• 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

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

• Drive Range, First Gear
• Drive Range, Second Gear
• Drive Range, Third Gear
• Drive Range, Fourth Gear
• Drive Range, Fifth Gear
• Drive Range, Sixth Gear
• Reverse
• Electronic Component Description
• Fluid Passages

The solenoid valve controls fluid pressure to the 4-5-6 regulator valve that controls the fluid pressure to the 4-5-6 clutch.

DTC P0796, P0797 will set with a hydraulic/mechanical condition.

• DTC P0101–P0103, P0106–P0108, P0171, P0172, P0174, P0175, P0201–P0208, P0300–P0308, P0401, P042E, P0716, P0717, P0722, P0723, P182E = Not set
• Accelerator Pedal Position=Greater than 0.5%
• Accelerator pedal position signal = Valid
• Engine Speed=400 to 7,500 RPM
• High Side Driver=Enabled
• Ignition Voltage=9 to 32 V
• Transmission Fluid Temperature=Warmer than −6.7°C (20°F)
• Transmission Output Speed=Greater than 100 RPM
• Transmission Range Command=4th Gearor5th Gearor6th gear

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

• DTC P0101–P0103, P0106–P0108, P0171, P0172, P0174, P0175, P0201–P0208, P0300–P0308, P0401, P042E, P0716, P0717, P0722, P0723, P182E = Not set
• Accelerator Pedal Position=Greater than 0.5%
• Accelerator pedal position signal = Valid
• Engine Speed=400 to 7,500 RPM—For greater than 5 s
• High Side Driver=Enabled
• Ignition Voltage=9 to 32 V
• Transmission Fluid Temperature=If −6.7°C (20°F) or warmer
• Transmission Output Speed=Greater than 100 RPM
• 4-5-6 Clutch=Commanded Off

Frequency the DTC runs=Continuously—Until commanded gear ratio is attained

4-5-6 Clutch=Not applied—For greater than 3 s

The above condition(s) must occur 3 times.

4-5-6 Clutch=Applied—For greater than 1.1 s

The above condition(s) must occur 3 times.

DTCs listed in the DTC Descriptor category=Type A DTC—Additional actions taken:

• Grade braking=Disabled
• Line Pressure Command=Maximum
• Manual Shift Control=Disabled
• Mode Switch=Disabled
• Neutral Idle Mode=Disabled
• Powertrain braking=Disabled
• { P0796 }Transmission gear allowed=3rd Gear
• { P0797 }Transmission gear allowed=4th Gear
• { P0797 }Torque Management=Active
• Transmission Adaptive Pressure Control=Freeze current adapt values

DTCs listed in the DTC Descriptor category=Type A DTC

Powertrain Diagnostic Trouble Code (DTC) Type Definitions

Control Module References

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. Clear the DTCs.
4. Road test the vehicle.»Refer to:Road Test

   Verify DTC P0716, P0717, P0722, P0723 is not set

• If any of the DTCs are set

  Refer to:Diagnostic Trouble Code (DTC) List - Vehicle

• If none of the DTCs are set
5. Verify DTC P0796, P0797 is not set
• If DTC P0796 or P0797 is set

  Refer to:Circuit/System Testing

• If none of the DTCs are set
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.

   Verify the DTC does not set.

• If the DTC sets

  Refer to:Circuit/System Testing

• If the DTC is not set
7. All OK.

1. Verify the condition does not exist:Incorrect pressure»Refer to:Line Pressure Check&Solenoid Valve Pressure
• If a condition exists

  Refer to:Fluid Pressure High or Low

• If no condition exists
2. Ignition/Vehicle » Off
3. Remove the component:Q8 Control Solenoid Valve Assembly
4. Verify the procedure/test passes.»Refer to:Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test
• If the procedure/test does not pass

  Replace the component:Q8 Control Solenoid Valve Assembly

• If the procedure/test passes
5. Refer to:Diagnostic Fault Information

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

• 3-5-Reverse and 4-5-6 Clutch Housing Disassemble
• Control Solenoid Valve and Transmission Control Module Assembly Replacement—Q8 Control Solenoid Valve Assembly
• Control Valve Body Assembly Removal
• Control Valve Channel Plate Cleaning and Inspection
• Transmission Fluid Pump Disassemble
• For control module replacement, programming, and setup refer to:Control Module References

Transmission Adaptive Values Learn—Perform only when the component/system is serviced.