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
-
Clutch Pressure Control (PC) Solenoid 3 System Performance
DTC P0970
-
Clutch Pressure Control (PC) Solenoid 3 Control Circuit Low Voltage
DTC P0971
-
Clutch Pressure Control (PC) Solenoid 3 Control Circuit High Voltage
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The clutch pressure (PC) solenoid 3 is part of the control solenoid valve assembly, which has no serviceable components. The normally high clutch PC solenoid 3 regulates and directs the clutch PC solenoid 3 oil pressure to the R1/4-5-6 clutch regulator valve and 4-5-6 clutch boost valve. Increasing clutch PC solenoid 3 oil pressure increases oil pressure to the low and reverse clutch or the 4-5-6 clutch, depending on the position of the clutch select valve 2. The transmission control module (TCM) varies the current to the PC solenoid 3 through a low side driver. Decreasing the current to the clutch PC solenoid 3 increases clutch PC solenoid 3 oil pressure by closing OFF the solenoid exhaust port. Increasing the current to the clutch PC solenoid 3, decreases clutch PC solenoid 3 oil pressure by opening the solenoid exhaust port. Clutch PC solenoid 3 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected the HSD will reset.
Conditions for Running the DTC
P0969
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 8.6 volts or greater.
* DTC P0969 is not set.
P0970
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 8.6 volts or greater.
* DTC P0970 is not set.
P0971
* Engine speed is 400 RPM or greater for 5 seconds.
* Ignition voltage is 8.6 volts or greater.
* DTC P0971 is not set.
Conditions for Setting the DTC
P0969
TCM detects an internal electrical performance malfunction of the clutch PC solenoid 3 control circuit where the measured clutch PC solenoid 3 currents does not equal the commanded clutch PC solenoid 3 current for 5 seconds.
P0970
TCM detects a short to ground on the clutch PC solenoid 3 control circuit for 1 second.
P0971
TCM detects an open or short to voltage on the clutch PC solenoid 3 control circuit for 1 second.
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 HSD OFF.
* TCM inhibits neutral idle.
* 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 X101
Description and Operation
Transmission General Description Transmission General 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 seconds.
2. Operate the vehicle in Drive range. Allow the transmission to shift through all forward gear ranges. Verify with a scan tool the following test status parameters display OK:
* PC Sol. 3 Perf. Test Status
* PC Sol. 3 Ckt. High Voltage Test Status
* PC Sol. 3 Ckt. Low Voltage Test Status
• If any test status parameter displays Fault or Malfunction
Refer to Circuit/System Testing below.
• If all test status parameters display OK
3. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
Note:
You must perform the Circuit/System Verification first.
1. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement Service and Repair.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection. The Q8 control solenoid valve and transmission control module assembly must be externally cleaned of all debris.
3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.
4. Connect the DT-47825-20 - harness between the vehicle wire harness X1 20-way transmission electrical connector, and the Q8 control solenoid valve assembly electrical connector.
5. Ignition ON, verify with a scan tool the following test status parameters display OK:
* PC Sol. 3 Perf. Test Status
* PC Sol. 3 Ckt. High Voltage Test Status
* PC Sol. 3 Ckt. Low Voltage Test Status
• If any test status parameter displays Fault or Malfunction
Replace the Q8 control solenoid valve assembly.
• If all test status parameters display OK
6. All OK.
Repair Instructions
Note:
* Perform the Reset Transmission Adapts Reset Transmission Adapts following all transmission related repairs.
* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Control Module References Control Module References for control solenoid valve assembly replacement, setup, and programming