Sunday, November 10, 2019

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2720

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2720

DTC P3425

- Cylinder 4 Deactivation Solenoid Control Circuit

DTC P3441

- Cylinder 6 Deactivation Solenoid Control Circuit

DTC P3449

- Cylinder 7 Deactivation Solenoid Control Circuit

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The cylinder deactivation system is used to deactivate 4 cylinders of the engine under light load driving conditions. The engine control module

(ECM) commands the cylinder deactivation solenoids ON to deactivate engine cylinders 1, 7, 6, and 4, switching to 4 cylinders or V4 mode. The

cylinder deactivation solenoids controls the oil flow to the appropriate valve lifters. The engine operates on 8 cylinders or V8 mode, during engine

starting, engine idling, and medium to heavy throttle conditions.

Ignition voltage is supplied directly to the 4 cylinder deactivation solenoids. The engine control module (ECM) controls the 4 cylinder deactivation

solenoids by grounding the control circuit with a solid state device called a driver.

Conditions for Running the DTC

* The engine speed is greater than 400 RPM.

* The ignition voltage is between 9-18 volts.

* DTC P3401, P3425, P3441, and P3449 runs continuously when the above conditions are met.

Conditions for Setting the DTC

No comments:

Post a Comment