Pinpoint Test H : P0A0A:01: Notes

WARNING: This page is about a different variant/trim than selected.

Refer to Electronic Engine Controls for schematic and connector information.

WARNING: WARNING: To prevent the risk of high-voltage shock, always follow precisely all warnings and service instructions, including instructions to depower the system. The high-voltage hybrid system utilizes approximately 300 volts DC, provided through high-voltage cables to its components and modules. The high-voltage cables and wiring are identified by orange harness tape or orange wire covering. All high-voltage components are marked with high-voltage warning labels with a high-voltage symbol. Failure to follow these instructions may result in serious personal injury or death.

Normal Operation and Fault Conditions

The PCM monitors the DC to DC Converter Control Module (DC/DC), PTC heater, the A/C compressor module, GFM2, and the TCM high voltage circuits. The high voltage interlock system verifies these connectors are properly connected. The PCM sends a 5-volt reference signal to each connector, in series and monitors the voltage return. The PCM high voltage interlock sense input checks for continuity of the high-voltage system interlock circuit. The interlock circuit must have continuity before high-voltage is supplied to the vehicle. The interlock circuit voltage travels through each of the high-voltage components and high-voltage cables and back to the PCM. The PCM sets a DTC if voltage on these inputs are above or below a calibrated threshold.

Possible Sources

Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
High voltage components
High voltage connector C1822B shorting bars not installed properly
PCM

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Conditions
P0A0A:01	High Voltage System Interlock Circuit General Electrical Failure	The PCM detects greater than 4.9 volts or less than 0.1 volt at the high voltage interlock sense input.