P0970
DTC P0969-P0971
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 P0969
- Pressure Control (PC) Solenoid 3 System Performance
DTC P0970
- Pressure Control (PC) Solenoid 3 Control Circuit Low Voltage
DTC P0971
- Pressure Control (PC) Solenoid 3 Control Circuit High Voltage
Circuit/System Description
Pressure control solenoid 3 is part of the control solenoid valve assembly which has no serviceable components. The normally high pressure control solenoid 3 regulates and directs oil pressure to the R1/4-5-6 regulator valve. Increasing pressure control solenoid 3 pressure increases pressure to the low and reverse clutch or 4-5-6 clutch, depending on the position of the clutch select valve 2. The transmission control module (TCM) varies current to pressure control Solenoid 3 by controlling the time the low side driver is ON and OFF. Decreasing the current to pressure control solenoid 3 increases oil pressure by closing off the solenoid exhaust port. Increasing the current to the pressure control solenoid 3 decreases oil pressure by opening the exhaust port. Power is supplied to the pressure control solenoid 3 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
P0969
* DTC P0969 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is 8.6-32 V.
P0970
* DTC P0970 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is 8.6-32 V.
P0971
* DTC P0971 is not set.
* Engine speed is 400-7500 RPM for 5 s.
* Ignition voltage is 8.6-32 V.
Conditions for Setting the DTC
P0969
TCM detects an internal electrical performance malfunction of the clutch pressure control solenoid 3 control circuit where the measured clutch pressure control solenoid 3 currents does not equal the commanded clutch pressure control solenoid 3 current for 5 s.
P0970
TCM detects a short to ground on the clutch pressure control solenoid 3 control circuit for 1 s.
P0971
TCM detects an open or short to voltage on the clutch pressure control solenoid 3 control circuit for 1 s.
Action Taken When the DTC Sets
P0969
* DTC P0969 is a Type C DTC.
* TCM freezes transmission adaptive functions to the low and reverse clutch and 4-5-6 clutch.
P0970 or P0971
* DTCs P0970 and P0971 are Type A DTCs.
* TCM limits the transmission to Reverse and 3rd or 5th gear operation.
* 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 enables torque management.
* TCM inhibits Tap Up/Down function.
* TCM inhibits manual shifting of forward gears.
Conditions for Clearing the DTC
* DTC P0969 is a Type C DTC.
* DTCs P0970 and P0971 are Type A DTCs.
Reference Information
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 with transmission 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 3 Performance Test Status
* Pressure Control Solenoid Valve 3 Control Circuit Low Voltage Test Status
* Pressure Control Solenoid Valve 3 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 3 Performance Test Status
* Pressure Control Solenoid Valve 3 Control Circuit Low Voltage Test Status
* Pressure Control Solenoid Valve 3 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.