2010 Cadillac Truck SRX FWD V6-3.0L Page 1799

2010 Cadillac Truck SRX FWD V6-3.0L Page 1799

DTC P0748 or P0961-P0963

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 P0748

- Line Pressure Control Solenoid Valve System Performance

DTC P0961

- Line Pressure Control Solenoid Valve System Performance

DTC P0962

- Line Pressure Control Solenoid Valve Control Circuit Low Voltage

DTC P0963

- Line Pressure Control Solenoid Valve Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

Line pressure control solenoid (SLT) is part of the front valve body. SLT regulates the transmission fluid line pressure in accordance with the value

decided in the transmission control module (TCM) based on throttle opening signal and engine torque. Through this, it controls operating hydraulic

pressure to the clutch and brakes for smooth shifting. The TCM varies the current to the normally SLT from 0.1 A for maximum line pressure, to

1.1 A for minimum line pressure. As a fail-safe function, if SLT abnormality occurs, the TCM will disable the current. In that case the line pressure

is maximized.

Conditions for Running the DTC

P0748

* 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 P0962 and P0963 are not set.

P0961

* 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)