P07A5
DTC P07A5
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC P07A5
- Transmission Clutch 2 Stuck On
Typical Scan Tool Data
Circuit/System Description
The hybrid/electric vehicle (EV) powertrain control module monitors the Clutch Slip parameters for each Hybrid/EV Transmission Mode Command state. Low clutch slip speed when the clutch is commanded Off indicates a stuck or welded clutch condition. If the hybrid/EV powertrain control module 1 detects a stuck clutch condition, the hybrid/EV powertrain control module 1 will cycle the clutch 3 times within 30 seconds. The customer may feel 3 bumps before the DTC sets.
Conditions for Running the DTC
Variable high and 2-3-4 clutch is commanded Off.
Conditions for Setting the DTC
* Clutch slip is less than 30 RPM 2 times within 20 seconds,
or
* Engine speed is greater than 360 RPM and actual Variable high and 2-3-4 clutch slip speed is below 100 RPM 2 times within 20 seconds.
Action Taken When the DTC Sets
P07A5 is a Type A DTC.
Conditions for Clearing the DTC
P07A5 is a Type A DTC.
Diagnostic Aids
When attempting to set transmission performance DTCs, observe the Freeze Frame and Failure Records to assist in duplicating the failure conditions. Ensure the transmission fluid level is correct and there are no leaks. If there are any other transmission DTCs set, diagnose those first.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Hybrid/EV Battery Pack X1
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information.
Circuit/System Verification
1. Verify that P0721, P0776, P0777, P0966, P0967, P0969, P0970, P0971, P0973, P0974, P0976, P0977, P0AB9, P1B03, P1B04, P215C, P2720, P2721, P2728, P2729, or P2730 is not set.
• If any of the DTCs are set, refer to Diagnostic Trouble Code (DTC) List - Vehicle Diagnostic Trouble Code (DTC) List - Vehicle.
2. Perform the Transmission Fluid Level and Condition Check Testing and Inspection to verify correct fluid level and condition.
• If the transmission fluid is low or discolored, refer to Transmission Fluid Drain and Fill Transmission Fluid Drain and Fill.
3. Operate the vehicle in Single Electric Motor or Single Electric Motor and ICE mode while observing the Clutch 2 Slip Speed parameter. The Clutch 2 Slip Speed parameter should display greater than 30 RPM when the Clutch 2 Status parameter displays Released.
• If the DTC P07A5 is set, go to Component Testing.
Component Testing
1. Perform the Line Pressure Check Line Pressure Check.
• If you found a concern, repair the concern.
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test.
• If a concern is found, replace the Q8 control solenoid valve assembly.
3. Inspect the valve body assembly for sticking or damaged valves. Refer Control Valve Body Diagnostic Inspection Control Valve Body Diagnostic Inspection.
• If you found a concern, repair or replace the valve or valve body.
4. Inspect the variable high and 2-3-4 clutch for a stuck On or damaged condition.
• If you found a variable high and 2-3-4 clutch concern, repair or replace the variable high and 2-3-4 clutch assembly as necessary.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Variable High and 2-3-4 Clutch Hub and Clutch Removal 20. Variable High and 2-3-4 Clutch Hub and Clutch Removal and Variable High and 2-3-4 Clutch and Hub Installation 60. Variable High and 2-3-4 Clutch and Hub Installation for variable high and 2-3-4 clutch replacement or overhaul.
* Control Valve Body Replacement Control Valve Body Replacement for control valve body replacement.
* Perform the valve body inspection procedure, refer to Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection. If the inspection procedure indicates to replace the valve body, refer to Control Valve Body Replacement Control Valve Body Replacement.
* Transmission Replacement Transmission Replacement for transmission removal.
* Control Module References Programming and Relearning for Control Solenoid Valve Assembly and Transmission Control Module Assembly replacement, programming, and setup.
* Perform the Reset Transmission Adapts Programming and Relearning following all transmission related repairs.