Terminal and Connector Inspection
- Many malfunctions in the electrical system are caused by poor contact in harness and terminals. Faults can also be caused by interference by other electrical systems, and mechanical or chemical damage.
- Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
- Was the harness/connector a problem?
YES
- Repair or replace the harness/connector as necessary, and go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Go to "CAN communication Circuit Inspection" as below.
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 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
- 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.
NOTE: HUD*: "HEAD UP DISPLAY". - Disconnect B-CAN communication unit/module one by one and monitor DTC to find the cause.