2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 350

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 350

* 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)

B0790

DTC B0790

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 B0790 01

- Neutral Indicator Circuit Short to Battery

DTC B0790 06

- Neutral Indicator Circuit Short to Ground or Open

Diagnostic Fault Information

Circuit/System Description

The Neutral indicator circuit consists of a light emitting diode (LED) feed circuit, a LED and a LED control circuit. The Ignition 1 voltage circuit is

the LED feed circuit and continuously supplies B+ to the Neutral LED. When the Neutral mode has been selected by the driver, the transfer case

shift control module (TCCM) provides a ground through the Neutral indicator control circuit illuminating the LED.

The TCCM tests the Neutral indicator circuit for unexpected voltage by monitoring the B+ supplied by the BCM on the Ignition 1 voltage circuit by

grounding the Neutral indicator control circuit for 2 seconds during the Bulb Test at key ON.

Conditions for Running the DTC

B0790 01

* Ignition ON

* System voltage 10-18 V

* Instrument panel lights not dimmed.

* Daylight running lights MUST be commanded ON.

* Circuit tested when the Neutral indicator is commanded ON.

B0790 06

* Ignition ON

* System voltage 10-18 V

* Instrument panel lights not dimmed.

* Daylight running lights MUST be commanded ON.

* Circuit tested when the Neutral indicator is commanded OFF.

Conditions for Setting the DTC

B0790 01

The TCCM detects 3.4 V or greater on the AWD/4WD Auto indicator control circuit when the Neutral indicator is commanded ON.

B0790 06

The TCCM detects 1.6 V or less for 1.5 seconds on the AWD/4WD Auto indicator control circuit when the Neutral indicator is commanded OFF.