CAN communication Circuit Inspection
| Item | Prerequisite condition | Normal Value | (-) Probe | ↔ | (-) Probe |
|---|---|---|---|---|---|
| C-CAN High Open/Short: Voltage |
|
Below 5V (1.5V~3.5V) | HUD*_"C-CAN High" | ↔ | Chassis Ground |
| C-CAN Low Open/Short: Voltage |
HUD*_"C-CAN Low" | ↔ | Chassis Ground |
- Is the voltage within specification?
YES
- Disconnect C-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
- If the measured value is Battery Voltage Level (12V),
→ Repair Short between the harness/connector and Battery Power.
- If the measured value is Ground Level (0V),
→ 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.
- Disconnect C-CAN communication unit/module one by one and monitor DTC to find the cause.
NOTE:
HUD*: "HEAD UP DISPLAY"