• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The clutch pressure control (PC) solenoid 2 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. PC solenoid 2 controls transmission fluid pressure to the hybrid direct, 2-3-4 clutch regulator valve. When PC solenoid 2 is commanded ON, the TCM compares the known transmission fluid pressure (TFP) switch 3 state with the actual TFP switch 3 state. Depending one the commanded mode or gear, the clutch PC solenoid 2 controls fluid pressure to the following components:
In the ON position, PC solenoid 2 controls transmission fluid to the following components:
• | EVT 1 mode, oil is supplied to drive motors 1 and 2 for cooling and the hybrid low, 1-2 clutch. |
• | EVT 2 mode, oil is supplied to drive motors 1 and 2 for cooling and the hybrid direct, 2-3-4 clutch. |
• | Gear 1, oil is supplied to the hybrid low, 1-2 clutch and the 1-3 clutch. |
In the ON position, PC solenoid 2 controls the transmission fluid to the following components:
• | Gear 2, oil is supplied to the hybrid low, 1-2 clutch and the hybrid direct, 2-3-4 clutch. |
• | Gear 3, oil is supplied to the hybrid direct, 2-3-4 clutch and the 1-3 clutch. |
• | Gear 4, oil is supplied to the hybrid direct, 2-3-4 clutch and the 4th clutch. |
• | The engine run time is greater than 1 second. |
• | Shift solenoid (SS) valve 1 is not in a transition state. |
• | The transmission line pressure is greater than 370 kpa (54 psi) and not fluctuating by greater than 30 kpa (4 psi). |
• | Propulsion is active. |
The clutch PC solenoid 2 commanded pressure is greater than 1800 kpa (261 psi) for 4.5 seconds.
The clutch PC solenoid 2 commanded pressure is less than 5 kpa (1 psi) for 4.5 seconds.
The clutch PC solenoid 2 commanded pressure is 1800 kpa (261 psi) and the TFP switch 2 state is Low for 30 seconds.
The clutch PC solenoid 2 commanded pressure is 1800 kpa (261 psi) and the TFP switch 2 state is Low for 0.5 seconds greater than 5 times during a key cycle.
The clutch PC solenoid 2 commanded pressure is 5 kpa (1 psi) and the TFP switch 2 state is High for 36 seconds.
The clutch PC solenoid 2 commanded pressure is 5 kpa (1 psi) and the TFP switch 2 state is High for 1.25 seconds greater than 5 times during a key cycle.
• | P0776 and P0777 are Type B DTCs. |
• | The TCM commands maximum line pressure. |
• | The TCM freezes transmission adaptive functions. |
P0776 and P0777 are Type B DTCs.
When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions.
Automatic Transmission Controls Schematics
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Control Module References for scan tool information.
DT-47825 Control Solenoid Test Plate Kit
⇒ | If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle. |
⇒ | If the DTC resets, go to Circuit/System Testing. |
⇒ | If the pressure is out of specification, correct this concern first. |
⇒ | If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly. |
⇒ | If the solenoid is found to be leaking or stuck closed, replace the control solenoid (w/body and TCM) valve assembly. |
⇒ | If a concern is found in the valve body, repair or replace the valve body as necessary. |
⇒ | If a concern is found in the hybrid direct, 2-3-4 clutch assembly, repair or replace as necessary. |
Operating Conditions | Normal Operation | Stuck OFF | Stuck ON |
---|---|---|---|
Steady State Gears 3 | 3 | Neutral | 3 |
Steady State Gears 1, 2, 4 | 1, 2, 4 | 1, 2, 4 | 3 |
Garage Shift | Park/Neutral to Reverse/Drive | Neutral | 1 Drive Gear |
Downshift from gears 4 to 3 | 3 | Neutral | 3 |
Upshift from gears 3 to 4 | 4 | 4 | 3 |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Hybrid Direct, 2-3-4 Clutch Housing Overhaul for hybrid direct, 2-3-4 clutch assembly replacement. |
• | Control Module References for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming. |