3.
Has a problem been found?
YES
a.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
a.
Go to "Power Circuit Inspection" procedure.
Many malfunctions in the electrical system are caused by poor harness(es) and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
YES
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
Go to "Power Circuit Inspection" procedure.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal "1" of the HECU harness connector and chassis ground.
Specification : Approx 2.15V~3.5V
Is the measured voltage within specifications?
YES
Go to "Signal Circuit Inspection" procedure.
NO
Go to "Component Inspection" procedure.
Ignition "ON" & Engine "OFF".
Measure voltage between terminal "2" of the HECU harness connector and chassis ground.
Specification : Approx 2.15V~3.5V
Is the measured voltage within specifications?
YES
Fault is intermittent caused by open or short wheel speed sensor harness(FL), faulty wheel speed sensor and/or faulty HECU or was repaired and HECU memory was not cleared. Go to the applicable troubleshooting procedure.
NO
Check for open or short in wheel speed sensor harness between terminal "1" of the HECU harness connector and terminal "2" of the HECU harness connector. Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Measure a resistance of wheel speed sensor. If NG, replace the wheel speed sensor and then go to "Verification of Vehicle Repair" procedure.
■Specification : Approx. 1.385±0.11㏀
