Tuesday, February 11, 2020

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1703

2010 Cadillac CTS Sedan AWD V6-3.6L Page 1703



Module Assembly Inspection).



3. Place the Q8 control solenoid valve assembly on a clean work surface near the transmission assembly.



4. Connect the DT-47825-10 - jumper harness between the vehicle wire harness electrical connector, and the Q8 control solenoid valve



assembly electrical connector.



5. Ignition ON, verify with a scan tool that each TFP switch parameter changes states when gently pushing on each TFP switch with the eraser



end of a pencil.



瀚慖f any TFP switch parameter does not change states, replace the Q8 control solenoid valve assembly.



Repair Instructions



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



* control solenoid valve assembly replacement. Refer to Control Module References (See: Testing and Inspection/Programming and



Relearning) for replacement, setup, and programming.



* 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.



P0850



DTC P0850-P0852



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 P0850



- Park/Neutral Position (PNP) Switch Circuit



DTC P0851



- Park/Neutral Position (PNP) Switch Circuit Low Voltage



DTC P0852



- Park/Neutral Position (PNP) Switch Circuit High Voltage



Diagnostic Fault Information



Typical Scan Tool Data



Circuit/System Description



The transmission manual shift shaft switch assembly, also known as the internal mode switch (IMS), is a sliding contact switch attached to the



manual shift shaft inside the transmission case. The park/neutral position (PNP) switch is integrated into the IMS and connects to the transmission



control module (TCM) lead-frame through a short wire harness. The circuit uses the TCM as a pass-through connector only.



The Park/Neutral Signal is sent from the park/neutral switch directly to the engine control module (ECM) and is used for engine start enable.



Conditions for Running the DTC



* Ignition voltage is between 11-18 volts.



* Engine Speed is 1000 RPM or greater.

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