Manually turning off rear motor

[akoni]

Hi, my front and rear motor in outlander is working.
i want to manually turn off the rear motor so that only front motor will run. I know this will throw DTC codes hut this car will only be used on slow speed thus turning off the rear motor will help save battery.

i want to add a toggle on/off switch to manually turn off or on the rear motor.

which pin should i cut to add physical toggle switch?
any help will be greatly appreciated

[midway]

The RSDN inverter wire is responsible for rear drive activity.

[arber333]

Hi, my front and rear motor in outlander is working.
i want to manually turn off the rear motor so that only front motor will run. I know this will throw DTC codes hut this car will only be used on slow speed thus turning off the rear motor will help save battery.

i want to add a toggle on/off switch to manually turn off or on the rear motor.

which pin should i cut to add physical toggle switch?
any help will be greatly appreciated

Hm... first tell me what do you use in way of VCU?
Philosophy here is NOT to turn OFF the motor/inverter but rather put the inverter into disable condition. This is done by changing Byte[6]=function in telegram 0x287. You could use a CAN repeater or "man in the middle" to filter certain messages and replace particular bytes with your appropriate values...or leave them unfiltered.

Code: Select all

0x287 Torque Command

Byte[6]=function
//0x00,0x02=no inverter response to torque
//0x03=rear motor responds to torque
//0x04=generator only responds to torque
//0x05=generator and front motor respond to torque.
Byte[7]=0x00;

I just received this CAN filter from aliexpress...
https://www.aliexpress.com/item/1005003 ... 1802Jg69el
It has dual CAN modules with several input pins that could be of your interest to change your mode of operations...

EDIT: I just remembered you may also get a report telegram about your motor function. If that is the case you would need to filter that out as well to avoid DTCs...

The other method would be with switching RSDN inverter input OFF so you would disable that motor. But that would cause a report in byte7 of 0x289 telegram to report DTC(probably).

Code: Select all

0x289 

B7 = RSDN pin status = 04 – not connected, 00 – connected

When this is turned back ON if car would be moving it would cause a good jolt when torque would return. I would rather use the first option....

With my VCU, which is a derivative of Aot93s Teensy VCU, i can put motor in neutral during driving and car is not the wiser.
When i return VCU to "drive" torque would return.
About the only important condition would be throttle pedal position. In my conversion I would set a conditional to ignore throttle command until it would cross 0Nm position to avoid any jolts....

[akoni]

The RSDN inverter wire is responsible for rear drive activity.

thank you for for this info

[akoni]

Hm... first tell me what do you use in way of VCU?
Philosophy here is NOT to turn OFF the motor/inverter but rather put the inverter into disable condition. This is done by changing Byte[6]=function in telegram 0x287. You could use a CAN repeater or "man in the middle" to filter certain messages and replace particular bytes with your appropriate values...or leave them unfiltered.

Code: Select all

0x287 Torque Command

Byte[6]=function
//0x00,0x02=no inverter response to torque
//0x03=rear motor responds to torque
//0x04=generator only responds to torque
//0x05=generator and front motor respond to torque.
Byte[7]=0x00;

I just received this CAN filter from aliexpress...
https://www.aliexpress.com/item/1005003 ... 1802Jg69el
It has dual CAN modules with several input pins that could be of your interest to change your mode of operations...

EDIT: I just remembered you may also get a report telegram about your motor function. If that is the case you would need to filter that out as well to avoid DTCs...

The other method would be with switching RSDN inverter input OFF so you would disable that motor. But that would cause a report in byte7 of 0x289 telegram to report DTC(probably).

Code: Select all

0x289 

B7 = RSDN pin status = 04 – not connected, 00 – connected

When this is turned back ON if car would be moving it would cause a good jolt when torque would return. I would rather use the first option....

With my VCU, which is a derivative of Aot93s Teensy VCU, i can put motor in neutral during driving and car is not the wiser.
When i return VCU to "drive" torque would return.
About the only important condition would be throttle pedal position. In my conversion I would set a conditional to ignore throttle command until it would cross 0Nm position to avoid any jolts....

thank you for this great information.
i have purchased the dual can filter you mentioned.
is there a youtube tutorial on this?

how do i start using the dual can filter for my project as you stated. Thank you