2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 343
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Transfer Case Shift Control Switch Replacement (Without SLT) (See: Powertrain Management/Transmission Control Systems/Sensors and
Switches - Transmission and Drivetrain/Sensors and Switches - Transfer Case/Four Wheel Drive Selector Switch/Service and Repair)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for TCSCM replacement, setup, and programming
* Transfer Case High/Low Clutch Reset (See: Transmission and Drivetrain/Transfer Case/Testing and Inspection/Symptom Related
Diagnostic Procedures/MP 3023/3024-NQH - Transfer Case/Transfer Case High/Low Clutch Reset)
MP 3010-NP0 - Transfer Case
DTC B0785
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 B0785 01
- 2 High Indicator Circuit Short to Battery
DTC B0785 06
- 2 High Indicator Circuit Short to Ground or Open
Diagnostic Fault Information
Circuit/System Description
The 2 High indicator circuit consists of a light emitting diode (LED), a LED feed circuit and a LED control circuit. The indicator dimming control
circuit is the LED feed circuit and continuously supplies voltage to the 2 High, Auto 4WD, and 4 High LEDs. When the 2 High mode has been
selected by the driver, the transfer case shift control module (TCCM) provides a ground through the 2 High indicator control circuit illuminating the
LED. The TCCM tests the 2 High indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the indicator dimming
control circuit by grounding the 2 High indicator control circuit for 2 seconds during the bulb test at key ON.
Conditions for Running the DTC
B0785 01
* Ignition ON
* System voltage 10-18 V
* Instrument panel lights not dimmed.
* Daylight running lights MUST be commanded ON.
* Circuit tested when the 2 High indicator is commanded ON.
B0785 06
* Ignition ON
* System voltage 10-18 V
* Instrument panel lights not dimmed.
* Daylight running lights MUST be commanded ON.
* Circuit tested when the 2 High indicator is commanded OFF.
Conditions for Setting the DTC
Diagnostic Repair parts ,Wiring Diagrams. DTC. TSB,Car, Truck, SUV & Van Acura Chrysler Infiniti Maserati Rolls-Royce Alfa Romeo Dodge Jaguar Mazda Scion Aston Martin Ferrari Jeep McLaren Smart Audi Fiat Karma Mercedes-Benz Spyker BMW Ford Kia Mini Subaru Bentley Freightliner Lamborghini Mitsubishi Tesla Bugatti GMC Land Rover Mobility Ventures Toyota Buick Genesis Lexus Nissan Volkswagen Cadillac Honda Lincoln Porsche Volvo Chevrolet Hyundai Lotus Ram