Terminating Resistor

To prevent electrical reflections and interference in the Controller area network (CAN) there are terminating resistors which bridge CAN H and CAN L. One in each end point on both the high and low speed side of the network. Each terminating resistor has a resistance of 120 ohm.

• The terminating resistor for the high speed Controller area network (CAN) is positioned in the brake control module/ABS control module and in the engine control module (ECM) or electronic throttle module. The terminating resistor is in the engine control module, on models without an electronic throttle module
• There are terminating resistors for the low speed Controller area network (CAN) in the upper electronic module and the rear electronic module.

Both the terminating resistors create a parallel circuit The following resistors can be measured under specified conditions:

• When the Controller area network (CAN) is intact the resistance in the network is approximately 60 ohm
• In the event of an open-circuit in the wiring, the resistance in the network is approximately 120 ohm
• In the event of a short-circuit between the communication cables the resistance is approximately 0 ohm.