Circuit/System Testing

1. Verify the transmission line pressures are within the specified ranges. Refer to Line Pressure Check .
   • If pressures are not within range 

     Refer to Fluid Pressure High or Low .

   • If pressures are within range 
2. Ignition OFF. Remove the Q8 Control Solenoid Valve Assembly.
3. Verify a pressure change occurs for each solenoid when performing the solenoid test. Refer to Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
   • If a pressure change does not occur 

     Replace the Q8 Control Solenoid Valve Assembly.

   • If a pressure change does occur 
4. Verify the conditions listed below do not exist. Carefully inspect each component for that condition. Repair or replace as necessary.

P0741 or P0742 - A/Trans Fluid Pump cover Assembly (219)

• TCC Control Valve (227) stuck/sticking - debris, binding, damaged valve, or scored bore.
• Converter Feed Limit Valve (220) stuck/sticking - debris, binding, damaged valve, or scored bore.
• Pressure Regulator Valve (233) stuck/sticking - debris, binding, damaged valve, or scored bore.
• Turbine Shaft Bushings (218), (228) damaged or loose.
• Leak between stator/tower assembly and cover.

P0741 - 4-5-6 (w/Turbine Shaft) Housing Assembly (441) 

TCC Turbine Shaft O-ring Seal (443) damaged or leaking.

P0741 - Torque Converter Assembly (1)

• TCC friction material debonded or excessively worn.
• One way stator clutch distressed.
• Internal leak - missing or damaged seal.
• Overheated due to lack of lubrication/cooler flow.

P0741 or P0742 - Lower Control Valve Body Assembly (351)

• TCC Regulator Apply Valve (355) stuck/sticking - debris, binding, damaged valve, or scored bore. Bore plug (328) undersized or leaking.
• Clutch Select Valve 2 (352) stuck/sticking - debris, binding, damaged valve, or scored bore.

P0741 or P0742 - Q8 Control Solenoid Valve Assembly (314) 

TCM incorrectly reporting high OSS, causing early TCC apply or late TCC release.

P0742 - A/Trans Input and Output Speed Sensor Assembly (303) 

Incorrect, high, OSS signal, causing early TCC apply or late TCC release.

P0741 - Control Solenoid Valve Assembly (21) 

A/Trans Fluid Pump Seal Assembly (18) damaged or leaking.

P0741 - Torque Converter Diagnosis 

Refer to No Torque Converter Clutch Apply .

P0742 - Torque Converter Diagnosis 

Refer to No Torque Converter Clutch Release .