2010 Cadillac CTS Sedan AWD V6-3.6L Page 1130
* 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 P182E
- Internal Mode Switch - Invalid Range
DTC P1915
- Internal Mode Switch Does Not Indicate Park/Neutral (P/N) During Start
Diagnostic Fault Information
Typical Scan Tool Data
Circuit/System Description
The manual shift detent lever with shaft position switch assembly or internal mode switch (IMS) assembly is a sliding contact switch attached to the
control valve body within the transmission. The 4 inputs to the transmission control module (TCM) from the switch indicate which position is
selected by the transmission manual shaft. The input voltage at the TCM is high when the switch is open and low when the switch is closed to
ground. The state of each input is displayed on the scan tool as IMS. The IMS input parameters represented are transmission range signal A, Signal
B, signal C, and signal P.
Conditions for Running the DTC
P182E
* The engine speed is greater than 400 RPM for 5 seconds.
* The ignition voltage is greater than 8.6 volts.
* Engine torque signal is valid.
* DTCs P0101, P0102, P0103, P0106, P0107, P0108, P0171, P0171, or P0172 are not set.
P1915
* No OSS DTCs P0722 or P0723 and are not Fault Active or Test Fail this Key ON.
* The transmission output shaft speed is less than 90 RPM or less.
* The ignition voltage is between 6.0 volts and 18.0 volts.
Conditions for Setting the DTC
P182E
The IMS does not indicate a valid Park, Reverse, Neutral or Drive Range gear position for 7 seconds.
