2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 461

2010 Cadillac Truck Escalade RWD V8-6.0L Hybrid Page 461

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.

Repair Instructions

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

* Battery Current Sensor Replacement (See: Powertrain Management/Computers and Control Systems/Battery Current Sensor/Service and

Repair)

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

Engine Electrical - Hybrid (HP2)

DTC B1516

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 B1516 08

- Battery Current Sensor Performance Signal Invalid - 12V