Circuit/System Testing

NOTE:

You must perform the Circuit/System Verification first.

1. Verify the transmission line pressures are within range. Refer to Line Pressure Check , and Solenoid Valve Pressure (Gen 1) .
   • If the line pressures are not within the specified ranges 

     Refer to Fluid Pressure High or Low .

   • If the line pressures are within the specified ranges 
2. Engine Idling, shift selector in the Drive position.
3. Verify the scan tool parameters listed below display the correct state for each gear range while commanding the scan tool Shift Transmission Gear through all forward ranges. Refer to Transmission Fluid Pressure Switch Logic for the correct gear range states.
   • TFP Switch 1
   • TFP Switch 3
   • TFP Switch 4
   • TFP Switch 5
   • If the correct state for each gear range is not displayed  
   1. Ignition OFF.
   2. Remove the Control Valve Body. Refer to Control Valve Body Replacement .
   3. Verify the Control Valve Body is not contaminated with any debris and there is no damage or sticking valves, refer to Control Valve Body Cleaning and Inspection (Gen 2) .
      • If there is contamination, damage, or sticking valves, repair or replace the control valve body as necessary.
      • If there is no contamination, damage, or sticking valves, replace the Q8 Control Solenoid Valve Assembly.
   • If the correct state for each gear range is displayed 
4. Verify the conditions listed below do not exist. Carefully inspect each component for that condition. Repair or replace as necessary.

P2714 A/Trans Fluid Filter Assembly 

Oil filter or filter seal loose or damaged.

P2714 Torque Converter (w/fluid pump) Housing Assembly 

Fluid pump housing/gear damaged/scored.

P2714 Trans case and 1-2-3-4 clutch backing plate retainer ring 

1-2-3-4 clutch backing plate retaining ring not seated/oriented correctly at trans case groove.

P2714 or P2715 Trans case, 2-6 clutch piston, spring retaining ring, reaction sun gear

• 2-6 clutch return spring retaining ring not seated in groove
• 2-6 clutch piston assembly - seal damaged or leaking
• 2-6 clutch plates worn or damaged
• 2-6 clutch plates will not slide over the reaction sun gear shell freely

P2714 Channel Plate and Spacer Plate 

Oil channels or orifices blocked by debris.

P2714 or P2715 Control Valve Body Assembly 

2-6 clutch regulator valve stuck/sticking, debris, binding, damaged valve, or scored bore.

P2714 or P2715 Q8 Control Solenoid Valve Assembly

• Pressure Control Solenoid Valve 4 Stuck ON/OFF.
• Control signal fluid supply leak - valve body filter plate assembly cracked or damaged gasket seal.
• O-ring seals leaking.