1.
CAN communication waveform inspection
(1)
IG KEY "OFF", ENGINE "OFF".
(2)
Connect 2 channel scope to DLC terminal 3(CAN HIGH) and 11(CAN LOW),
(3)
Connect only ECM connector to CAN BUS and turn IG KEY "ON".
(4)
Connect only TCM connector to CAN BUS and turn IG KEY "ON".
a.
Specification : The waveform similar to the waveform above is displayed at "IG KEY "ON".
※ If both CAN High and Low signals are fixed at 2.5V or High signal is 3.5V and Low signal, this means communicaiton error of each module.
(5)
Is waveform similar to above waveform displayed?
YES
a.
Go to "Verification of vehicle Repair.
NO
a.
Replace the module from which abnormal waveform is outputted, and go to "Verification of Vehicle Repair".
