2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 485

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 485

* A history DTC will clear after 100 ignition cycles.

Reference Information

Schematic Reference

* Starting and Charging Schematics (See: Starting and Charging/Diagrams/Electrical Diagrams)

* Body Control System Schematics (See: Body and Frame/Body Control Systems/Diagrams/Electrical Diagrams)

Connector End View Reference

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

Description and Operation

Charging System Description and Operation (See: Starting and Charging/Charging System/Description and Operation)

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)

Scan Tool Reference

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

Circuit/System Verification

Ignition ON, headlamps and all accessories OFF, observe the scan tool BCM Battery Current parameter. The reading should be between -5 amps

and -25 amps, and change with the amount of current draw on the battery.

Circuit/System Testing

1. Ignition ON, observe the scan tool BCM Battery Voltage parameter. The reading should be equal to B+ voltage.

瀚慖f not the specified value, test the following BCM circuits for an open/high resistance. If the circuits test normal, replace the BCM.

* B+ circuit terminal 3 X3

* Ground circuit terminal 1 X3

* Ground circuit terminal 5 X3

* Ground circuit terminal 9 X4

2. Verify that the current sensor is mounted correctly on the negative battery cables. The sensor should be installed with the internal coil around

the negative battery cables, with the tape tab pointing away from the battery.

瀚慖f the sensor is not installed correctly, remove and reinstall the sensor.

3. Ignition OFF, disconnect the harness connector at the battery current sensor.

4. Ignition OFF and scan tool disconnected, open and close the driver door, and wait 1 minute. Test for less than 5 ohms between the low

reference circuit terminal B and ground.

瀚慖f greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the BCM.

5. Ignition ON, test for 4.5-5.5 volts between the 5-volt reference circuit terminal A and ground.

瀚慖f not within the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests

normal, replace the BCM.

6. Ignition ON, test for 4.5-5.5 volts between the signal circuit terminal C and ground.

瀚慖f not within the specified range, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace

the BCM.

7. If all circuits test normal, replace the battery current sensor.