Circuit Description

The 4-5 shift solenoid (SS) valve is a normally-closed exhaust valve. When the 1-2 and the 2-3 SS valves are both OFF, the 4-5 SS valve turns OFF to shift the transmission into 5th gear. When either of the other two shift solenoids are ON, the 4-5 SS turn OFF in order to enable powertrain braking. The 4-5 SS valve is attached to the control valve body, within the transmission.

The TCM monitors the actual gear ratio, and compares the actual gear ratio with the commanded gear ratio. DTC P0762 sets under two conditions:

• A stuck ON 4-5 SS valve
• A stuck ON 4-5 shift valve

If the TCM detects a 1-2-3-4-4 shift pattern, then DTC P0762 sets. DTC P0762 is a type B DTC.