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 "CAN communication circuit inspection" procedure.

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

IG KEY OFF.

2.

Connect ECM/PCM, 4WD ECM, TCM, ABS, SPAS connector.

3.

Measure registance between terminal 3 and 11 of diagnostic connector.

Specification : About 60 Ω

4.

Is the measured resistance within specification ?

▶ Check EPS/MDPS ECU 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 out of specification, repair or replace 120Ω CAN register(Inside of ECM/PCM and Cluster) and then, go to "Verification of Vehicle Repair" 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.

▶ Go to next procedure.

■ CAN communication circuit inspection (EPS ↔ SPAS ECU)
5.

Ignition "OFF"

6.

Disconnect EPS connector and SPAS ECU connector

7.

Measure the resistance between CAN-HIGH terminal of EPS harness connector and CAN-HIGH terminal of SPAS harness connector.

8.

Measure the resistance between CAN-LOW terminal of EPS harness connector and CAN-LOW terminal of SPAS harness connector.

Specification : below 1Ω

9.

Is the measured resistance within specification ?

▶ Substitute with a known - good ECM/PCM and check for proper operation. If the problem is corrected, replace ECM/PCM and go to "Verification of Vehicle Repair" procedure.

▶ Check for open/short in harness.

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

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