Operation CHARM: Car repair manuals for everyone.
Home >> Chevrolet >> 2011 >> Cruze L4-1.8L >> Repair and Diagnosis >> A L L Diagnostic Trouble Codes ( DTC ) >> Testing and Inspection >> P Code Charts >> P2729

P2729




DTC P2728-P2730

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 P2728
- Pressure Control Solenoid Valve 5 System Performance

DTC P2729
- Pressure Control Solenoid Valve 5 Control Circuit Low Voltage

DTC P2730
- Pressure Control Solenoid Valve 5 Control Circuit High Voltage

Diagnostic Fault Information





Typical Scan Tool Data














Circuit/System Description

The clutch pressure (PC) solenoid 5 is part of the control solenoid valve assembly which has no serviceable components. The normally low clutch PC solenoid 5 regulates and directs the clutch PC solenoid 5 oil pressure to the 1-2-3-4 clutch regulator valve. Increasing clutch PC solenoid 5 pressure increases pressure to the 1-2-3-4 clutch. The transmission control module (TCM) varies the current to the PC solenoid 5 through a low side driver. Increasing the current to the clutch PC solenoid 5 increases clutch PC solenoid 5 oil pressure by closing OFF the solenoid exhaust port. Decreasing the current to the clutch PC solenoid 5 decreases clutch PC solenoid 5 oil pressure by opening the solenoid exhaust port. Clutch PC solenoid 5 power is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.

Conditions for Running the DTC

P2728, P2729, or P2730
* The engine speed is 400 RPM or greater for 5 seconds.
* The ignition voltage is 9.0 volts or greater.

Conditions for Setting the DTC

P2728

The TCM detects an internal electrical performance malfunction of the clutch PC solenoid 5 control circuit where the measured clutch PC solenoid 5 current does not equal the commanded clutch PC solenoid 5 current for 5 seconds.

P2729

The TCM detects a short to ground on the clutch PC solenoid 5 control circuit for 1 second.

P2730

The TCM detects an open or short to voltage on the clutch PC solenoid 5 control circuit for 1 second.

Action Taken When the DTC Sets

P2728
* DTC P2728 is a Type C DTC.
* The TCM freezes transmission adaptive functions on the 1-2-3-4 clutch.

P2729
* DTC P2729 is a Type A DTC.
* The TCM limits the transmission to 3rd gear and reverse.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.
* The TCM inhibits Tap Up/Tap Down.
* The TCM inhibits manual up, manual down with the shift selector.

P2730
* DTC P2730 is a Type A DTC.
* The TCM forces the High Side Driver OFF.
* The TCM limits the transmission to reverse and 5th gear.
* The TCM Forces TCC OFF.
* The TCM enables torque management.
* The TCM inhibits Tap Up/Tap Down function.
* The TCM inhibits manual shifting of forward gears.
* The TCM commands maximum line pressure.
* The TCM freezes transmission adaptive functions.

Conditions for Clearing the DTC

* DTC P2728 is a Type C DTC.
* DTCs P2729 and P2730 are Type A DTCs.

Reference Information
Schematic Reference

Automatic Transmission Controls Schematics (Electrical Diagrams)
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)

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
Special Tools

DT-48616-10 - Adapter Harness

For equivalent regional tools, refer to Special Tools (Tools and Equipment).

Circuit/System Verification

1. Operate the vehicle in second gear long enough to ensure at least a 3°C (5°F) rise in TCM temperature, then operate the vehicle in PARK for 5 seconds.
2. Operate the vehicle in drive range. Allow the transmission to shift through all forward gear ranges. Verify with a scan tool, the following test status parameters display OK.

* Pressure Control Solenoid Valve 5 Performance Test Status
* Pressure Control Solenoid Valve 5 Control Circuit High Voltage Test Status
* Pressure Control Solenoid Valve 5 Control Circuit Low Voltage Test Status

3. Operate the vehicle within the Conditions for Running the DTC to verify the DTC does not reset. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.

Circuit/System Testing

Note: You must perform the Circuit/System Verification first.

1. Ignition OFF, remove the control solenoid assembly. Refer to Control Solenoid Valve and Transmission Control Module Assembly Replacement (Service and Repair).
2. Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (Control Solenoid Valve and Transmission Control Module Assembly Inspection).
3. Place the control solenoid valve assembly on a clean work surface near the transmission assembly.
4. Connect DT-48616-10 - harness between the vehicle wire harness electrical connector, and the control solenoid valve assembly electrical connector.
5. Ignition ON, verify with a scan tool the following test status parameters display OK.

* Pressure Control Solenoid Valve 5 Performance Test Status
* Pressure Control Solenoid Valve 5 Control Circuit High Voltage Test Status
* Pressure Control Solenoid Valve 5 Control Circuit Low Voltage Test Status

• If any test status parameter displays Fault or Malfunction, replace the control solenoid valve assembly.

Repair Instructions

Perform the Diagnostic Repair Verification (Verification Tests) after completing the diagnostic procedure.

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 (Programming and Relearning) for control solenoid valve assembly replacement, setup, and programming.
* Perform the Transmission Adaptive Values Learn (Programming and Relearning) following all transmission related repairs.
* Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning (Control Solenoid Valve and Transmission Control Module Assembly Cleaning) procedure.

pro multis · About Operation CHARM