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6. Inspection of Electrical Equipment
#566 Inspection of turbocharger magnetic valve
• Perform the following tests on the turbocharger magnetic valve.
Replace the valve if found faulty.
(1) Valve activation test
• Gradually increasing from 0 V, apply voltage to the turbocharger
magnetic valve between the following terminals.
• Measure voltage when turbocharger magnetic valve is activated.
(Listen to the operating sound for ON/OFF of the magnet valve.)
(2) Continuity and air tight test
• Test air pressure: 981 kPa {10 kgf/cm
2
}
#835 Inspection of turbine speed sensor and pulse converter
unit
• Test the turbine speed sensor and pulse converter unit as con-
nected to the turbocharger.
• Disconnect the turbine speed sensor and pulse converter unit
from the electronic control unit harness at connectors. Then,
prepare and fit the test harness in place.
• The sensor does not respond to manual rotation of the turbo-
charger compressor wheel. To make the sensor responsive,
start the engine to be idling.
• Measure the maximum level (high-pulse voltage) and minimum
level (low-pulse voltage) of voltage appearing between test con-
nector terminals 4 and 1.
• If the measurement deviates the standard value, replace the tur-
bine speed sensor and pulse converter unit.
Terminals
4-pin connector
1-3 No. 1 magnetic valve
2-4 No. 2 magnetic valve
2-pin connector 1-2 No. 3 magnetic valve
Reference value
(minimum activation voltage)
18 V or less
Standard value
Low-pulse voltage 0 V
High-pulse voltage 5 V
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