Infiniti Q45. Manual — part 526
IGNITION SIGNAL
EC-743
C
D
E
F
G
H
I
J
K
L
M
A
EC
CAUTION:
●
Do not approach to the spark plug and the ignition coil within 50cm. Be careful not to get an
electrical shock while checking, because the electrical discharge voltage becomes 20kV or
more.
●
It might cause to damage the ignition coil if the gap of more than 17 mm is taken.
NOTE:
When the gap is less than 13 mm, the spark might be generated even if the coil is malfunctioning.
17. If NG, replace ignition coil with power transistor.
CONDENSER
1.
Turn ignition switch OFF.
2.
Disconnect condenser harness connector.
3.
Check resistance between condenser terminals 1 and 2.
Removal and Installation
NBS00273
IGNITION COIL WITH POWER TRANSISTOR
Refer to
Resistance: Above 1 M
Ω
[at 25
°
C (77
°
F)]
PBIB0794E
EC-744
REFRIGERANT PRESSURE SENSOR
REFRIGERANT PRESSURE SENSOR
PFP:92136
Component Description
NBS0027G
The refrigerant pressure sensor is installed at the condenser of the
air conditioner system. The sensor uses an electrostatic volume
pressure transducer to convert refrigerant pressure to voltage. The
voltage signal is sent to ECM, and ECM controls cooling fan system.
PBIB0037E
PBIB2657E
REFRIGERANT PRESSURE SENSOR
EC-745
C
D
E
F
G
H
I
J
K
L
M
A
EC
Wiring Diagram
NBS0027H
TBWM0586E
EC-746
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
NBS0027I
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 switch ON.
3.
Check voltage between ECM terminal 70 and ground with CON-
SULT-II or tester.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 2.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
49
L
Sensor power supply
(Refrigerant pressure sen-
sor)
[Ignition switch: ON]
Approximately 5V
67
B
Sensor ground
(MAF sensor, IAT sensor,
ECT sensor, FTT sensor,
EVAP control system pres-
sure sensor, PSP sensor,
ICC steering switch, ASCD
steering switch, Refrigerant
pressure sensor)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
70
P
Refrigerant pressure sensor
[Engine is running]
●
Warm-up condition
●
Both A/C switch and blower fan motor
switch: ON (Compressor operates)
1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E
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