressure control solenoid 4 current for 5 seconds.
P2720
TCM detects a short to ground on the clutch pressure control solenoid 4 control circuit for 1 second.
P2721
TCM detects an open or short to voltage on the clutch pressure control solenoid 4 control circuit for 1 second.
Action Taken When the DTC Sets
P2719
* DTC P2719 is a Type C DTC.
* TCM freezes transmission adaptive functions on the 2-6 clutch.
P2720
* DTC P2720 is a Type A DTC.
* TCM limits the transmission to 2nd gear and reverse.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM inhibits neutral idle.
* TCM inhibits auto grade braking.
* TCM inhibits Tap Up/Tap Down function.
* TCM inhibits manual up, manual down shifts with the shift selector.
* TCM commands 2nd gear if the transmission is in a forward gear and the output speed is less than 700 RPM.
P2721
* DTC P2721 is a Type A DTC.
* TCM limits the transmission to 3rd gear and reverse.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM inhibits neutral idle.
* TCM inhibits Tap Up/Tap Down function.
* 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 Electrical Diagrams
Connector End View Reference
* Component Connector End Views Fuel Pump and Level Sensor Assembly
* Inline Harness Connector End Views X100
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
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Special Tools
DT-48616-10 - Adapter Harness
For equivalent regional tools, refer to Special Tools Tools and Equipment.
Circuit/System Verification
1. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature.
2. Operate the vehicle in drive range. Allow the transmission to shift through all forward gear ranges.
3. Verify the scan tool parameters listed below do not display Malfunction:
* Pressure Control Solenoid Valve 4 Performance Test Status
* Pressure Control Solenoid Valve 4 Control Circuit Low Voltage Test Status
* Pressure Control Solenoid Valve 4 Control Circuit High Voltage Test Status
• If Malfunction is displayed
Refer to Circuit/System Testing.
• If Malfunction is not displayed
4. 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.
5. Verify the DTC does not set.
• If a DTC sets
Refer to Circuit/System Testing.
• If a DTC does not set
6. All OK
Circuit/System Testing
Note: You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
2. Verify the Q8 Control Solenoid Valve Assembly is not contaminated with any debris and clean as necessary. Refer to Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
• If contamination is present
Repair as necessary.
• If contamination is not present
3. Verify the resistance is within range the specified range for each solenoid listed in the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
• If the resistance is not within range
Replace the Q8 Control Solenoid Valve Assembly.
• If the resistance is within range
4. Place the Q8 Control Solenoid Valve Assembly on a clean work surface near the transmission assembly.
5. Connect the DT-48616-10 - adapter harness between the vehicle harness connector and the Q8 Control Solenoid Valve Assembly connector. Ignition ON.
6. Verify the scan tool parameters listed below do not display Malfunction:
* Pressure Control Solenoid Valve 2 Performance Test Status
* Pressure Control Solenoid Valve 2 Control Circuit Low Voltage Test Status
* Pressure Control Solenoid Valve 2 Control Circuit High Voltage Test Status
• If Malfunction is displayed
Replace the Q8 Control Solenoid Valve Assembly.
• If Malfunction is not displayed
7. All OK
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Perform the Transmission Adaptive Values Learn Transmission Adaptive Values Learn following all transmission repairs.
* Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair
* Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.