Sunday, November 10, 2019

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2682

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 2682

* 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 P2723

- Clutch Pressure Control (PC) Solenoid 5 - Stuck Off

DTC P2724

- Clutch Pressure Control (PC) Solenoid 5 - Stuck On

Circuit/System Description

The clutch pressure control (PC) solenoid 5 is part of the control solenoid valve assembly, which has no serviceable parts. The PC solenoid 5

regulates transmission fluid pressure to the 1-2-3-4 clutch regulator valve which controls pressure to the 1-2-3-4 clutch. The 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

P2723

* DTCs P0716, P0717, P0722, P0723, P1825, or P1915 are not set.

* The transmission input shaft speed is greater than 60 RPM.

* 1-2-3-4 clutch is commanded ON.

P2724

* DTCs P0716, P0717, P0722, P0723, P1825, or P1915 are not set.

* The transmission input speed is equal to or greater than 200 RPM.

* The transmission output shaft speed is equal to or greater than 200 RPM.

* 1-2-3-4 clutch is commanded OFF.

Conditions for Setting the DTC

P2723

The TCM detects an incorrect on-coming clutch gear ratio, or flare, when the 1-2-3-4 clutch is commanded ON for 0.5 seconds and either fail case

below is achieved:

Condition 1

* Output shaft speed is greater than 60 RPM.

* The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

Condition 2

* Output shaft speed is less than 60 RPM.

* The transmission input shaft speed is greater than 75 RPM from the anticipated input shaft speed.

P2724

The TCM detects an incorrect off-going clutch gear ratio, or tie-up, when the 1-2-3-4 clutch is commanded OFF for 0.5 seconds and the following

is achieved:

* The 1-2-3-4 clutch commanded pressure is 0 kPa for a calculated amount of time.

* The transmission input shaft speed is less than 40 RPM from the anticipated input shaft speed.

* The output shaft speed is greater than 60 RPM.

Action Taken When the DTC Sets

* DTCs P2723 and P2724 are Type A DTCs.

* The TCM freezes transmission adaptive functions.

* DTC P2723 defaults to Reverse, Park, Neutral, 5th, or 6th gear.

* DTC P2724 defaults to Reverse, Park, Neutral, 1st, or 2nd gear.

Conditions for Clearing the DIC/DTC

DTCs P2723 and P2724 are Type A DTCs.

No comments:

Post a Comment