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Troubleshooting and Testing
4.9
ESC Testing
4.9.1
ESC CAN Network Testing
The ECU, SAS and ESC module are all connected on propriety CAN network with internal terminating
resistors on each one of these components. A failure to one of the components will cause others to fault out.
4010628a
SAS
ESC
MODULE
HECU
CAN
L
H
GND
U
B
4.9.1.1
ESC Module Testing
Electrical Checks
For the following checks, all of the ECU connectors must be plugged in as well as the SAS. The ECU
provides voltage, ground and CAN communication to ESC module.
Take measurements at the ESC module harness connector.
Measure voltage supply Key ON.
Measure CAN High voltage Key ON.
Measure CAN Low voltage Key ON.
Measure terminating resistance across CAN High and Low with Key OFF.
Frame-mounted ECU only: Measure ground resistance Key OFF to chassis ground.
With ECU and ESC Module disconnected: Verify continuity end to end on each line.
Verify no shorts to ground or battery on all lines.
Verify no continuity between pins.
