P0A8D

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PINPOINT TEST 1: DTCs P0A8D AND P0A8E - 14-VOLT POWER MODULE SYSTEM VOLTAGE - HYBRID

Normal Operation

With the ignition switch in the ON position and the engine on or off (the engine must have started at least once after the key was cycled to ON), the planetary gear set in the electronically-controlled continuously variable transmission (eCVT) engages the generator (also in the eCVT), which charges the high-voltage traction battery (HVTB) and supplies high-voltage to the DC/DC converter. The DC/DC converter steps the high-voltage down to 12 volts (operating range of 13.35-16 volts). The DC/DC converter charges the low-voltage battery which is used to power the PCM and low-voltage components.

- DTC P0A8B (14-Volt Power Module System Voltage) - Voltage less than 2.5 volts or greater than 25 volts on input circuit (GY/R) indicates an internal traction battery control module (TBCM) fault, or if the 12-volt battery has recently had the terminals disconnected/cleaned or, if a new 12-volt battery has been recently installed may, cause the TBCM to set this DTC.
- DTC P0A8D (14-Volt Power Module System Voltage Low) - Voltage less than 10 volts on input circuit (GY/R) for 5 seconds continuously, or if the 12-volt battery has recently had the terminals disconnected/cleaned or, if a new 12-volt battery has been recently installed may, cause the TBCM to set this DTC.
- DTC P0A8E (14-Volt Power Module System Voltage High) - Voltage greater than 16 volts on input circuit (GY/R) for 5 seconds continuously, or if the 12-volt battery has recently, had the terminals disconnected/cleaned or, if any external jump start procedure has been carried out recently may, cause the TBCM to set this DTC.

Possible Causes
- 12-volt battery
- HVTB

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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