P074C Unable to engage 4GR
Description
This malfunction is detected when the A/T does not shift into 4GR position as
instructed by TCM. This is not
only caused by electrical malfunction (circuits open or shorted) but by
mechanical malfunction such as control
valve sticking, improper solenoid valve operation, etc.
DTC ...
Lock-up control
LOCK-UP CONTROL : System Description
SYSTEM DIAGRAM
DESCRIPTION
Controls for improvement of the transmission efficiency by engaging the
torque converter clutch in the
torque converter and eliminating slip of the converter. Achieves comfortable
driving with slip control of the
t ...