CAN communication Circuit Inspection

Connect all unit/module's connector.
IG key "ON", Engine "OFF".

Measure the voltage between the terminal of SLM* harness connector and Chassis Ground as below.

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

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

NOTE: SLM* : "SLM"