2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 2462
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.
P1915
The manual shift shaft IMS switch assembly does not indicate Park or Neutral during the following sequence:
* The engine speed is less than 50 RPM for more than 0.15 seconds.
* The engine speed is 50-480 RPM for more than 0.07 seconds.
* The engine speed is greater than 525 RPM for more than 3.25 seconds.
* The transmission input shaft speed is 200 RPM or greater.
Action Taken When the DTC Sets
* DTCs P182E and P1915 are Type A DTCs.
* The TCM commands maximum line pressure.
* The TCM turns off all solenoids - HSD1 and HSD2.
* The TCM freezes transmission adaptive functions.
* The TCM defaults the transmission to third gear if the current gear is 1st, 2nd, or 3rd; or fifth gear if the current gear is 4th, 5th, or 6th gear.
* The TCM inhibits TCC.
* The TCM inhibits Tap up and Tap down functions.
Conditions for Clearing the DTC
DTCs P182E and P1915 are Type A DTCs.
Reference Information
Schematic Reference
Automatic Transmission Controls Schematics (See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Diagrams)
Connector End View Reference
* Component Connector End Views (See: Diagrams/Connector Views)
