Direct Current To Direct Current Converter
| ITEM | DESCRIPTION |
|---|---|
| 1 | Direct Current to Direct Current (DC/DC) converter |
| 2 | DC/DC converter housing wiring harness connector |
| 3 | DC/DC converter terminal - MHEV battery (positive) |
| 4 | DC/DC converter terminal - Ground and MHEV battery (ground) |
| 5 | DC/DC converter terminal - Startup battery (12V positive) |
The Direct Current to Direct Current (DC/DC) converter is located in the DC/DC converter housing. The DC/DC converter is secured on 3 studs to the upper DC/DC converter housing with 3 nuts.
The DC/DC converter is supplied with power from the MHEV battery. The DC/DC converter converts the MHEV battery voltage from approximately 48V Direct Current (DC) to 12V DC. The 12V DC is for all the vehicles 12V systems and startup battery. This charges the startup battery and provides all the electrical power for all the 12V components. The output from the DC/DC converter is approximately 14V.
The DC/DC converter supplies all the power for the startup battery and for all the vehicle 12V systems only in Power Mode 7.
For additional information, Refer to: STARTUP BATTERY AND CABLES
The DC/DC converter has 4 electrical connections for the following:
- MHEV battery cable terminal (positive) through the DC/DC converter busbar to the MHEV battery junction box.
- For additional information, Refer to: MHEV BATTERY AND CABLES
- Ground cable terminal (ground) through the DC/DC converter busbar to the MHEV battery junction box. The DC/DC converter busbar also connects to the vehicle body ground connection.
- For additional information, Refer to: MHEV BATTERY AND CABLES
- For additional information, Refer to: STARTUP BATTERY AND CABLES
- 12V DC output to the Battery Junction Box (BJB) through the DC/DC converter busbar to the startup battery and the vehicle 12V systems.
- For additional information, Refer to: STARTUP BATTERY AND CABLES
- Wiring harness connector with 10-pin connections for the following:
- Power supply from the Body Control Module/Gateway Module (BCM/GWM).
- Power supply to the DC/DC converter electric cooling fan.
- Ground for the DC/DC converter electric cooling fan.
- Pulse Width Modulation (PWM) signal to the DC/DC converter electric cooling fan.
- High Speed (HS) Controller Area Network (CAN) power mode zero systems bus (quantity 2).
- A ground connection.
The DC/DC converter controls the DC/DC converter electric cooling fan depending on cooling requirements with a PWM signal.