DTC P0741, P2817, or P2818

Automatic Transmission - 10L80 MHS MQC | Diagnostic Information and Procedures | Document ID: 5337148 Diagnostic Instructions Perform the Diagnostic System Check prior to using this diagnostic procedure: Diagnostic System Check - Vehicle Review the description of Strategy Based Diagnosis: Strategy Based Diagnosis An overview of each diagnostic category can be found here: Diagnostic Procedure Instructions DTC Descriptor DTC P0741 Torque Converter Clutch Performance DTC P2817 Transmission Control Solenoid Valve 8 Stuck Off DTC P2818 Transmission Control Solenoid Valve 8 Stuck On Diagnostic Fault Information

Note

DTC P0741, P2817 will set with a hydraulic/mechanical condition or high resistance in the circuit of the component Q77H without setting component/control circuit DTCs. DTC P2818 will set with a hydraulic/mechanical condition. The components are listed from the least to the most intrusive to service.

Component	DTC	Condition
Q77H Transmission Control Solenoid Valve 8	P0741, P2817, P2818	Binding or Sticking Mechanically damaged Missing components
Torque Converter Clutch Regulator Apply Valve Valve Spring Valve Body Bore	P0741, P2817, P2818	Binding or Sticking Debris on the component. Mechanically damaged
Torque Converter Clutch Blowoff Ball Valve Torque Converter Clutch Blowoff Ball Valve Spring Torque Converter Clutch Blowoff Ball Valve Retainer	P0741, P2817, P2818	Binding or Sticking Debris on the component. Mechanically damaged

Component	DTC	Condition
Torque Converter Clutch — Anti Drainback Valve	P0741, P2817, P2818	Binding or Sticking Debris on the component. Mechanically damaged
Control Valve Body	P0741, P2817, P2818	Fluid/oil passage — Restricted / Leaking
Torque Converter	P0741, P2817, P2818	Binding or Sticking Debris on the component. Mechanically damaged

Circuit/System Description For an overview of the component/system, refer to: Park - Engine Running Reverse Neutral - Engine Running Drive Range, First Gear Drive Range, Second Gear Drive Range, Third Gear Drive Range, Fourth Gear Drive Range, Fifth Gear Drive Range, Sixth Gear Drive Range, Seventh Gear Drive Range, Eighth Gear Drive Range, Ninth Gear Drive Range, Tenth Gear Electronic Component Description The solenoid valve is used to regulate fluid pressure to other transmission control valves for torque converter clutch operation. Conditions for Running the DTC P0741 DTC P0746, P0747, P0776, P0777, P0796, P0797, P2714, P2715, P2723, P2724, P2732, P2733, P281B, P281D, P281E, P2820 = Not set DTCs related to the following system/component = Not Set B14A Automatic Transmission Output Speed Sensor B14C Automatic Transmission Input Speed Sensor B26 Crankshaft Position Sensor B65 Manifold Absolute Pressure and Intake Air Temperature Sensor B75 Mass Airflow Sensor B107 Accelerator Pedal Position Sensor Q17 Fuel Injector Engine Misfire Fuel Trim System Accelerator Pedal Position Sensor = 0 to 100% Battery Voltage = Greater than 9 V Engine Speed = Greater than 499 RPM Engine Torque = Greater than 4 Nm (3 lb ft) Ignition and Start Signal = 9 to 32 V Ignition and Start Switch Signal = On Transmission Fluid Temperature = −6 to 130°C (21 to 266°F) Transmission Range ≠ P, N Frequency the DTC runs = Continuously — After the running conditions are met P2817 DTC P281B, P281D, P281E = Not set DTCs related to the following system/component = Not Set B14A Automatic Transmission Output Speed Sensor B14C Automatic Transmission Input Speed Sensor B26 Crankshaft Position Sensor B65 Manifold Absolute Pressure and Intake Air Temperature Sensor B75 Mass Airflow Sensor B107 Accelerator Pedal Position Sensor Q17 Fuel Injector Engine Misfire Fuel Trim System Accelerator Pedal Position Sensor = 8 to 99% Battery Voltage = Greater than 9 V Engine Speed = Greater than 499 RPM Engine Torque = Greater than 50 Nm (47 lb ft) Ignition and Start Signal = 9 to 32 V Ignition and Start Switch Signal = On Transmission Control Solenoid Valve 8 = On Transmission Fluid Temperature = −6 to 130°C (21 to 266°F) Frequency the DTC runs = Continuously — After the running conditions are met P2818 DTC P0746, P0747, P0776, P0777, P0796, P0797, P2714, P2715, P2723, P2724, P2732, P2733, P281B, P281D, P281E, P2820 = Not set DTCs related to the following system/component = Not Set B14A Automatic Transmission Output Speed Sensor B14C Automatic Transmission Input Speed Sensor B26 Crankshaft Position Sensor B65 Manifold Absolute Pressure and Intake Air Temperature Sensor B75 Mass Airflow Sensor B107 Accelerator Pedal Position Sensor Q17 Fuel Injector Engine Misfire Fuel Trim System 4WD Low = Disengaged Accelerator Pedal Position Sensor = Less than 6% Battery Voltage = Greater than 9 V Engine Speed = 200 to 600 RPM Engine Torque = −25 to 800 Nm (−18 to 590 lb ft) Ignition and Start Signal = 9 to 32 V Ignition and Start Switch Signal = On Transmission Control Solenoid Valve 8 = Off Transmission Range ≠ P, N Transmission Fluid Temperature = −6 to 130°C (21 to 266°F) Vehicle Speed = Less than 4 km/h (3 MPH) Frequency the DTC runs = Continuously — After the running conditions are met Conditions for Setting the DTC P0741 Torque Converter Clutch Control Valve = Stuck On P2817 Torque Converter Clutch Slip Speed = Greater than 129 RPM — For greater than 12 s P2818 Torque Converter Clutch Slip Speed = Less than 31 RPM — Greater than a predefined time. Actions Taken When the DTC Sets DTCs listed in the DTC Descriptor category = Type A DTC { If equipped } Autostart/Autostop = Disabled Grade braking = Disabled Manual Shift Control = Disabled Neutral Idle Mode = Disabled Powertrain braking = Disabled Tap Up & Tap Down = Disabled TCC Control = Disabled Transmission Adaptive Pressure Control = Freeze current adapt values Conditions for Clearing the DTC DTCs listed in the DTC Descriptor category = Type A DTC Diagnostic Aids High resistance in the circuits of the component Q77H may set DTC P2817 without setting control circuit DTC(s). Reference Information Component View Reference Transmission Solenoid Information DTC Type Reference Powertrain Diagnostic Trouble Code (DTC) Type Definitions Scan Tool Reference Control Module References Circuit/System Verification

