P0966
DTC P0965-P0967
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 P0965
- Pressure Control (PC) Solenoid 2 System Performance
DTC P0966
- Pressure Control (PC) Solenoid 2 Control Circuit Low Voltage
DTC P0967
- Pressure Control (PC) Solenoid 2 Control Circuit High Voltage
Circuit/System Description
Pressure control solenoid 2 is part of the control solenoid valve assembly which has no serviceable components. The normally high pressure control solenoid 2 regulates and directs oil pressure to the 3-5 reverse clutch regulator valve. Increasing pressure to the 3-5 reverse clutch regulator valve increases pressure to the 3-5 reverse clutch. The transmission control module (TCM) varies the current to the pressure control solenoid 2 by controlling the amount of time the low side driver is ON and OFF. Decreasing the current to the pressure control solenoid 2 increases pressure control solenoid 2 oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the pressure control solenoid 2 decreases pressure control solenoid 2 oil pressure by opening the solenoid exhaust port. Power to pressure control solenoid 2 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
P0965
* DTC P0965 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is 8.6-32 V.
P0966
* DTC P0966 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is 8.6-32 V.
P0967
* DTC P0967 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is 8.6-32 V.
Conditions for Setting the DTC
P0965
TCM detects an internal electrical performance malfunction of the pressure control solenoid 2 control circuit where the measured pressure control solenoid 2 current does not equal the commanded pressure control solenoid 2 current for 5 s.
P0966
TCM detects a short to ground on the pressure control solenoid 2 control circuit for 1 s.
P0967
TCM detects an open or short to voltage on the pressure control solenoid 2 control circuit for 1 s.
Action Taken When the DTC Sets
P0965
* DTC P0965 is a Type C DTC.
* TCM freezes transmission adaptive functions on the 3-5-Reverse clutch.
P0966
* DTC P0966 is a Type A DTC.
* TCM limits the transmission to Reverse and 3rd or 5th gear operation.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM turns the high side driver OFF.
* TCM forces the torque converter clutch (TCC) OFF.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
* TCM enables torque management.
P0967
* DTC P0967 is a Type A DTC.
* TCM limits the transmission to Reverse and 3rd gear operation.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
Conditions for Clearing the DTC
* DTC P0965 is a Type C DTC.
* DTCs P0966 and P0967 are Type A DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics Electrical Diagrams
Connector End View Reference
* Component Connector End Views A/C Compressor Clutch
* 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-47825-20 - 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, then operate the vehicle in Park for 5 s.
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 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
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 the DTC sets
Refer to Circuit/System Testing.
• If the 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 contaminated
Repair as necessary.
• If not contaminated
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-47825-20 - 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 repairs.
* Perform the Reset Transmission Adapts Reset Procedure 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.