Torque Converter Clutch Does Not Engage

Torque converter clutch does not engage

Shift solenoid valve D defective

A/T clutch pressure control solenoid valve C defective

Input shaft (mainshaft) speed sensor defective

Output shaft (countershaft) speed sensor defective

Shift cable broken or out of adjustment

Connection between the shift cable and the transmission or shift lever is worn

Foreign material in separator plate orifice

Torque converter clutch piston defective

Torque converter check valve defective

Lock-up shift valve defective

Lock-up control valve defective

Lock-up timing valve defective

Notes

Check for a stored DTC, and check for loose connections.

Notes

Inspect the shift solenoid valve function with the HDS Shift Solenoid Valve Test, Replacement, And Shift Solenoid Wire Harness Replacement.

Notes

Check for a seized shift solenoid valve, and inspect the O-rings.

Notes

Inspect the A/T clutch pressure control solenoid valve C with the HDS A/T Clutch Pressure Control Solenoid Valve C Test.

Notes

Inspect the A/T clutch pressure control solenoid valve body gasket, the ATF feed pipes, and the O-rings for wear and damage.

Notes

Check for a loose shift cable at the shift lever and the selector control lever.

Notes

Check for a clogged orifice in the separator plate. If the orifice is clogged, remove it, and clean the separator plate orifice.

Notes

Check the speed sensor installation.

Notes

Inspect the sensor and O-ring for wear and damage.

Notes

Check the line pressure A/T Pressure Test.

Notes

Replace the torque converter.

Notes

Check the torque converter check valve and lock-up shift valve in the main valve body for free movement, and check the valve springs for wear and damage.

Notes

Check the lock-up control valve in the regulator valve body for free movement, and check the valve spring for wear and damage.