2010 Cadillac Truck Escalade ESV AWD V8-6.2L Page 1604
Danger: Always perform the High Voltage Disabling procedure prior to servicing any High Voltage component or connection.
Personal Protection Equipment (PPE) and proper procedures must be followed.
The High Voltage Disabling procedure will perform the following tasks:
* Identify how to disable high voltage.
* Identify how to test for the presence of high voltage.
* Identify condition under which high voltage is always present and personal protection equipment (PPE) and proper procedures
must be followed.
Before working on any high voltage system, be sure to wear the following Personal Protection Equipment:
* Safety glasses with appropriate side shields when within 50 feet of the vehicle, either indoors or outdoors.
* Certified and up-to-date Class "0" Insulation gloves rated at 1000V with leather protectors.
- Visually and functionally inspect the gloves before use.
- Wear the Insulation gloves at all times when working with the high voltage battery assembly, whether the system is energized or
not.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. Ignition OFF, disable the high voltage at the drive motor generator battery. Refer to High Voltage Disabling ().
2. Test for infinite resistance between the terminals listed below and ground;
* positive contactor terminal X2
* positive contactor terminal X3
* negative contactor terminal X2
* negative contactor terminal X3
锟斤拷If less than the specified value, replace the high voltage cable.
3. Test for less than 1 ohm between the terminals listed below;
* B+ (300 V) and positive contactor terminal X2
* Ground (300 V) and negative contactor terminal X2
* positive contactor terminal X3 and positive cable terminal X1
* negative contactor terminal X3 and negative cable terminal X2
锟斤拷If greater than the specified range, replace the high voltage cable.
4. Connect the 12 V battery.
5. Ignition ON, command the negative and positive contactors and the current limit relay ON and OFF with a scan tool. Listen for the contactors
and relay to turn ON and OFF.
锟斤拷If the negative contactor, positive contactor or the current limit relay does not turn ON and OFF, refer to High Voltage Contactor/Relay
Malfunction ().
6. If all the circuit tests normal, replace the drive motor generator battery.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Drive Motor Battery Negative Relay Cable Replacement ()
* Drive Motor Battery Positive Relay Cable Replacement ()
* Drive Motor Battery Positive and Negative Cable Replacement ()
* Drive Motor Generator Battery Replacement and Shipping Preparation ()
* Control Module References (See: Testing and Inspection/Programming and Relearning) for drive motor generator battery control module
replacement, setup and programming
