6T30/6T40/6T45/6T50 - Automatic Transmission (Gen 2)
DTC P2714 or P2715 (Gen 2)
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 Descriptors
DTC P2714
-
Pressure Control Solenoid Valve 4 Stuck Off
DTC P2715
-
Pressure Control Solenoid Valve 4 Stuck On
Circuit/System Description
The clutch pressure control (PC) solenoid 4 is part of the control solenoid valve assembly which has no serviceable components. The PC solenoid 4 regulates transmission fluid pressure (TFP) to the 2-6 regulator valve which controls pressure to the 2-6 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
P2714
* DTC 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 is not set.
* High side driver (HSD) is enabled.
* Throttle position signal is valid.
* Ignition voltage is 9.0 volts or greater.
* Transmission fluid temperature (TFT) is -7°C (19°F) or greater.
* Engine speed is 400 RPM or greater for 5 seconds.
* 2-6 clutch is commanded ON.
* Output speed is 100 RPM or greater, or the throttle position is greater than 0.5 percent.
P2715
* DTC 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 is not set.
* Ignition voltage is 9.0 volts or greater.
* Transmission output shaft speed is 100 RPM or greater, or throttle position is 0.5 percent or greater.
* 2-6 clutch is commanded OFF.
* TFT is -7°C (19°F) or greater.
* Engine speed is 400 RPM or greater for 5 seconds.
* Engine torque is 45 Nm (33 lb ft).
* The attained range is not 1st gear.
* HSD is enabled.
* Transmission input speed is 200 RPM or greater.
Conditions for Setting the DTC
P2714
TCM detects an incorrect on-coming clutch gear ratio, or shift flare.
P2715
TCM detects an incorrect off-going clutch gear ratio, or shift tie-up.
Action Taken When the DTC Sets
P2714
* DTC P2714 is a Type A DTC.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM inhibits the Tap Up/Tap Down function.
* TCM inhibits manual shifting of forward gears.
* TCM limits the transmission to reverse and 3rd gear.
* TCM inhibits powertrain braking.
* TCM inhibits neutral idle.
* TCM inhibits auto grade braking.
P2715
* DTC P2715 is a Type A DTC.
* TCM commands maximum line pressure.
* TCM freezes transmission adaptive functions.
* TCM inhibits the Tap Up/Tap Down function.
* TCM inhibits manual shifting of forward gears.
* TCM inhibits powertrain braking.
* TCM inhibits auto grade braking.
* TCM inhibits neutral idle.
* TCM commands 2nd gear if the output speed is less than 700 RPM.
* TCM commands neutral if the output speed is 700 RPM or greater.
Conditions for Clearing the DIC/DTC
DTCs P2714 and P2715 are Type A DTCs.
Reference Information
Schematic Reference
* Drive Range, Second Gear (Gen 2/Hybrid) Drive Range, Second Gear (Gen 2/Hybrid)
* Drive Range, Sixth Gear (Gen 2/Hybrid) Drive Range, Sixth Gear (Gen 2/Hybrid)
Description and Operation
* Transmission General Description Transmission General Description
* Transmission Component and System Description Transmission Component and System Description
* Electronic Component Description Electronic Component Description
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
Warning:
Refer to Parking Brake and Drive Wheels Warning Parking Brake and Drive Wheels Warning.
Note:
If other DTCs are set, diagnose those DTCs first.
1. Engine idling in Park, with parking brake applied and drive wheels chocked.
2. Verify correct transmission fluid level and condition. Refer to Transmission Fluid Level and Condition Check 6T30/6T40/6T45/6T50 - Automatic Transmission.
3. Ignition ON, clear the TCM DTCs.
4. Perform the Road Test 6T30/6T40/6T45/6T50 - Automatic Transmission. Verify the transmission operation performs as indicated in the road test instructions and DTC P2714 or P2715 did not set.
• If DTC P2714 or P2715 sets
Refer to Circuit/System Testing below.
• If DTC P2714 or P2715 did not set
5. After performing the above steps, verify that the DTC does not reset by operating the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions you observe from the Freeze Frame/Failure Records data. If the vehicle passes the Circuit/System Verification procedure, then STOP. Do not perform the Circuit/System Testing or Component Testing as this may result in an unnecessary part replacement. Refer to Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections.
Circuit/System Testing
Note:
You must perform the Circuit/System Verification first.
1. Verify the transmission line pressures are within the range specified in the Line PC Solenoid Valve Pressure table. Refer to Line Pressure Check Line Pressure Check and Solenoid Valve Pressure (Gen 2) Solenoid Valve Pressure (Gen 2).
• If the line pressures are not within the specified ranges
Refer to Fluid Pressure High or Low Fluid Pressure High or Low.
• If the line pressures are within the specified ranges
2. Ignition OFF, remove the Q8 control solenoid valve assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement 6T30/6T40/6T45/6T50 - Automatic Transmission.
3. Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test. Test all solenoids on the Q8 control solenoid valve assembly. A pressure change should occur for each solenoid tested.
• If a pressure change does not occur for each solenoid
Replace the Q8 control solenoid valve assembly.
• If a pressure change occurs for each solenoid
4. Listed in the chart below, are conditions for each component that could set DTC P2714 or P2715. Carefully inspect each component for that condition. Repair or replace as necessary.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
Note:
Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection Control Solenoid Valve and Transmission Control Module Assembly Inspection.
* Refer to Control Module References Control Module References for control solenoid valve assembly replacement, programming and setup.
* Perform the Transmission Adaptive Values Learn 6T30/6T40/6T45/6T50 - Automatic Transmission following all transmission related repairs.
* Perform the:
- Internal Components Removal Internal Components Removal
- 2-6 Clutch Piston Removal 2-6 Clutch Piston Removal
- Low and Reverse and 1-2-3-4 Clutch Housing, Low and Reverse Clutch Assembly, Output Sun Gear, and 2-6 Clutch Plate Disassemble (Gen 2) Low and Reverse and 1-2-3-4 Clutch Housing, Low and Reverse Clutch Assembly, Output Sun Gear, and 2-6 Clutch Plate (Gen 2)
- 2-6 Clutch Piston Installation (6T40/45/50) 2-6 Clutch Piston Installation
- 3-5-Reverse and 4-5-6 Clutch Housing, and Input, Reaction, and Output Carrier Installation 3-5-Reverse and 4-5-6 Clutch Housing, and Input, Reaction, and Output Carrier Installation