Terminal and Connector Inspection
1.

Many malfunctions in the electrical system are caused by poor harness and terminals.

Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

2.

Thoroughly check all connectors(and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

3.

Has a problem been found?

▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.

▶ Go to next procedure.

CAN register and communication line inspection
■ CAN register and communication line inspection 1
1.

IG Key "OFF".

2.

Connect ECM, ESP, EPS, BSD connector.

3.

Measure registance between CAN High terminal and CAN Low terminal of diagnostic connector.

Specification : About 60Ω

4.

Is the measured resistance within specification?

▶ Check BSD(RH) 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.

▶ If the measured value is lower than 10Ω, repair or replace CAN High and CAN Low are short each other. And then, go to "Verification of Vehicle Repair" procedure.

▶ If the measured value is ∞ Ω, repair or replace the open in CAN High / CAN Low circuit. And then, go to "Verification of Vehicle Repair" procedure.

CAN communcation line inspection
■ Check short to battery in CAN communication line
1.

IG Key "OFF".

2.

Disconnect ECM, EPS(MDPS), and BSD connector.

3.

IG KEY OFF.

4.

Measure voltage between CAN high terminal of diagnostic connector and chassis ground.

5.

Measure voltage between CAN low terminal of diagnostic connector and chassis ground.

Specification : About 0V

■ Check short to ground in CAN communication line
6.

IG KEY OFF.

7.

Disconnect ECM, EPS(MDPS), and BSD ECU connector.

8.

Measure resistnace between CAN high terminal of diagnostic connector and chassis ground.

9.

Measure resistance between CAN low terminal of diagnostic connector and chassis ground.

Specification : ∞ Ω

10.

Is the measured value within specification?

▶ Check BSD ECU(RH) 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.

▶ Check short to ground in communication line. And then, go to "Verification of Vehicle Repair" procedure.

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