Test A: Shift and Torque Converter Clutch (TCC) Solenoids

Pinpoint Tests - OSC Equipped Vehicles
Anytime an electrical connector or solenoid body is disconnected, inspect the connector for terminal condition, corrosion and contamination. Also inspect the connector seal for damage. Clean, repair or install a new connector as required.

Shift Solenoid Pre-Diagnosis
Use the shift solenoid operation information while carrying out Pinpoint Test A.

Solenoid Operation Chart:

Shift Solenoid Failure Mode Chart Always On
Failed OFF due to powertrain control module (PCM) and/or vehicle wiring concerns, solenoid electrically, mechanically or hydraulically stuck ON.

Shift Solenoid Failure Mode Chart Always On (Part 1):

Shift Solenoid Failure Mode Chart Always On (Part 2):

Shift Solenoid Failure Mode Chart Always On (Part 3):

Shift Solenoid Failure Mode Chart Always On (Part 4):

Shift Solenoid Failure Mode Chart Always On (Part 5):

Shift Solenoid Failure Mode Chart Always Off
Failed ON due to powertrain control module (PCM) and/or vehicle wiring concerns, solenoid electrically, mechanically or hydraulically stuck OFF.