Installation Guide
CONFIDENTIAL
TG-0057_19 TM4 SUMO HD CO300-A1_A2_A2.5 Installation Guide
© Dana TM4 inc., 2013-2020
Page 29 of 42
2020-11-20
4.5.7 Connecting the VMU interface harness
Carefully read all safety instructions related to electrical installation (Section 4.5.1) and general information
for installing cables and harnesses in Section 4.5.2 before continuing with your integration.
IMPORTANT NOTE
: Disable the high-voltage and auxiliary batteries before connecting or disconnecting
the VMU interface harness.
4.5.7.1 Preparing the VMU/ECU interface harness
A VMU or client ECU interface harness (not supplied by TM4) is required between the Motor Control Unit
(MCU) and the Vehicle Management Unit (VMU). The VMU interface harness contains all required signals
to interface the MCU with the VMU including the enable signal and the CAN ports.
The VMU interface is located on the left side of the MCU next to the motor sensor interface (Figure 11) and
has 14 pins.
Figure 11
VMU/ECU interface location – Underside of the MCU
As vehicle integrators are able to connect the TM4 SUMO™ system to the VMU or ECU of their choice, the
integrator will have the responsibility of fabricating the VMU interface harness using wiring appropriate to
the specific installation environment. TM4, therefore, does not deliver a VMU harness with the system; only
the plug and contacts described in the Kit documentation [7] are included.
Note
: Although the signal connectors are fully watertight when correctly installed, we strongly recommend
that you help direct water away from the connector heads by creating a drip loop with the cable in your
installation. Also, before connecting or reconnecting VCU harness connector, carry out a visual inspection
to ensure that the pins on both connectors of the harness are undamaged and that there is no dirt or debris
that might interfere with the contacts.
