Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure.

The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 2 flows fluid to the 3-5-R clutch when commanded OFF and exhausts fluid when commanded ON. The clutch PC solenoid 2 regulates the transmission fluid pressure to the 3-5-R clutch. The TCM calculates gear ratio based on data from the automatic transmission input speed sensor (ISS) and the output speed sensor (OSS). The TCM compares the known transmission gear ratio to a calculated gear ratio for each commanded gear.

DTC P0776

DTC P0777

DTC P0776

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 3-5-R clutch is commanded ON for 0.5 seconds and the transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

DTC P0777

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 3-5-R clutch is commanded OFF for 0.2 seconds and the transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

DTCs P0776 and P0777 are Type A DTCs.

When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.

Schematic Reference

Automatic Transmission Controls Schematics

Connector End View Reference

DTC Type Reference

Electrical Information Reference

Scan Tool Reference

Special Tools Required

1. Perform the Transmission Fluid Check .
2. Operate the vehicle in drive with the calculated throttle position greater than 15% to obtain 72 km/h (45 mph). Perform this maneuver 2 times.

⇒	If the DTC resets, go to Circuit/System Testing.

1. Perform the Line Pressure Check .

⇒	If the pressure is out of specification, correct this concern first.

2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest the DTC as outlined in the Circuit/System Verification steps.

⇒	If the DTC resets, continue on with testing.

3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .

⇒	If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.

4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .

⇒	If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly.

5. Inspect the control valve upper body assembly for sticking valves, damage, scored bores, or debris.

⇒	If a concern if found in the valve body, repair or replace the valve body as necessary.

6. Inspect the 3-5-R clutch assembly for damage.

⇒	If a concern is found in the 3-5-R clutch assembly, repair or replace as necessary.