2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1647
* Control Valve Lower Body and Upper Body Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve
Body/Service and Repair/6T70/6T75 - Automatic Transmission/Control Valve Lower Body and Upper Body Replacement)
* Low and Reverse Clutch and 1-2-3-4 Clutch Plate Removal (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service
and Repair/Overhaul/8. Low and Reverse Clutch and 1-2-3-4 Clutch Plate Removal) and 3-5-Reverse and 4-5-6 Clutch Housing Disassemble
(See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/41. 3-5-Reverse and 4-5-6 Clutch
Housing Disassemble)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,
setup, and programming
P0797
DTC P0796 or P0797
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC P0796
- Clutch Pressure Control (PC) Solenoid 3 - Stuck Off
DTC P0797
- Clutch Pressure Control (PC) Solenoid 3 - Stuck On
Circuit/System Description
The clutch pressure control (PC) solenoid 3 is part of the control solenoid valve assembly, which has no serviceable components. The PC solenoid
3 regulates transmission fluid pressure (TFP) to the R1/4-5-6 clutch regulator valve which controls pressure to the low and reverse clutch and the
4-5-6 clutch. The transmission control module (TCM) calculates gear ratio based on the RPM signals from the input speed sensor (ISS) and the
output speed sensor (OSS). The TCM compares the expected transmission gear ratio to the calculated gear ratio for each commanded gear.
Conditions for Running the DTC
P0796 or P0797
* No ISS DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206,
P0207, P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401, P042E, P0716, P0717, P0722, P0723, or P182E.
* The ignition voltage is greater than 8.6 volts.
* The engine speed is greater than 400 RPM for 5 seconds.
* The output speed is 16 RPM or greater, or the throttle position is 0.4 percent or greater.
* The throttle position signal is valid.
* The high side driver is commanded on.
* The transmission fluid temperature is 0掳C (32掳F) or greater.
Conditions for Setting the DTC
P0796
The TCM detects an incorrect ON-coming clutch gear ratio or shift flare when the R1 or 4-5-6 clutch is commanded on.
P0797
The TCM detects an incorrect OFF-going clutch gear ratio or shift tie-up when the R1 or 4-5-6 clutch is commanded off.
Action Taken When the DTC Sets
P0796
* DTC P0796 is a Type A DTC.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCM inhibits Tap Up/Down function.
* The TCM inhibits manual shifting of forward gears.
* The TCM limits the transmission to 1st, 3rd, or reverse operation.
