2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 268

* 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.

Genuine M-Brakes Rear Brake Pad Set BMW F22 F30 F31 F33 F34 F36 228 328 335 435

C $197.67 End Date: Thursday Nov-21-2019 8:00:53 PST Buy It Now for only: C $197.67 Buy It Now | Add to watch list

OEM M-Brakes Rear Brake Pad Set BMW F22 F23 F30 F31 F33 F34 F36 228 328 335 435

C $158.13 End Date: Thursday Nov-21-2019 7:57:57 PST Buy It Now for only: C $158.13 Buy It Now | Add to watch list

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 34

3. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground on the SDM side of the connector:

* Control circuit terminal 5 X1

* Control circuit terminal 6 X1

* Control circuit terminal 8 X1

* Control circuit terminal 7 X1

锟斤拷 If greater than the specified range, test the control circuit for a short to voltage. If the circuit tests normal, replace the SDM.

4. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground on the SDM side of the connector:

* Control circuit terminal 5 X1

* Control circuit terminal 6 X1

* Control circuit terminal 7 X1

* Control circuit terminal 8 X1

锟斤拷 If less than the specified range, test the control circuit for a short to ground. If the circuit tests normal, replace the SDM.

5. Install a 3 A fused jumper wire between the control circuit terminals listed below.

* Passenger instrument panel airbag stage 1 terminal 5 and 6 X1

* Passenger instrument panel airbag stage 2 terminal 8 and 7 X1

6. Verify the scan tool Deployment Loop Resistance parameter is less than 2 ohm.

锟斤拷 If greater than the specified range, test both control circuits terminals for an open/high resistance. If the circuits test normal, replace the

SDM.

7. Disconnect the passenger instrument panel air bag harness connector.

8. With the appropriate load tool adaptor, connect special tool J 38715-A in place of the air bag.

9. Ignition ON, test for less than 11 V between the control circuit terminals listed below and ground:

* Control circuit terminal A1

* Control circuit terminal A2

* Control circuit terminal B1

* Control circuit terminal B2

锟斤拷 If greater than the specified range, test the control circuit for a short to voltage.

10. Ignition OFF, test for greater than 25 ohm between the control circuit terminals listed below and ground:

* Control circuit terminal A1

* Control circuit terminal A2

* Control circuit terminal B1

* Control circuit terminal B2

锟斤拷 If less than the specified range, test the control circuit for a short to ground.

11. Ignition OFF, test for less than 5 ohm between the control circuit terminals listed below:

* X200 control circuit terminal A1 and passenger instrument panel air bag harness connector control circuit terminal A1

* X200 control circuit terminal A2 and passenger instrument panel air bag harness connector control circuit terminal A2

* X200 control circuit terminal B1 and passenger instrument panel air bag harness connector control circuit terminal B1

* X200 control circuit terminal B2 andpassenger instrument panel air bag harness connector control circuit terminal B2

锟斤拷 If greater than the specified range, test the control circuit for an open/high resistance.

12. If all circuits test normal, replace the passenger instrument panel air bag.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

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

Procedures/Wiring Repairs/SIR/SRS Wiring Repairs)

* Instrument Panel Inflatable Restraint Module Replacement (See: Restraints and Safety Systems/Air Bag Systems/Air Bag/Service and

Repair/Removal and Replacement/Instrument Panel Inflatable Restraint Module Replacement)

* Steering Wheel Inflatable Restraint Module Replacement (See: Restraints and Safety Systems/Air Bag Systems/Air Bag/Service and

Repair/Removal and Replacement/Steering Wheel Inflatable Restraint Module Replacement)

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 589

* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure

Instructions) provides an overview of each diagnostic category.

DTC Descriptor

DTC B2600 00

- Daytime Running Lamp Control Circuit

Diagnostic Fault Information

Circuit/System Description

The ambient light sensor is used to monitor outside lighting conditions. The ambient light sensor provides a voltage signal that will vary between 0.2

and 4.9 V depending on outside lighting conditions. The body control module (BCM) provides a 5 V reference signal to the ambient light sensor.

The body control module (BCM) monitors the ambient light sensor signal circuit to determine if outside lighting conditions are correct for either

daytime running lights (DRL) or automatic lamp control (ALC) when the headlamp switch is in the AUTO position. In daylight conditions, the BCM

will command the DRLs ON by applying ground to the DRL relay via the DRL relay control circuit. When the BCM applies ground to the DRL

relay control circuit, the DRL relay coil energizes causing the relay switch contacts to close. With the DRL relay energized, voltage is applied

through the relay switch contacts, the DRL Resistor, and the DRL fuse to the left and right low beam headlamp fuses illuminating the low beam

headlamps. Any function or condition that turns the headlamps ON will cancel DRL operation. Any function or condition that turns on the

headlamps will cancel DRL operation.

