Terminal and Connector Inspection
1.

Many malfunctions in the electrical system are caused by poor harness and terminal condition. 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 if necessary and then go to "Verification of Vehicle Repair" procedure.

▶ Go to "W/Harness Inspection" procedure.

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

IG KEY OFF.

2.

Connect PCM and Each Module connector.

3.

Measure registance between terminal 3 and 11 of diagnostic connector.

Specification : About 60 Ω

4.

Is the measured registance within specification ?

▶ Check ECM 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 ∞ , 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 register and communication line inspection 2
5.

IG KEY OFF

6.

Disconnect PCM and Instrument Cluster connectors.

7.

Measure resistance between terminal CAN Low and CAN High of ECM.

Specification :Approx. 120Ω

8.

Is the measured resistance within specifications?

▶ Go to next procedure.

▶ If the measured value is out of specification, repair or replace 120Ω CAN register(Inside of 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.

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

IG KEY OFF

2.

Disconnect PCM, TPMS ECU, TCM and ABS connector.

3.

IG KEY OFF

4.

Measure voltage between CAN high terminal(

10.

Is the measured value within specification ?

▶ Check PCM, TPMS ECU, TCM and ABS 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.

Яндекс.Метрика