DTC P0961-P0963
Diagnostic InstructionsDTC Descriptor
DTC P0961

Line Pressure Control Solenoid Valve 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

For an overview of the component/system, refer to:Electronic Component Description

Circuit

Description

Control

The output circuit is switched to 12 V to activate the component.

Control

The output circuit is switched to ground to activate the component.

Component

Description

K71 Transmission Control Module

The control module receives information from a variety of sensors, switches and serial data information from other control modules. This information is used to control a combination of solenoid valves to obtain the correct line pressure, gear ratio and torque converter clutch operation.

K71 is part of the component:Q8 Control Solenoid Valve Assembly

Q27A Pressure Control Solenoid Valve 1

A solenoid valve is an electro-mechanically operated valve. The valve is controlled by an electric current through the solenoid.

The solenoid valve varies the control pressure depending on the current applied to the solenoid coil.

  • The solenoid valve control pressure decreases with increasing current.
  • The solenoid valve control pressure is high with minimum current.

Q27A is part of the component:Q8 Control Solenoid Valve Assembly

No external circuit diagnosis is involved.

Conditions for Running the DTC
  • Engine Speed=400 to 7,500 RPM
  • Ignition Voltage=9 to 32 V

Frequency the DTC runs=Continuously—After the running conditions are met—For greater than 5 s

Conditions for Setting the DTCP0961

Control Circuit=Commanded state does not match the actual state—For greater than 4.4 s—Within 5 s

P0962

Control Circuit=Short to Ground—For greater than 1.5 s—Within 1.9 s

P0963

Control Circuit=Open CircuitorShort to Voltage—For greater than 4.4 s—Within 5 s

Actions Taken When the DTC Sets

DTC P0961, P0963=Type B DTC—Additional actions taken:

  • Line Pressure Command=Maximum
  • Transmission Adaptive Pressure Control=Freeze current adapt values

DTC P0962=Type A DTC—Additional actions taken:

  • Grade braking=Disabled
  • High Side Driver=Disabled
  • Line Pressure Command=Maximum
  • Manual Shift Control=Disabled
  • Mode Switch=Disabled
  • Neutral Idle Mode=Disabled
  • Powertrain braking=Disabled
  • TCC Control=Disabled
  • Transmission Adaptive Pressure Control=Freeze current adapt values
  • Transmission gear allowed=Reverse&4th Gear
Conditions for Clearing the DTCP0961, P0963

DTC P0961, P0963=Type B DTC

P0962

DTC P0962=Type A DTC

Reference Information

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

Master Electrical Component List

Electrical Information ReferenceDTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Scan Tool Reference

Control Module References

Special Tools

DT-48616-10 - Adapter Harness

Equivalent regional tools:Special Tools

Circuit/System Verification
  1. Transmission in Park
  2. Engine»Idling
  3. Perform the scan tool control function:Line Pressure Control Solenoid Valve»From lowest value to maximum value

    Verify the scan tool parameter:

    • Line Pressure Control Solenoid Valve Control Circuit High Voltage Test Status=OKorNot Run
    • Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status=OKorNot Run
    • Line Pressure Control Solenoid Valve Performance Test Status=OKNot Run
    • If not the specified state

      Refer to:Component Testing

    • If the specified state
  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.

    Verify the DTC does not set.

    • If the DTC sets

      Refer to:Component Testing

    • If the DTC is not set
  5. All OK.
Component Testing
  1. Ignition/Vehicle » Off
  2. Remove the component:Q8 Control Solenoid Valve Assembly
  3. Verify a condition does not exist with the component:Contamination with metallic debris
    • If a condition exists

      Repair or replace as necessary

    • If no condition exists
  4. Verify the resistance is within the specified range for each solenoid valve.»Refer to:Control Solenoid Valve and Transmission Control Module Assembly Inspection
    • If the resistance is not within range

      Replace the component:Q8 Control Solenoid Valve Assembly

    • If the resistance is within range
  5. Install»DT-48616-10 - Adapter Harness@Q8 Control Solenoid Valve Assembly&Vehicle wiring harness X1
  6. Ignition » On / Vehicle » In Service Mode
  7. Perform the scan tool control function:Line Pressure Control Solenoid Valve»Increase—From lowest value to maximum value

    Verify the scan tool parameter:

    • Line Pressure Control Solenoid Valve Control Circuit High Voltage Test Status=OKorNot Run
    • Line Pressure Control Solenoid Valve Control Circuit Low Voltage Test Status=OKorNot Run
    • Line Pressure Control Solenoid Valve Performance Test Status=OKorNot Run
    • If not the specified state

      Replace the component:Q8 Control Solenoid Valve Assembly

    • If the specified state
  8. All OK.
Repair Instructions

Perform the Diagnostic Repair Verification after completing the repair:Diagnostic Repair Verification

Additional Procedures

Transmission Adaptive Values Learn—Perform after any repair