Diagnostic Aids
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.
- Test for a fully engaged high voltage manual disconnect lever whenever an open high voltage interlock circuit condition is observed. The manual disconnect lever must be pressed down fully in order to engage the high voltage interlock circuit terminals.
- The battery energy control module high voltage interlock source circuit and high voltage interlock return circuit current sensors may not measure actual circuit current with the same accuracy. The battery energy control module high voltage interlock source circuit parameter may indicate less current than the battery energy control module high voltage interlock return circuit parameter for this reason. Measuring actual HVIC current with a DMM may also not compare directly to the parameter display.
- The high voltage interlock circuit detects removal of the following components:
- The drive motor generator control module sight shield
- The transmission 3 phase cable cover
- The high voltage manual disconnect lever
- The hybrid battery terminal extension cover assembly
- The high voltage interlock circuit is also routed through several inline connectors.
- With the ignition in the OFF position, the battery energy control module will source the high voltage interlock circuit current for 5 minutes every time a vehicle door is opened.