P0AA6

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PINPOINT TEST 7: DTC P0AA6 - HYBRID BATTERY VOLTAGE SYSTEM ISOLATION FAULT

Normal Operation

With the ignition switch in the ON position and the engine on or off (the engine must have run at least once after the key was cycled to ON), the battery control module (BCM) monitors the electrical isolation (leakage resistance) between the high-voltage system and the vehicle chassis. A resistance value of less than 190,000 ohms (for 10 seconds or greater) is a failure. The normal resistance value is between 950,000-1,330,000 ohms.

- DTC P0AA6 (Hybrid Battery Voltage System Isolation Fault) - If the BCM detects a high-voltage system leakage of less than 190,000 ohms for 10 seconds or greater, or if the BCM detects a high-voltage system leakage of less than 66,000 ohms (with no time frame), the vehicle does not restart and the BCM sets this DTC.

Possible Causes
- DC/DC converter wiring harness (high voltage)
- DC/DC converter
- High-voltage cables
- High-voltage traction battery (HVTB)
- Electronically-controlled continuously variable transmission (eCVT)
- Moisture/water penetration of high-voltage connectors

Diagnostic Procedure

WARNING:Wear high-voltage insulated safety gloves and a face shield when working with high-voltage batteries or cables. The high-voltage insulated safety gloves should be of the appropriate safety and protection rating. Inspect the gloves before use and always wear them with the leather outer glove. Any hole in the rubber insulating glove is a potential entry point for high-voltage. Failure to follow these instructions may result in serious personal injury or death.

WARNING:Turn OFF the ignition switch for a minimum of 5 minutes before removing high-voltage cables. High-voltage cables and wiring are orange in color. The nominal high-voltage traction battery voltage (HVTB) is 330 V DC. Failure to follow these instructions may result in serious personal injury or death.

WARNING:Depower the high-voltage traction battery (HVTB) before carrying out any removal or installation procedures affecting the high-voltage battery system. Failure to follow this instruction may result in serious personal injury or death.

WARNING:When servicing the high-voltage system, establish a buffer zone per the specified procedure. Failure to follow this instruction may result in serious personal injury or death.

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