• | 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
• | Circuit Testing |
• | Wiring Repairs |
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. |