Page 2233 of 4647
EC-704
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
REFRIGERANT PRESSURE SENSORPFP:92136
Component DescriptionNBS00585
The refrigerant pressure sensor (1) 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.
PBIA9537J
PBIB2657E
Page 2234 of 4647
REFRIGERANT PRESSURE SENSOR
EC-705
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS00586
TBWT0998E
Page 2235 of 4647
![INFINITI M35 2007 Factory Service Manual EC-706
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground t INFINITI M35 2007 Factory Service Manual EC-706
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground t](/manual-img/42/57024/w960_57024-2234.png)
EC-706
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
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 ProcedureNBS00587
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 70 and ground with CON-
SULT-II or tester.
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
49 B/YSensor power supply
(Refrigerant pressure sen-
sor, Battery current sensor)[Ignition switch: ON]Approximately 5V
67 B/W Sensor ground[Engine is running]
Warm-up condition
Idle speedApproximately 0V
70 L/R 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
Page 2236 of 4647
![INFINITI M35 2007 Factory Service Manual REFRIGERANT PRESSURE SENSOR
EC-707
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
2. CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower switch OFF.
2. Stop engine.
3. Turn ign INFINITI M35 2007 Factory Service Manual REFRIGERANT PRESSURE SENSOR
EC-707
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
2. CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower switch OFF.
2. Stop engine.
3. Turn ign](/manual-img/42/57024/w960_57024-2235.png)
REFRIGERANT PRESSURE SENSOR
EC-707
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
2. CHECK GROUND CONNECTIONS
1. Turn A/C switch and blower switch OFF.
2. Stop engine.
3. Turn ignition switch OFF.
4. Loosen and retighten two ground screws on the body.
Refer to EC-160, "
Ground Inspection" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace ground connections.
3. CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1. Disconnect refrigerant pressure sensor (1) harness connector.
2. Turn ignition switch ON.
3. Check voltage between refrigerant pressure sensor terminal 1
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, F2
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
1. Body ground M70 2. Body ground M16
PBIB2782E
PBIA9537J
Voltage: Approximately 5V
PBIB0188E
Page 2237 of 4647
![INFINITI M35 2007 Factory Service Manual EC-708
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harne INFINITI M35 2007 Factory Service Manual EC-708
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harne](/manual-img/42/57024/w960_57024-2236.png)
EC-708
[VQ35DE]
REFRIGERANT PRESSURE SENSOR
Revision: 2007 April2007 M35/M45
5. CHECK REFRIGERANT PRESSURE SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch OFF.
2. Disconnect ECM harness connector.
3. Check harness continuity between refrigerant pressure sensor terminal 3 and ECM terminal 67.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, F2
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
7. CHECK REFRIGERANT PRESSURE SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check harness continuity between ECM terminal 70 and refrigerant pressure sensor terminal 2.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.
Harness connectors E11, F2
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK INTERMITTENT INCIDENT
Refer to EC-153, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> Replace refrigerant pressure sensor.
NG >> Repair or replace.
Removal and InstallationNBS00588
REFRIGERANT PRESSURE SENSOR
Refer to ATC-166, "Removal and Installation of Refrigerant Pressure Sensor" . Continuity should exist.
Continuity should exist.
Page 2238 of 4647
![INFINITI M35 2007 Factory Service Manual SNOW MODE SWITCH
EC-709
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
SNOW MODE SWITCHPFP:25310
DescriptionNBS0058Q
NOTE:
If DTC U1000 or U1001 are displayed, first perform the t INFINITI M35 2007 Factory Service Manual SNOW MODE SWITCH
EC-709
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
SNOW MODE SWITCHPFP:25310
DescriptionNBS0058Q
NOTE:
If DTC U1000 or U1001 are displayed, first perform the t](/manual-img/42/57024/w960_57024-2237.png)
SNOW MODE SWITCH
EC-709
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
SNOW MODE SWITCHPFP:25310
DescriptionNBS0058Q
NOTE:
If DTC U1000 or U1001 are displayed, first perform the trouble diagnosis for DTC U1000, U1001.
Refer to EC-161, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
If DTC U1010 is displayed, first perform the trouble diagnosis for DTC U1010.
Refer to EC-164, "
DTC U1010 CAN COMMUNICATION" .
The snow mode switch signal is sent to the “unified meter and A/C amp.” from the snow mode switch. The
“unified meter and A/C amp.” then sends the signal to the ECM by CAN communication line.
The snow mode is used for driving or starting the vehicle on snowy roads or slippery areas. If the snow mode
is activated, the vehicle speed will not be accelerated immediately than your original pedal in due to avoid the
vehicle slip. In other words, ECM controls the rapid engine torque change by controlling the electric throttle
control actuator operating speed.
CONSULT-II Reference Value in the Data Monitor ModeNBS0058R
MONITOR ITEM CONDITION SPECIFICATION
SNOW MODE SW
Ignition switch: ONSNOW MODE SW: ON ON
SNOW MODE SW: OFF OFF
Page 2239 of 4647
EC-710
[VQ35DE]
SNOW MODE SWITCH
Revision: 2007 April2007 M35/M45
Wiring DiagramNBS0058S
TBWT1003E
Page 2240 of 4647
![INFINITI M35 2007 Factory Service Manual SNOW MODE SWITCH
EC-711
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
Diagnostic ProcedureNBS0058T
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Se INFINITI M35 2007 Factory Service Manual SNOW MODE SWITCH
EC-711
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
Diagnostic ProcedureNBS0058T
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Se](/manual-img/42/57024/w960_57024-2239.png)
SNOW MODE SWITCH
EC-711
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
MA
EC
Revision: 2007 April2007 M35/M45
Diagnostic ProcedureNBS0058T
1. CHECK SNOW MODE SWITICH OVERALL FUNCTION-I
1. Turn ignition switch ON.
2. Select “SNOW MODE SW” in “DATA MONITOR” mode with
CONSULT-II.
3. Check “SNOW MODE SW” indication under the following condi-
tions.
OK or NG
OK >> GO TO 2.
NG >> GO TO 3.
2. CHECK SNOW MODE SWITICH OVERALL FUNCTION-II
1. Turn ignition switch ON.
2. Start engine.
3. Check the snow mode indicator in the snow mode switch under the following condition.
OK or NG
OK >>INSPECTION END
NG >> GO TO 7.
3. CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to DI-31, "
SELF-DIAG RESULTS" .
OK or NG
OK >> GO TO 4.
NG >> Go to DI-28, "
UNIFIED METER AND A/C AMP" .
4. CHECK SNOW MODE SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect snow mode switch harness connector.
3. Turn ignition switch ON.
4. Check voltage between snow mode switch terminal 1 and
ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
PBIB2009E
CONDITION INDICATION
Snow mode switch: ON ON
Snow mode switch: OFF OFF
Voltage: Battery voltage.
PBIB2562E