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EC-1438
[YD (WITH EURO-OBD)]
REFRIGERANT PRESSURE SENSOR
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
Diagnostic Procedure BBS002IA
1. CHECK REFRIGERANT PRESSURE SENSOR OVERALL FUNCTION
1. Start engine and warm it up to normal operating temperature.
2. Turn A/C switch and blower fan switch ON.
3. Check voltage between ECM terminal 53 and ground with CON-
SULT-II or tester.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
53 Y
Refrigerant pressure sen-
sor
[Engine is running]
● Warm-up condition
● Both A/C switch and blower fan switch: ON
(Compressor operates)
1.0 - 4.0V
64 W
Sensor power supply
(Turbocharger boost sen-
sor / Differential exhaust
pressure sensor / Throttle
position sensor / Refriger-
ant pressure sensor)
[Ignition switch ON] Approximately 5.3V
72 B
Sensor ground
(Throttle position sensor /
Refrigerant pressure sen-
sor)
[Engine is running]
● Warm-up condition
● Idle speed
Approximately 0.3V
Voltage: 1.0 - 4.0V
MBIB1248E
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