• | 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 4 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The clutch PC solenoid 4 flows fluid to the 2-6 clutch when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 4 regulates the transmission fluid pressure to the 2-6 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.
• | No ISS DTCs P0716 or P0717. |
• | No OSS DTCs P0722 or P0723. |
• | No IMS DTCs P1825 or P1915. |
• | The transmission input shaft speed is 60 RPM or greater. |
• | 2-6 clutch is commanded ON. |
• | The transmission output shaft speed is 200 RPM or greater. |
• | 2-6 clutch is commanded OFF. |
The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 2-6 clutch is commanded ON for 2.25 seconds and the transmission input shaft speed is 100 RPM or greater from the anticipated input shaft speed.
The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 2-6 clutch is commanded OFF for 1.2 seconds and the transmission input shaft speed is 40 RPM or less from the anticipated input shaft speed.
• | DTCs P2714 and P2715 are Type A DTCs. |
• | The TCM commands maximum line pressure. |
• | The TCM inhibits TCC. |
• | The TCM freezes transmission adaptive functions. |
DTCs P2714 and P2715 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.
Automatic Transmission Controls Schematics
• | DT-47825 Control Solenoid Test Plate |
• | DT-47825-10 Jumper Harness |
Important: Before clearing the DTC, use the scan tool in order to record the Freeze Frame and Failure Records.
⇒ | If the DTC resets, go to Circuit/System Testing. |
⇒ | If the pressure is out of specification, correct this concern first. |
⇒ | If the DTC resets, continue on with testing. |
⇒ | 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 if found in the valve body, repair or replace the valve body as necessary. |
⇒ | If a concern is found in the 2-6 clutch assembly, repair or replace as necessary. |
Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
Operating Conditions | Normal Operation | Stuck OFF | Stuck ON |
---|---|---|---|
Steady State Gears 2, 6 | 2, 6 | Neutral | 2, 6 |
Steady State Gears 1, 3, 4, 5 | 1, 3, 4, 5 | 1, 3, 4, 5 | 2, 6 |
Garage Shift | Park/Neutral to Reverse/Drive | Drive Gear | Drive Gear |
Downshift from gears 3, 4, 5 to 2 | 2 | Neutral | 2, 6 |
Upshift from gears 2 to 3, 4, 5 | 3, 4, 5 | 3, 4, 5 | 2, 6 |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control valve body replacement - refer to Control Valve Lower Body and Upper Body Replacement . |
• | 2-6 clutch assembly repair or replacement - refer to Reaction Carrier Hub and 2-6 Clutch Plate Removal . |
• | Control solenoid (w/body and TCM) valve assembly replacement - refer to Control Module References for replacement, setup, and programming. |
• | Perform the Service Fast Learn Adapts . |