Mitsubishi Outlander Water Heater

The Outlander PHEV has an optional electric water heater. This unit appears to be a 3rd generation (2011-2019 ish) http://www.mhi.co.jp/technology/review/pdf/e542/e542057.pdf. Specified as a 4kw unit.

The photo below is a Gen 3 heater and is CAN controlled.

Gen 3 (2016-2019)

Low Voltage Pinout (Gen 3)

Top row, yellow is 12+, black is GND.

Bottom row, under the yellow is Can H and under GND is Can L

The mating connector looks to be Sumitomo 6189-0126 https://www.auto-click.co.uk/6189-0126?search=90980-10942

1 - 12v, 2 - GND, 3 - CAN H, 4 - CAN L

High Voltage Pinout

Can Messages from Heater (Gen 3)

When 12v is connected, without HV, the following messages are broadcast:

0x398 ID 00 09 00 3B 3B 00 00 00 at 100ms byte 3 seems to be water temperature, byte 4 device temperature

0x630 ID 00 00 00 00 00 00 00 00 at 500ms

0x062D ID 00 00 00 00 00 00 00 00 at 500ms

0x06BD ID 00 00 00 00 00 00 00 00 at 500ms

When HV is connected 0x398 changes to the message below.

0x398 ID 00 00 00 3B 3B 00 00 00 at 100ms

Control Can Messages

Not yet discovered.

Gen 2 (2011 - 2016)

The Previous generation of water heater is larger and heavier than the Gen 3, part number 7807A007. Controlled via external ECU rather than CAN.

Low Voltage pinout and control

1. +12v (Red)
2. None
3. HTR1 (green)
4. HTR2 (yellow)
5. HTR3 (Orange)
6. Ground (Black)
7. Outlet temp (White)
8. Inlet Temp (Grey)

Temperatures are sensed by the resistance from the temperature pins to ground. Some exact resistance to temperature data will be posted soon.

Inputs required on HTR1-3 are currently unknown.

High Voltage connector

Same as Gen 3 in appearance and polarity.