1. Verify the condition does not exist: Incorrect fluid level or condition » Refer to: Transmission Fluid Level and Condition Check ⇒ If a condition exists Repair or replace as necessary ⇓ If no condition exists
2. Ignition » On / Vehicle » In Service Mode
3. Verify DTC P2818 is not set. ⇒ If the DTC is set Refer to step 5 ⇓ If the DTC is not set

Note

For this test, the following scan tool parameter temperature needs to be between 20 and 80°C (68 and 176°F): Transmission Fluid Temperature The scan tool control function may turn off after 30 s.

4. Perform the scan tool control function: Transmission Control Solenoid Valve 8 » On — For greater than 2 s Verify the difference between the following parameters is less than 0.05 A: Transmission Control Solenoid Valve 8 Current Transmission Control Solenoid Valve 8 Current Command ⇒ If the difference is 0.25 A or greater Repair or replace the following as necessary: Circuit High Resistance High Resistance @ Q77 Transmission Control Solenoid Valve » Refer to: Transmission Solenoid Information ⇒ If the difference is between 0.05 and 0.25 A Perform the following steps:

Note

Determining the difference between the current parameters of the components will determine if a high resistance condition is present. This step compares the original component that set the DTC with a known good component (referred to as X) on this vehicle (same type) that does not have a DTC set. 4.1. Perform the scan tool control function: Transmission Control Solenoid Valve 8 » On — For greater than 2 s Monitor and record the difference between the following scan tool parameters: Transmission Control Solenoid Valve 8 Current Command & Transmission Control Solenoid Valve 8 Current 4.2. Perform the scan tool control function: Transmission Control Solenoid Valve X » On — For greater than 2 s @ A known good component on this vehicle (same type) » Refer to: Transmission Solenoid Information Monitor and record the difference between the following scan tool parameters: Transmission Control Solenoid Valve X Current Command & Transmission Control Solenoid Valve X Current 4.3. Verify the difference between the two recorded values is 0.05 A or less — The original component that set the DTC & A known good component on this vehicle (same type) ⇒ If the difference between the recorded values is greater than 0.05 A » Repair or replace the following as necessary: Circuit High Resistance High Resistance @ Q77 Transmission Control Solenoid Valve » Refer to: Transmission Solenoid Information ⇓ If the difference between the recorded values is 0.05 A or less 4.4. Refer to step 5 ⇓ If the difference is less than 0.05 A

5. Perform the following action: Clear the DTCs.
6. 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. Refer to: Road Test Verify that no DTC listed in the DTC Descriptor Category is set. ⇒ If any of the DTCs are set Refer to: Diagnostic Fault Information & Verify the conditions listed in the table do not exist ⇓ If none of the DTCs are set
7. All OK. Repair Instructions Perform the Diagnostic Repair Verification after completing the repair: Diagnostic Repair Verification Automatic Transmission Fluid, Fluid Pan and/or Filter Replacement Control Valve Body Replacement Torque Converter Diagnosis Torque Converter Replacement For control module replacement, programming, and setup refer to: Control Module References Additional Procedures Transmission Service Fast Learn Procedure — Perform only when the component/system is serviced.