MG 4 Gear Selector - Revision history

WillK: Added links to github and forum

2025-08-30T16:41:35Z

Added links to github and forum

← Older revision		Revision as of 16:41, 30 August 2025
Line 145:		Line 145:
	!POS1		!POS1
	!POS2		!POS2
	!
	\|-		\|-
	\|DRIVE		\|DRIVE
	\|05		\|05
	\|0A		\|0A
	\|
	\|-		\|-
	\|NEUTRAL		\|NEUTRAL
	\|06		\|06
	\|09		\|09
	\|
	\|-		\|-
	\|REVERSE		\|REVERSE
	\|07		\|07
	\|08		\|08
	\|
	\|-		\|-
	\|PARK		\|PARK
	\|08		\|08
	\|07		\|07
	\|
	\|}		\|}

			== Sample Code ==
			Arduino Due sketch to control shifter : https://github.com/will-camper/mg4-shifter

			== Forum Links ==
			https://openinverter.org/forum/viewtopic.php?t=6604

	==References==		==References==

WillK at 18:44, 15 August 2025

2025-08-15T18:44:28Z

← Older revision		Revision as of 18:44, 15 August 2025
Line 73:		Line 73:
	!CanId		!CanId
	!Message		!Message
			!Direction
	!0		!0
	!1		!1
Line 84:		Line 85:
	\|0x09D		\|0x09D
	\|Shifter Status (from Shifter)		\|Shifter Status (from Shifter)
			\|From Shifter
	\|CRC8 (bytes1-7)		\|CRC8 (bytes1-7)
	\|Counter 4-bit		\|Counter 4-bit
Line 95:		Line 97:
	\|-		\|-
	\|0x047		\|0x047
	\|Msg1 ~~from Controller~~		\|Control Msg1
	"Activate Shifter"?		"Activate Shifter"?
			\|To Shifter
	\|CRC8 (bytes1-7)		\|CRC8 (bytes1-7)
	\|Counter 4-bit		\|Counter 4-bit
Line 108:		Line 111:
	\|-		\|-
	\|0x12a		\|0x12a
	\|Msg2 ~~from Controller~~		\|Control Msg2
			\|To Shifter
	\|CRC8 (bytes1-7)		\|CRC8 (bytes1-7)
	\|Counter 4-bit		\|Counter 4-bit
Line 120:		Line 124:
	\|-		\|-
	\|0x2b6		\|0x2b6
	\|Msg3 ~~from Controller~~		\|Control Msg3
			\|To Shifter
	\|00		\|00
	\|00		\|00

WillK at 18:43, 15 August 2025

2025-08-15T18:43:02Z

@@ Line 52: / Line 52: @@
 |}
 ===CAN Bus===
@@ Line 57: / Line 65: @@
 Most messages have a standard CRC-8-SAE J1850. (polynomial 0x1D)
 {| class="wikitable"
 |+
@@ Line 84: / Line 96: @@
 |0x047
 |Msg1 from Controller
 |CRC8 (bytes1-7)
 |Counter 4-bit
@@ Line 116: / Line 129: @@
 |00
 |00
 |}

WillK at 18:30, 15 August 2025

2025-08-15T18:30:27Z

← Older revision		Revision as of 18:30, 15 August 2025
Line 1:		Line 1:

	==General Information==		==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.		MG 4 uses a rotary gear selector.
	~~Gear selection~~ is communicated by CAN.
			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.

			Selected gear is communicated by CAN.

	The unit incorporates three LEDs across the top of the unit which correspond to Reverse, Neutral and Drive.		The unit incorporates three LEDs across the top of the unit which correspond to Reverse, Neutral and Drive.
Line 14:		Line 19:

	The shifter uses a 12 way connector, of which only 5 pins are connected.		The shifter uses a 12 way connector, of which only 5 pins are connected.

