2010 Cadillac Truck Escalade RWD V8-6.2L Page 2884
Scan Tool Reference
Control Module References (See: Testing and Inspection/Programming and Relearning) for scan tool information.
Circuit/System Testing
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.
Failure to follow the procedures exactly as written may result in serious injury or death.
1. With the ignition OFF, disconnect the module harness connectors listed below, if equipped, one at a time. After each disconnect, retest the
BCM for current DTCs. DTC U2099 should remain current.
* Drive motor generator battery control module (BECM) (RPO HP2) - X 1
* Electronic brake control module (EBCM) - X 1
* Electronic suspension control (ESC) module - X 1
* Fuel pump flow control module (FPCM) - X 1
* Power steering control module (PSCM) (RPO HP2) - X 1
瀚慖f the DTC becomes history, replace the module disconnected before the DTC became history.
Important: If the vehicle is not equipped with RPO HP2 proceed to step 6.
2. Perform the High Voltage Disabling () procedure.
3. Ignition OFF, disconnect harness connector X1 of the BECM.
4. Reconnect the 12-volt battery.
5. Test the BCM for current DTCs. DTC U2099 should remain current.
瀚慖f the DTC becomes history, replace the BECM.
6. Ignition OFF, disconnect the harness connector X 3 at the BCM.
7. With the above harness connectors still disconnected, test for infinite resistance between the high speed GMLAN serial data wake up circuit
terminal 19 and ground.
瀚慖f less than the specified value, test the wake up circuit for a short to ground.
8. If all circuits test normal and DTC is current, 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 module replacement, setup, and programming
U0073 or U2100
DTC U0073 or U2100
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.
