2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1618
Tests and General Diagnostics/2ML70 - Automatic Transmission/Line Pressure Check) to verify correct fluid pressure.
3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission and Drivetrain/Automatic
Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic Transmission/Control
Solenoid Valve and Transmission Control Module Assembly Inspection) to verify control solenoid valve assembly condition.
4. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test (See: Transmission and
Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/2ML70 - Automatic
Transmission/Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test) to verify control solenoid
valve assembly functional testing.
5. Inspect the hybrid low, 1-2 clutch boost valve assembly and the hybrid low, 1-2 clutch regulator valve assembly for sticking or damage.
瀚慖f you found a concern with the hybrid low, 1-2 clutch boost valve assembly or the hybrid low, 1-2 clutch regulator valve assembly,
repair or replace the valve or valve body.
6. Inspect the 4th clutch assembly for a stuck ON or damaged condition.
瀚慖f you found a 4th clutch assembly concern, repair or replace the low and reverse clutch assembly as necessary.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Control Valve Assembly Disassemble (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and
Repair/Overhaul/2ML70 - Automatic Transmission/54. Control Valve Assembly Disassemble) for valve body inspection procedures.
* Control Valve Upper Body Replacement (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and
Repair/2ML70 - Automatic Transmission) for control valve body replacement.
* 4th Clutch Piston Removal (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/2ML70 -
Automatic Transmission/10. 4th Clutch Piston Removal) for 4th clutch removal and inspection.
* 4th Clutch Piston Installation (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Overhaul/2ML70 -
Automatic Transmission/35. 4th Clutch Piston Installation) for 4th clutch assembly repair or replacement.
* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,
setup, and programming.
P07A9
DTC P07A9
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 Descriptor
DTC P07A9
- Transmission Clutch 4 Stuck On
Circuit/System Description
The hybrid powertrain control module monitors the clutch slip speed for each Hybrid Trans. Mode Commanded state. This DTC detects no clutch
slip when the 1-3 clutch is commanded OFF, indicating a stuck or welded clutch condition. The 1-3 clutch is displayed as Clutch 4 on the scan tool.
Conditions for Running the DTC
* The 1-3 clutch is the primary off-going clutch.
* The Hybrid Trans. Mode Commanded is not gear 1 or gear 3.
* The Calc. Trans Input Speed is greater than 250 RPM.
Conditions for Setting the DTC
Fail Case 1
The 1-3 clutch is commanded OFF for 3 seconds and the hybrid powertrain control module detects the 1-3 clutch slip speed is less than 100 RPM
for 0.25 seconds, when commanded OFF in EVT 1 mode.
