CAN Register and Communication line Inspection

■ C-CAN register and communication line inspection 1 

1. IG KEY OFF.
2. Connect EPB (& ESP) Module and Each Module connector.
3. Measure resistance between terminal C-CAN HIGH and C-CAN LOW of EPB (& ESP) Module connector.

   Specification:  About 60 Ω

4. Is the measured resistance within specification?

   YES 

   • Check Each Module connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
   • Go to next procedure.

   NO 

   • Go to Next procedure.

■ CAN register and communication line inspection 2 

1. IG KEY OFF
2. Disconnect Cluster, Engine ECM connector.
3. Measure resistance between terminal C-CAN Low and C-CAN High of Cluster. (Component Side)
4. Measure resistance between terminal C-CAN Low and C-CAN High of Engine ECM. (Component Side)

   Specification:  About 120 Ω

5. Is the measured value within specification?

   YES 

   • Go to next procedure.

   NO 

   • If the measured value is out of specification, repair or replace 120Ω CAN register (Inside of Cluster and Engine ECM) and then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.

■ Check short to battery in CAN communication line 

1. IG KEY OFF.
2. Connect EPB (& ESP) Module and each Module connector.
3. IG KEY ON.
4. Measure voltage between C-CAN high terminal of EPB (& ESP) Module and chassis ground.
5. Measure voltage between C-CAN low terminal of EPB (& ESP) Module and chassis ground.

   Specification:  Approx. below 5V

■ Check short to ground in CAN communication line 

1. IG KEY OFF.
2. Connect EPB (& ESP) Module and each Module connector.
3. Measure resistance between C-CAN high terminal of EPB (& ESP) Module and chassis ground.
4. Measure resistance between C-CAN low terminal of EPB (& ESP) Module and chassis ground.

   Specification:  Infinity Ω

5. Is the measured value within specification?

   YES 

   • Check Engine ECM Module, EPB (& ESP) Module and each Module connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
   • Check short to battery in communication line. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.

   NO 

   • Check short to ground in communication line. And then, go to "VERIFICATION OF VEHICLE REPAIR " procedure.
   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.