Circuit/System Testing
WARNING: This page is about a different car, the 2011 GMC Yukon, 2011 Chevrolet Tahoe, and 2011 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
- Perform the High Voltage Disabling .
- Ignition OFF, disconnect the appropriate 3-phase cable assembly from the T6 drive motor generator power inverter module listed below. Refer to Generator Control Module 3-Phase Cable Assembly Replacement .
Drive Motor 1
- X7 phase U
- X8 phase V
- X9 phase W
Drive Motor 2
- X10 phase U
- X11 phase V
- X12 phase W
- Test for infinite resistance to circuit terminals listed below and ground:
Drive Motor 1
- X7 terminal phase U
- X8 terminal phase V
- X9 terminal phase W
Drive Motor 2
- X10 terminal phase U
- X11 terminal phase V
- X12 terminal phase W
- If disconnect the 3-phase cable assembly from the T12 automatic transmission assembly. Refer to Generator Control Module 3-Phase Cable Assembly Replacement . Ensure the terminals are not contacting chassis ground. Test the circuits for short to ground. If the circuits test normal, replace the M15 drive motor.
- Replace the T6 drive motor generator power inverter module.
WARNING:
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:
Failure to follow the procedures exactly as written may result in serious injury or death.