Many malfunctions in the electrical system are caused by poor harness and terminals.

Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.

Thoroughly check all connectors (and connections) for looseness, bending, corrosion, contamination, deterioration, and/or damage.

Has a problem been found?

	▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
	▶ Go to "RCV Control Solenoid Valve Circuit Inspection" procedure.

Ignition "OFF".

Refer to "Shop Manual" and disconnect RCV Control Solenoid Valve connector.

Ignition "ON".

Measure voltage between Pin No. 2 (Power) terminal of RCV Control Solenoid Valve harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Control Circuit Inpsection" procedure.
	▶ Repair open or short in power circuit between RCV Control Solenoid Valve and Battery and then go to "Verification of vehicle Repair" procedure.

Ignition "OFF"

Refer to "Shop Manual" and disconnect RCV Control Solenoid Valve connector.

Ignition "ON"

Measure voltage between Pin No. 1 (Control) terminal of RCV Control Solenoid Valve harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Boost Pressure Sensor Circuit Inpsection" procedure.
	▶ Repair open or short in control circuit between RCV Control Solenoid Valve and ECM/PCM and then go to "Verification of vehicle Repair" procedure.

Ignition "OFF".

Refer to "Shop Manual" and disconnect Boost Pressure Sensor (BPS) connector.

Ignition "ON"

Measure voltage between Pin No. 2 (Power) terminal of Boost Pressure Sensor (BPS) harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Ground Circuit Inspection" procedure.
	▶ Repair open or short in power circuit between Boost Pressure Sensor (BPS) and ECM/PCM and then go to "Verification of vehicle Repair" procedure.

Ignition "OFF"

Disconnect Battery (-) terminal.

Refer to "Shop Manual" and disconnect Boost Pressure Sensor (BPS) and ECM/PCM connector.

Measure resistance between Pin No. 4 (Ground) terminal of Boost Pressure Sensor (BPS) harness connector and Pin No. 61 (Ground) terminal of ECM/PCM harness connector.

Is measured value within specification?

	▶ Go to "Signal Circuit Inspection" procedure.
	▶ Repair open or short in ground circuit between Boost Pressure Sensor (BPS) and chassis ground and then go to "Verification of vehicle Repair" procedure.

Ignition "OFF"

Refer to "Shop Manual" and disconnect Boost Pressure Sensor (BPS) connector.

Ignition "ON"

Measure voltage between Pin No. 1 (Signal) terminal of Boost Pressure Sensor (BPS) harness connector and chassis ground.

Is measured value within specification?

	▶ Go to "Component Inspection" procedure.
	▶ Repair open or short in signal circuit between MAP Sensor and ECM/PCM and then go to "Verification of vehicle Repair" procedure.