2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1994

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1994

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 P2725

- Brake Band Pressure Control Solenoid Valve Control Circuit Shorted

DTC P2728

- Brake Band Pressure Control Solenoid Valve Performance

DTC P2729

- Brake Band Pressure Control Solenoid Valve Control Circuit Low Voltage

DTC P2730

- Brake Band Pressure Control Solenoid Valve Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The shift control solenoid (SLB1) is installed on the front valve body. The solenoid linearly controls hydraulic pressure in response to signals

output from the transmission control module TCM. Through this, the SLB1 controls operating hydraulic pressure to the brake for smooth shifting.

According to each shift control solenoid assembly, the transmission shifts from 1st gear into 6th gear and vice versa. As a fail-safe function, if any

shift control solenoid assembly abnormality occurs, the TCM will disable the current to the solenoids.

Conditions for Running the DTC

P2725

* The ignition voltage is 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* Driving in D range.

* TCM communication is normal.

* DTCs P2729 and P2730 are not set.

P2728

* The ignition voltage is 10.2-15.5 V.

* The engine speed is greater than 400 RPM for 2 s.

* The transmission is not in emergency mode.

* Driving in D range.

* TCM communication is normal.

* The automatic transmission fluid temperature is more than 20掳C (68掳F).

* SLB1 current is more than 0.85 A.

* SLB1 current is not changed.