Nissan Note [445/1872] Repair or replace ground connections

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Nissan Note [445/1872] Repair or replace ground connections
REFRIGERANT PRESSURE SENSOR
EC-445
[CR (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
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
BBS0033W
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 69 and ground with CON-
SULT-II or tester.
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
2. CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower fan switch OFF.
2. Turn ignition switch OFF.
3. Loosen and retighten ground screws on the body.
Refer to EC-133, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
TERMI-
NAL
NO.
WIRE
COLOR
ITEM CONDITION DATA (DC Voltage)
46 W
Sensor power supply
(Refrigerant pressure sensor)
[Ignition switch: ON] Approximately 5V
57 Y
Sensor ground
(Refrigerant pressure sensor)
[Engine is running]
Warm-up condition
Idle speed
Approximately 0V
69 BR Refrigerant pressure sensor
[Engine is running]
Warm-up condition
Both A/C switch and blower fan switch: ON.
(Compressor operates.)
1.0 - 4.0V
Voltage: 1.0 - 4.0V
MBIB0035E
1. Body ground E44 2. Body ground E45 3. Body ground E28
MBIB1502E

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