	Required plug is:		Required plug is:
	Molex 347290122 : https://www.molex.com/en-us/products/part-detail/0347290122		Molex 347290122 : https://www.molex.com/en-us/products/part-detail/0347290122
Line 49:		Line 55:
	===CAN Bus===		===CAN Bus===
	The Powertrain CAN Bus has a baud rate of 500kBaud.		The Powertrain CAN Bus has a baud rate of 500kBaud.

			Most messages have a standard CRC-8-SAE J1850. (polynomial 0x1D)
	{\| class="wikitable"		{\| class="wikitable"
	\|+		\|+
Line 63:		Line 71:
	\|-		\|-
	\|0x09D		\|0x09D
	\|~~Heartbeat~~ from Shifter		\|Shifter Status (from Shifter)
	\|CRC8		\|CRC8 (bytes1-7)
	\|Counter 8-bit		\|Counter 4-bit
	\|?		F0-FF
	\|?		\|03
	\|?		\|POS1
	\|?		\|POS2
	\|?		\|<nowiki>F0\|F1</nowiki>
	\|?		\|<nowiki>38\|39</nowiki>
			\|FF
	\|-		\|-
	\|		\|0x047
	\|		\|Msg1 from Controller
	\|		\|CRC8 (bytes1-7)
	\|		\|Counter 4-bit
	\|		00-0F
	\|		\|45
	\|		\|9B
	\|		\|7F
	\|		\|FF
	\|		\|FF
			\|<nowiki>FE\|FF</nowiki>
	\|-		\|-
	\|		\|0x12a
	\|		\|Msg2 from Controller
	\|		\|CRC8 (bytes1-7)
	\|		\|Counter 4-bit
	\|		F0-FF
	\|		\|FF
	\|		\|FF
	\|		\|FF
	\|		\|FF
	\|		\|FF
			\|<nowiki>01\|11\|13\|14</nowiki>
			\|-
			\|0x2b6
			\|Msg3 from Controller
			\|00
			\|00
			\|02
			\|00
			\|00
			\|00
			\|00
			\|00
	\|}		\|}



	~~==Part Numbers==~~

	==References==		==References==

WillK at 17:48, 15 August 2025

2025-08-15T17:48:33Z

← Older revision		Revision as of 17:48, 15 August 2025
Line 49:		Line 49:
	===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"
			\|+
			!CanId
			!Message
			!0
			!1
			!2
			!3
			!4
			!5
			!6
			!7
			\|-
			\|0x09D
			\|Heartbeat from Shifter
			\|CRC8
			\|Counter 8-bit
			\|?
			\|?
			\|?
			\|?
			\|?
			\|?
			\|-
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|-
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|
			\|}

WillK at 14:46, 15 August 2025

2025-08-15T14:46:19Z

← Older revision		Revision as of 14:46, 15 August 2025
Line 1:		Line 1:

	==General Information==		==General Information==
	MG 4 uses a rotary gear selector. ~~Drive~~, Reverse ~~and Neutral are~~ selected by ~~rotating~~ the gear knob. Park is selected by pressing the gear knob.		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.		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 ===		=== Part Numbers ===

WillK: Created page with " ==General Information== MG 4 uses a rotary gear selector. Drive, Reverse and Neutral are selected by rotating the gear knob. Park is selected by pressing the gear knob. Gear selection is communicated by CAN. === 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 vie..."

2025-08-15T14:41:38Z

Created page with " ==General Information== MG 4 uses a rotary gear selector. Drive, Reverse and Neutral are selected by rotating the gear knob. Park is selected by pressing the gear knob. Gear selection is communicated by CAN. === 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 vie..."

New page

==General Information==
MG 4 uses a rotary gear selector. Drive, Reverse and Neutral are selected by rotating the gear knob. Park is selected by pressing the gear knob.
Gear selection is communicated by CAN.

=== 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.

{| class="wikitable"
|+12-Pin Pinout
!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.

==Part Numbers==

==References==
<references />
[[Category:MG]]
[[Category:Gear Selectors]]