2010 Cadillac Truck SRX FWD V6-3.0L Page 1907
P1751
DTC P1751
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 Descriptor
DTC P1751
- Shift Valve 1 Performance
Circuit/System Description
The shift solenoid (SS) 1 is part of the control solenoid valve assembly, which has no serviceable components. SS 1 provides fluid pressure to
control the operation of the clutch select valve 2, which is located in the control valve lower body assembly. SS 1, in conjunction with clutch select
valve 2, controls the pressure path to the reverse and low clutch and 4-5-6 clutch. A diagnostic test is performed by the transmission control module
(TCM) to determine the state of the clutch select valve 2. During this diagnostic test, the TCM commands the SS 1 ON, supplying pressure to move
the clutch select valve 2 toward its spring. At the same time, line pressure is elevated slightly to assist the spring side pressure. If the spring is
broken, or the clutch select valve 2 cannot move due to another mechanical condition, the DTC will set.
Conditions for Running the DTC
* No DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0172, P0174, P0175, P0201, P0202, P0203, P0204, P0205, P0206, P0207,
P0208, P0300, P0301, P0302, P0303, P0304, P0305, P0306, P0307, P0308, P0401, P042E, P0716, P0717, P0722, P0723, P0741, P0742,
P1751, P2763, or P2764.
* Current gear is not 2nd.
* The engine speed is greater than 400 RPM for greater than 5 seconds.
* The ignition voltage is 8.6 volts or greater.
* The transmission fluid temperature (TFT) is 20-130掳C (68-266掳F).
* The calc. throttle position is 8 percent or greater.
* The engine torque is greater than 80 Nm (59 lb ft).
* The transmission input speed is greater than 1200 RPM.
* No upshift or downshift in process.
Conditions for Setting the DTC
The TCM detects attained gear slip is 100 RPM or greater for 1 second.
Action Taken When the DTC Sets
DTC P1751 is a Type B DTC.
Conditions for Clearing the DTC
DTC P1751 is a Type B DTC.
Diagnostic Aids
Before performing a road test, configure and setup the scan tool for snapshot mode. This will allow you to display, monitor, and verify multiple
transmission data parameters at one time, after the road test.
Reference Information
Description and Operation
Transmission General Description (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and Operation/6T70/6T75 -
Automatic Transmission/Transmission General Description)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
