W/Harness Inspection

Terminal and Connector Inspection

1. 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.
2. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
3. Has a problem been found ?
YES
1) Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
1) Go to "Ground Circuit Inspection" procedure.

Ground Circuit inspection

1. Ignition "OFF".
2. Disconnect Yaw Rate & Lateral G sensor connector.
3. Measure resistance between terminal "4" of the Yaw Rate & Lateral G sensor harness connector and chassis ground.
A. Specification: Approx. below 1 Ohm




4. Is the measured resistance within specifications ?
YES
1) Go to "Signal Circuit Inspection" procedure.
NO
1) Check for open or short in the Yaw Rate & Lateral G sensor harness between terminal "4" of the Yaw Rate & Lateral G sensor harness connector and terminal "23" of the HECU harness connector. Repair as necessary and then go to "Verification of vehicle Repair" procedure.

Signal Circuit Inspection

1. Ignition "ON" & Engine "OFF".
2. Measure voltage, waveform between terminal "9, 41" of the HECU harness connector and chassis ground with shaking the sensor.
A. Specification: Approx. 2.5V (in case of standstill)
It is normal if the signal is changed in normal range (approx. 0.1V ~ 4.9V) during shaking the sensor.




3. Is the measured voltage, waveform within specifications ?
YES
1) If OK, Substitute with a known-good HECU and check for proper operation. If problem is corrected, replace HECU and then go to "Verification of Vehicle Repair" procedure.
NO
1) Check for open or short in the Yaw Rate & Lateral G sensor harness between terminal "1, 2" of the Yaw Rate & Lateral G sensor harness connector and terminal "41, 9" of the HECU harness connector. Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
2) If OK, Go to "Component Inspection" procedure.