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2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1653

2010 Cadillac Truck SRX AWD V6-2.8L Turbo Page 1653



瀚慖f less than the specified range, replace the wiring harness.



4. If all circuit test normal, perform the Control Solenoid Valve Inspection (M36 and MXE) (See: Transmission and Drivetrain/Automatic



Transmission/Transaxle/Testing and Inspection/Component Tests and General Diagnostics/AF40-6 - Automatic Transmission).



瀚慖f the inspection test normal, replace the control valve body.



Repair Instructions



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



* Control valve body replacement-Refer to Control Valve Body Replacement (See: Transmission and Drivetrain/Automatic



Transmission/Transaxle/Valve Body/Service and Repair/AF40-6 - Automatic Transmission/Control Valve Body Replacement) for



replacement, setup and programming.



* TCM-Refer to Control Module References (See: Testing and Inspection/Programming and Relearning) for replacement, setup and



programming.



* Perform the Transmission Adaptive Functions (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Description and



Operation/AF40-6 - Automatic Transmission/Transmission Adaptive Functions).



* Wiring harness-Refer to Automatic Transmission Wiring Harness Replacement (See: Transmission and Drivetrain/Automatic



Transmission/Transaxle/Wiring Harness/Service and Repair) for replacement.



P0815



DTC P0815, P0816, or P0826



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 P0815



- Upshift Switch Circuit



DTC P0816



- Downshift Switch Circuit



DTC P0826



- Up and Down Shift Switch Circuit



Diagnostic Fault Information



Circuit/System Description



When the shift lever is placed in manual mode (M) this activates the driver shift request (DSR), also known as the tap shift function. The DSR



allows the vehicle operator to shift gears by pressing the plus (+) button for an upshift or the minus (-) button for a downshift. A 12 volt signal



circuit is provided by the body control module (BCM) to the plus or minus buttons. When a plus or minus button is pressed, a corresponding



voltage drop occurs across the resistor network embedded in the switches. This voltage drop is monitored by the transmission control module



(TCM). The TCM will command the upshift or downshift providing the operating conditions are correct.



Conditions for Running the DTC



P0815 or P0816



* No DTCs P0815, P0816, P0826, P1761, P182E, P1876, P1877, or P1915.



* The time since the range change is greater than 1 second.



* The engine speed is 400 RPM or greater for 5 seconds.

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