CAN Communication Circuit Inspection

Item	Prerequisite condition	Normal Value	(-) Probe	↔	(-) Probe
C-CAN High Open/Short: Voltage	Ignition switch: ON All unit/module's connector: Connect	Below 5V (1.5V~3.5V)	HUD*_"C-CAN High"	↔	Chassis Ground
C-CAN Low Open/Short: Voltage	Ignition switch: ON All unit/module's connector: Connect	Below 5V (1.5V~3.5V)	HUD*_"C-CAN Low"	↔	Chassis Ground

Is the voltage within specification?
YES
1. Disconnect B-CAN communication unit/module one by one and monitor DTC to find the cause.
  → If the DTC erase, substitute the unit/module with an usable one, and check for proper operation.
  
  → Repair or replace the harness/connector as necessary, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
1. If the measured value is Battery Voltage Level (12V),
  → Repair Short between the harness/connector and Battery Power.
2. If the measured value is Ground Level (0V),
3. Repair Short between "C-CAN High" line and "C-CAN Low" line.
  → Repair Open/Poor Connection in the harness/connector.
  
  → Repair Short between the harness/connector and Chassis Ground.

NOTE: HUD*: "HEAD UP DISPLAY"