2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2587

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 2587

* High Side Driver 1 Circuit Low Voltage Test Status

瀚慖f any test status parameter displays Fault or Malfunction, replace the Q8 control solenoid valve assembly.

Repair Instructions

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

* Control Module References (See: Testing and Inspection/Programming and Relearning) for control solenoid valve assembly replacement,

setup, and programming.

* Perform the Service Fast Learn Adapts (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Testing and

Inspection/Programming and Relearning) following all transmission related repairs.

P0659

DTC P0658 or P0659

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 P0658

- Solenoid High Control Circuit Group 1 Low Voltage

DTC P0659

- Solenoid High Control Circuit Group 1 High Voltage

Diagnostic Fault Information

Circuit/System Description

The transmission control module (TCM) high side driver 1 is located inside of the control solenoid valve assembly which has no serviceable parts.

The high side driver 1 provides power to the TCM pressure control solenoids and shift solenoids. This fault is handled inside the TCM and no

external circuits are involved.

Conditions for Running the DTC

P0658

* The engine speed is greater than 500 RPM for 5 seconds.

* Ignition voltage is 8.6 volts or greater.

* High side driver 1 is enabled.

* DTC P0658 has not set this ignition.

P0659

* DTC P0659 has not set this ignition.

* Ignition voltage is 8.6 volts or greater.

* Ignition switch transitions from OFF to run position.

Conditions for Setting the DTC

P0658

The TCM detects an internal open or short to ground on the high side driver 1 for 1 second.

P0659

The TCM detects an internal short to voltage on the high side driver 1 circuit for 1 second after engine start.

Action Taken When the DTC Sets