4413004

1.

Many malfunctions in the electrical system are caused by poor harness(es) and terminal condition. 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?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "Power Circuit Inspection" procedure.

1.

Ignition "ON" & Engine "OFF".

2.

Measure voltage between power terminal of the steering angle sensor, Yaw rate & lateral G sensor, G sensor harness connector and chassis ground.

Specification : Approx. 12V (steering angle sensor, Yaw rate & lateral G sensor), Approx. 5V (G sensor)

3.

Is the measured value within specifications?

▶ 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.

▶ Repair open or short in power circuit between HECU harness connector and steering angle sensor, Yaw rate & lateral G sensor, G sensor harness connector and then go to "Verification of vehicle Repair" procedure.

If there is no problem in power circuit, 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.