2010 Cadillac CTS Sedan AWD V6-3.0L Page 1724

2010 Cadillac CTS Sedan AWD V6-3.0L Page 1724

* Shift Solenoid Valve 1 Control Circuit High Voltage Test Status

* Shift Solenoid Valve 1 Control Circuit Open Test Status

* Shift Solenoid Valve 1 Control 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.

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

Inspection/Programming and Relearning/Service Fast Learn Adapts) following all transmission related repairs.

* Before replacing the TCM, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection (See: Transmission

and Drivetrain/Automatic Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/Control Solenoid Valve

and Transmission Control Module Assembly Inspection).

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

setup, and programming.

P0974

DTC P0973 or P0974

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 P0973

- Shift Solenoid (SS) 1 Control Circuit Low Voltage

DTC P0974

- Shift Solenoid (SS) 1 Control Circuit High Voltage

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The shift solenoid (SS) 1 is part of the control solenoid valve assembly which has no serviceable parts. SS 1 is a normally closed (NC) ON/OFF

solenoid and is controlled by the TCM through a low side driver. When the SS 1 is energized (ON), SS 1 fluid pressure is directed to the clutch

select valve 2. Power to the SS 1 is supplied by the TCM through a high side driver (HSD). The HSD protects the circuit and components from

excessive current flow. If excessive current flow is detected, the HSD will turn OFF. When the fault is corrected, the HSD will reset.

Conditions for Running the DTC