Mitsubishi 6M70, Workshop Manual

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17-16
7. Inspection of Electrical Equipment
#201 Inspection of relay (normally open, 5 pins)
•
Perform a continuity check and an operation check. If there is
any abnormality, replace the relay.
#305 Inspection of intake air temperature sensor
•
Place the sensor in a container filled with engine oil.
• Heat the oil to each of the specified temperatures. Stir the oil
well while doing so.
• Measure the resistance between terminals 1 and 2.
• If either measurement is out of specification, replace the sensor.
#530 Inspection of exhaust gas recirculation magnetic valve
•
Perform the following checks. If there is any abnormality, replace
the exhaust gas recirculation magnetic valve.
(1) Check of operation
• Gradually increase from zero the voltage applied to terminals 3
and 6 (magnetic valve 1), 2 and 5 (magnetic valve 2) and 1 and
4 (magnetic valve 3).
• Observe the voltage when the exhaust gas recirculation magnet-
ic valve operates.
(Determine the magnetic valve’s OFF-ON operation from the op-
erating sound.)
(2) Check of continuity and airtightness
• Air pressure applied during check: 930 kPa {9.5 kgf/cm
2
}
Standard value
0 ° C 15 k Ω
20
°
C 6.514 k
Ω
80 ° C 0.874 k Ω
Standard value
(min. operating voltage)
18 V or lower
+3.78
–2.94
+1.437
–1.147
+0.136
–0.115
EXHAUST GAS RECIRCULATION SYSTEM