MG 4 Gear Selector: Difference between revisions
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===CAN Bus=== | ===CAN Bus=== | ||
The Powertrain CAN Bus has a baud rate of 500kBaud. | The Powertrain CAN Bus has a baud rate of 500kBaud. | ||
{| class="wikitable" | |||
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!CanId | |||
!Message | |||
!0 | |||
!1 | |||
!2 | |||
!3 | |||
!4 | |||
!5 | |||
!6 | |||
!7 | |||
|- | |||
|0x09D | |||
|Heartbeat from Shifter | |||
|CRC8 | |||
|Counter 8-bit | |||
|? | |||
|? | |||
|? | |||
|? | |||
|? | |||
|? | |||
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Revision as of 17:48, 15 August 2025
General Information
MG 4 uses a rotary gear selector. Neutral corresponds to the central rest postion, Reverse is selected by an anticlockwise twist, Drive by clockwise rotation of the gear knob. Park is selected by pressing the gear knob. Gear selection is communicated by CAN.
The unit incorporates three LEDs across the top of the unit which correspond to Reverse, Neutral and Drive.
The knob itself lights up in Yellow when Park is selected.
Part Numbers
SAIC Motor Shift-by-wire : 11357121
Pinout and Connector
The shifter uses a 12 way connector, of which only 5 pins are connected. Required plug is:
Molex 347290122 : https://www.molex.com/en-us/products/part-detail/0347290122
When viewed from the rear of the unit, Pin1 is top-left, Pin12 is bottom right.
| Pin | OEM Wire Colour | Function |
|---|---|---|
| 1 | Black/Yellow | 12V |
| 5 | Pink/White | 12V WakeupEnable |
| 7 | Yellow/Blue | PT-CAN Ext High |
| 8 | Green/Yellow | PT-CAN Ext Low |
| 12 | Black | GND |
CAN Bus
The Powertrain CAN Bus has a baud rate of 500kBaud.
| CanId | Message | 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 |
|---|---|---|---|---|---|---|---|---|---|
| 0x09D | Heartbeat from Shifter | CRC8 | Counter 8-bit | ? | ? | ? | ? | ? | ? |