Circuit/System Testing

NOTE:

You must perform the Circuit/System Verification first.

1. Engine idling at the normal operating temperature.
2. Verify the transmission line pressures are within the specified range. Refer to Line Pressure Check (Non Hybrid) , and Solenoid Valve Pressure (Gen 2) .
   • If the pressures are not within range 

     Refer to Fluid Pressure High or Low .

   • If the pressures are within range 
3. Ignition OFF, remove the Q8 Control Solenoid Valve Assembly.
4. Verify the pressure changes for all solenoid valves when performing the solenoid valve test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
   • If the pressure does not change 

     Replace the Q8 Control Solenoid Valve Assembly.

   • If the pressure changes 
5. Verify the mechanical conditions listed below do not exist. Repair or replace as necessary.

P2723 or P2724 - Control Valve Body Assembly 

1-2-3-4 clutch regulator valve stuck/sticking - debris, binding, damaged valve, or scored bore.

P2723 - Automatic Transmission Fluid Filter Assembly  

Oil filter or filter seal loose or damaged.

P2723 - Torque Converter (w/Fluid Pump) Housing Assembly

• Fluid pump housing/gear damaged/scored.
• Fluid pump or torque converter overstressed due to high temperatures.

P2723 - Trans Case and 1-2-3-4 Clutch Backing Plate Retaining Ring 

1-2-3-4 clutch backing plate retaining ring not seated/oriented, causing clutch pack/piston over travel.

P2723 - Output Sun Gear Assembly 

Housing/hub weld cracked/leaking.

P2723 - Lo and Reverse and 1-2-3-4 Clutch Housing Assembly 

1-2-3-4 clutch piston cracked/damaged/leaking.

P2723 - Channel Plate and Spacer Plate 

Oil channels or orifices blocked by debris.

P2723 or P2724 - Q8 Control Solenoid Valve Assembly

• Q27E Pressure Control Solenoid Valve 5 Stuck ON/OFF.
• O-ring seals leaking.
• Valve body filter plate assembly cracked, blocked, or damage gasket seal.