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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?

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

Ignition switch "OFF"

Refer to "Shop Manual" and disconnect the boost pressure sensor connector.

Ignition Switch "ON"

Measure voltage of power terminal of the boost pressure sensor connector and chassis ground.

Specification : Approx. 5V

Is the measured value within specification?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure.

Ignition Switch "OFF"

Disconnect battery (-) cable.

Refer to "Shop Manual"and disconnect the boost pressure sensor connector.

Measure the resistance between ground terminal of BPS harness connector and chassis ground.

Specification :Approx. below 1 Ω

Ignition switch "OFF"

Refer to "Shop Manual" and disconnect the boost pressure sensor connector.

Ignition switch "ON"

Measure the voltage between power terminal of BPS harness connector and chassis ground.(A)

Measure the voltage between power terminal and ground terminal of BPS harness connector.(B)

Specification :(A) - (B) = below 200 mV

10.

Is the measured value within specification?

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

Ignition switch "OFF"

Refer to "Shop Manual"and disconnect the boost pressure sensor connector.

Ignition switch "ON"

Measure voltage between signal of the boost pressure sensor and chassis ground.

Specification : Difference in (A) and (B) is less than 200 mV

Is the measured value within specification?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure.

Ignition switch "OFF"

Refer to "Shop Manual" and disconnect boost pressure sensor connector.

Ignition switch "ON"

Measure the voltage between signal terminal of BPS harness connector and chassis ground.

Specification : Approx. 5.5V

Is the measured value within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Inspect and repair open or short in circuit, and then go to "Verification of Vehicle Repair" procedure.