Circuit/System Testing
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Inspect for proper coolant level in the hybrid cooling system reservoir.
- If coolant level is low refer to Generator Control Module Cooling System Draining and Filling .
- Inspect the hybrid cooling system radiator for debris or obstruction.
- If a concern is found, repair or replace the restricted or damaged components as necessary.
- Inspect for proper operation of all hybrid system coolant pumps.
- If a concern is found, repair or replace the coolant pumps as necessary.
- Command the cooling fans through all operating speeds.
- If the cooling fans do not operate in all speeds, refer to Cooling Fan Inoperative (w/ LFA) .
- If the above inspections do not identify a concern, disassemble the drive motor generator control module assembly and inspect the APM and PIM cooling surfaces for excessive corrosion or contamination restriction. Refer to Drive Motor Generator Power Inverter Module Removal and Installation .
- If a concern is found, clean the APM and/or PIM cooling surfaces or replace the APM as necessary.