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".
Measure voltage between terminal "2" of the steering angle sensor harness connector and chassis ground.
Specification : Approx. B+
Is the measured voltage within specifications?
YES
Go to "Ground Circuit Inspection" procedure.
NO
Check for damaged harness and poor connection between the battery terminal(+) and terminal "2" of the steering angle sensor harness connector. Check for open or blown 10A ABS fuse referring to "Circuit Diagram". Repair as necessary and then go to "Verification of vehicle Repair" procedure.
Ignition "OFF".
Disconnect SAS connector.
Measure resistance between terminal "1" of the steering angle sensor harness connector and chassis ground.
Specification : Approx. below 1Ω
Is the measured resistance within specifications?
YES
Go to "CAN Circuit Inspection" procedure.
NO
Check for damaged harness and poor connection between terminal "15" of the HECU harness connector and terminal "1" of the steering angle sensor harness connector . Repair as necessary and then go to "Verification of vehicle Repair" procedure.
Ignition "OFF".
Disconnect SAS connector.
Measure resistance between terminal "3,4" of the steering angle sensor harness connector.
Specification : Approx. 60Ω
Is the measured resistance within specifications?
YES
Go to "CAN Bus Short (to ground) Inspection" procedure.
NO
Check for damaged harness and poor connection between terminal "3,4" of the steering angle sensor harness connector. Repair as necessary and then go to "Verification of vehicle Repair" procedure.
Ignition "OFF".
Disconnet the HECU harness connector.
Measure resistance between terminal "3,4" of the HECU harness connector and chassis ground.
Specification : Approx. ∞ Ω
Is the measured resistance within specifications?
YES
Go to "CAN Bus Short (between HIGH and LOW) Inspection" procedure.
NO
Check for short to ground in CAN HIGH signal harness in case of abnormal resistance measured between terminal "3" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification of vehicle Repair" procedure.
Check for short to ground in CAN LOW signal harness in case of abnormal resistance measured between terminal "4" of the HECU harness connector and chassis ground. Repair as necessary and then go to "Verification of vehicle Repair" procedure.
Ignition "OFF".
Disconnet all the connetor related to CAN such as HECU, PCU, EPS, ECS harness connector.
Measure resistance between terminal "3,4" of the HECU harness.
Specification : Approx. 120 Ω
Is the measured resistance within specifications?
YES
Go to "Verification of Vehicle Repair" procedure.
NO
Check for short in CAN signal harness between terminal "3" of the HECU harness connector and terminal "4" of the HECU harness connector. Repair as necessary and then go to "Verification of vehicle Repair" procedure.
