2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1916

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1916

Circuit/System Description

The internal mode switch (IMS) assembly is a sliding contact switch attached to the control valve body within the transmission. The nine outputs

from the switch indicate which position is selected by the transmission manual shaft. Four outputs (A, B, C, P), are range selection inputs to the

transmission control module (TCM). Five outputs (R1, R2, D1, D2, S) are direction selection inputs to the hybrid powertrain control module

(HPCM). The input voltage at the module is high when the switch is open and low when the switch is closed to ground.

Conditions for Running the DTC

* The ignition is ON.

* Ignition voltage is greater than 6.0 volts.

Conditions for Setting the DTC

The IMS Direction Signal state does not match for the selected gear for 3 seconds.

Action Taken When the DTC Sets

DTCs P181C, P181D, P181E, P181F, P183A, P183B, P183C, P183D, P183E, P184A and P184B are Type B DTCs.

Conditions for Clearing the DTC

DTCs P181C, P181D, P181E, P181F, P183A, P183B, P183C, P183D, P183E, P184A and P184B are Type B DTCs.

Diagnostic Aids

* The direction IMS assembly can be damaged by electric current exceeding 25 mA. Test the IMS assembly for an open condition whenever a

short to voltage condition is observed.

* The direction IMS is a non-serviceable part of the manual shift shaft position switch.

Reference Information

Schematic Reference

Hybrid Controls Schematics ()

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Electrical Information Reference

* Circuit Testing (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Circuit

Testing/Circuit Testing)

* Connector Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic

Procedures/Connector Repairs/Connector Repairs)

* Testing for Intermittent Conditions and Poor Connections (See: Testing and Inspection/Component Tests and General Diagnostics/General

Electrical Diagnostic Procedures/Circuit Testing/Testing for Intermittent Conditions and Poor Connections)

* Wiring Repairs (See: Testing and Inspection/Component Tests and General Diagnostics/General Electrical Diagnostic Procedures/Wiring

Repairs/Wiring Repairs)