P0762

Steps 1-4:

Steps 5-6:

DTC P0762
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.

Conditions for Running the DTC
^ No throttle system DTC'S P1791 or P1795.
^ No OSS DTC'S P0722 or P0723.
^ No ISS DTC'S P0716 or P0717.
^ No IMS DTC'S P1815, P1818, P1820, P1822, P1823, P1825 or P1826.
^ No shift solenoid electrical DTC'S P1842, P1843, P1845, P1847, P1864, or P1865.
^ No TCC performance DTC P0742.
^ No engine delivered torque signal DTC P1779.
^ The ignition voltage is 8 - 18 volts.
^ The engine run time is greater than 5 seconds.
^ The IMS indicates D2, D3,D4, or D5.
^ The transmission fluid temperature is 20 - 130°C (68 - 266°F).
^ The Accelerator Pedal Position (APP) is greater than 10 percent.
^ The input shaft speed is 200 - 6,800 RPM.
^ The output shaft speed is greater than 100 RPM.

Conditions for Setting the DTC
The following conditions must occur twice during the same trip:
^ The TCM has commanded either 2nd or 3rd gear for 4 seconds or greater.
^ The TCM commands 5th gear.
^ The engine torque is 36 - 350 Nm (27 - 258 ft. lbs.).
^ The resulting gear ratio is 0.98:1 - 1.03:1 for 3.5 seconds.

Action Taken When the DTC Sets
^ The TCM requests the ECM to illuminate the Malfunction Indicator Lamp (MIL) during the second consecutive trip in which the Conditions for Setting the DTC are met.
^ The TCM turns off the pressure control solenoid. When the pressure control solenoid is off, line pressure is at maximum and updates to the Transmission Adaptive Pressure (TAP) memory cells are discontinued.
^ The TCM inhibits 5th gear.
^ At the time of the first failure, the TCM records the operating conditions when the Conditions for Setting the DTC are met. The TCM stores this information as a Failure Record.
^ At the time of the second failure, the ECM records the operating conditions when the Conditions for Setting the DTC are met. The ECM stores this information as a Freeze Frame.
^ The TCM stores DTC P0762 in TCM history.

Conditions for Clearing the DTC
^ The ECM turns OFF the MIL after the sixth consecutive drive trip in which the TCM does not send a MIL illumination request.
^ A scan tool can clear the DTC.
^ The TCM clears the DTC from TCM history if the vehicle completes 40 warm-up cycles without a non emission related diagnostic fault occurring.
^ The TCM cancels the DTC default actions when the ignition is OFF long enough in order to power down the TCM.

Diagnostic Aids
^ If you clear DTC P0762, and then cannot reset DTC P0762, the following conditions may exist:
- Fluid contamination
- Plugged fluid circuits
- Restricted fluid circuits

^ Refer to Shift Solenoid Valve State and Gear Ratio.

Test Description
The numbers below refer to the step numbers on the diagnostic table.
3. This step verifies a 1-2-3-4-4 shift pattern.
4. This step tests for a mechanical or hydraulic condition causing the 4-5 SS valve to be stuck ON, or the circuit to be released.