P0962
DTC P0961-P0963
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 P0961
- Line Pressure Control Solenoid Valve System Performance
DTC P0962
- Line Pressure Control Solenoid Valve Control Circuit Low Voltage
DTC P0963
- Line Pressure Control Solenoid Valve Control Circuit High Voltage
Circuit/System Description
The line pressure control solenoid is part of the control solenoid valve assembly which has no serviceable components. The normally high line pressure control solenoid regulates and directs the line pressure control solenoid oil pressure to the pressure regulator valve. Increasing line PC solenoid pressure increases transmission line pressure. The transmission control module (TCM) varies the current to the line pressure control solenoid by controlling the amount of time the low side driver is ON and OFF. Decreasing the ON time, decreases the current to the line pressure control solenoid, which increases line pressure control solenoid oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the line pressure control solenoid decreases line pressure control oil pressure by opening the solenoid exhaust port. Line pressure control solenoid 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
P0961
TCM detects an internal electrical malfunction of the line pressure control solenoid where the measured line pressure control solenoid current does not equal the commanded line PC solenoid current for 5 seconds.
P0962
TCM detects a short to ground on the line pressure control solenoid control circuit for 2 seconds.
P0963
TCM detects an open circuit or short to voltage on the line pressure control solenoid control circuit for 5 seconds.
Action Taken When the DTC Sets
P0961 or P0963
* DTCs P0961 and P0963 are Type B DTCs.
* TCM freezes transmission adaptive functions.
* TCM commands maximum line pressure.
P0962
* DTC P0962 is a Type A DTC.
* TCM limits the transmission to 4th gear and reverse.
* TCM inhibits the torque converter clutch (TCC).
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM turns the high side driver OFF.
* TCM inhibits neutral idle.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
* TCM enables torque management.
Conditions for Clearing the DIC/DTC
* DTCs P0961 and P0963 are Type B DTCs.
* DTC P0962 is a Type A DTC.
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
Warning: Refer to Parking Brake and Drive Wheels Warning Parking Brake and Drive Wheels Warning.
1. Engine running, transmission in PARK. Move the S3 Transmission Shift Lever into each gear position for 2-3 seconds and back into the PARK position.
2. Verify the scan tool parameters listed below do not display Malfunction:
* Line Pressure Control Solenoid Valve Performance Test Status
* Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
* Line Pressure Control Solenoid Valve Control Circuit High Voltage Test Status
• If Malfunction is displayed
Refer to Circuit/System Testing.
• If Malfunction is not displayed
3. 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.
4. Verify the DTC does not set.
• If the DTC sets
Refer to Circuit/System Testing.
• If the DTC does not set
5. 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 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:
* Line Pressure Control Solenoid Valve Performance Test Status
* Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status
* Line Pressure Control Solenoid Valve 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.
* Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair
* Perform the Transmission Adaptive Values Learn Transmission Adaptive Values Learn following all transmission repairs.
* Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.