2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1768
Condition 1
The transmission direction, indicated by both the IMS range and direction switch circuits, are valid but do not match.
Condition 2
* One IMS direction switch circuit has failed.
* The HPCM calculates a transmission direction base upon the remaining IMS direction circuits.
* The calculated HPCM transmission direction does not match the direction indicated by the IMS range switch circuits.
Condition 3
* One IMS direction switch circuit has failed.
* The HPCM calculates a transmission direction based upon the remaining IMS direction circuits.
* The IMS range switch indicated a transitional position.
Condition 4
* One IMS direction switch circuit has failed.
* The HPCM calculates a transmission direction based upon the remaining IMS direction circuits.
* The TCM has indicated at least one IMS range switch circuit has failed.
Condition 5
* More than one IMS direction circuit has failed and the HPCM cannot calculate a transmission direction.
* The IMS range switch indicates a transitional position.
Condition 6
* More than one IMS direction circuit has failed and the HPCM cannot calculate a transmission direction.
* The TCM has indicated at least one IMS range switch circuit has failed.
Action Taken When the DTC Sets
* DTC P16F4 is a Type A DTC.
* The HPCM commands the battery energy control module (BECM) to open the high voltage contactor relays.
Conditions for Clearing the DTC
DTC P16F4 is a Type A DTC.
Diagnostic Aids
If IMS circuit DTCs P181C-P181F, P183A-P183F, P184A or P184B are set, perform those diagnostics first.
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)
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code
(DTC) Type Definitions)
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information
Special Tools
* DT-47825-10 Jumper Harness
* DT-48493 Jumper Harness