Conditions for Running the DTC

* Battery voltage must be between 9-16 V.

* Headlamp switch in AUTO position.

Conditions for Setting the DTC

The BCM detects a short to voltage in the DRL relay control circuit.

Action Taken When the DTC Sets

The BCM will disable the DRL relay control circuit.

Conditions for Clearing the DTC

* The condition responsible for setting the DTC no longer exists.

* A history DTC will clear once 100 consecutive malfunction-free ignition cycles have occurred.

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 9

Conditions for Clearing

* The DTC will transition to history when the fault is no longer present.

* A history DTC will clear after 100 malfunction-free ignition cycles.

Reference Information

Schematic Reference

Object Detection Schematics (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Diagrams/Electrical

Diagrams)

Connector End View Reference

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

Description and Operation

Object Detection Description and Operation (UFT) (See: Accessories and Optional Equipment/Collision Avoidance and Parking Assist

Systems/Description and Operation/Object Detection Description and Operation (UFT))Object Detection Description and Operation (UVC) (See:

Accessories and Optional Equipment/Collision Avoidance and Parking Assist Systems/Description and Operation/Object Detection Description and

Operation (UVC))Object Detection Description and Operation (UD7) (See: Accessories and Optional Equipment/Collision Avoidance and Parking

Assist Systems/Description and Operation/Object Detection Description and Operation (UD7))

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)

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the rearview camera.

2. Ignition ON, park brake applied, transmission in REVERSE, test for B+ between the B+ circuit terminal 3 and ground.

锟斤拷 If less than the specified value, test the B+ circuit for a short to ground or an open/high resistance.

3. If all circuits test normal, replace the BCM.

Repair Instructions

Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.

Control Module References (See: Testing and Inspection/Programming and Relearning)for BCM replacement, setup, and programming

B0012

DTC B0012 or B0013

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 B0012 01

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Battery

DTC B0012 02

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Short to Ground

DTC B0012 04

- Driver Steering Wheel Air Bag Deployment Loop Stage 1 Open Circuit

2019 Cadillac Truck Escalade AWD V8-6.2L Diagnostic Instructions Page 237

Scan Tool Reference

Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information

Circuit/System Verification

1. Measure actual outside air temperature using a thermometer. Compare this value to the scan tool Outside Air Temp. Raw parameter. The

measured temperature should be within 5 degrees of parameter.

锟斤拷 If not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

2. Measure actual inside air temperature using a thermometer. Compare this value to the scan tool Inside Air Temp. Sensor parameter and Aux.

Inside Air Temp. parameter. The measured temperature should be within 5 degrees of parameter.

锟斤拷 If not within the specified range, refer to Ambient / Inside Air Temperature Sensor Circuit Malfunction.

3. Measure actual temperature using a thermometer at each of the duct temperature sensors. Compare this value to the appropriate scan tool Duct

Actual parameter. The measured temperature should be within 5 degrees of appropriate Duct Actual parameter.

锟斤拷 If not within the specified range, refer to Duct Temperature Sensor Circuit Malfunction.

Circuit/System Testing

Ambient / Inside Air Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1 ohm between the low reference circuit terminal B and ground.

锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the HVAC

control module.

3. Ignition ON, verify the appropriate scan tool Temp Sensor parameter is greater than 85锟斤拷C (185锟斤拷F).

锟斤拷 If less than the specified range, test the signal circuit terminal A for a short to ground. If the circuit tests normal, replace the HVAC control

module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal A and the low reference circuit terminal B. Verify the scan tool Temp

Sensor parameter is less than -35锟斤拷C (-39锟斤拷F).

锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Duct Temperature Sensor Circuit Malfunction

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for less than 1.0 ohm between the low reference circuit terminal 2 and ground.

锟斤拷 If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the HVAC

control module.

3. Ignition ON, verify the appropriate Duct Temp Sensor Actual parameter is greater than 85锟斤拷C (185锟斤拷F).

锟斤拷 If less than the specified range, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the HVAC control

module.

4. Install a 3-amp fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool Duct

Temp Sensor Actual parameter is less than -35锟斤拷C (-39锟斤拷F).

锟斤拷 If greater than the specified range, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace

the HVAC control module.

5. If all circuits test normal, test or replace the appropriate temperature sensor.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate temperature sensor.

2. Test for the appropriate resistance between the signal terminal A or 1 and the low reference terminal B or 2. Refer to Sensor Resistance Table

for Sensor Resistance Table (See: Heating and Air Conditioning/Specifications/Electrical Specifications) resistance values.