Infiniti FX35 / FX45. Manual - part 456

REFRIGERANT PRESSURE SENSOR

EC-585

< SERVICE INFORMATION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

OK

>> GO TO 9.

NG

>> GO TO 8.

8.

DETECT MALFUNCTIONING PART

Check the following.
• Harness connectors E18, F48
• 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-139

.

OK or NG

OK

>> Replace refrigerant pressure sensor.

NG

>> Repair or replace. 

Removal and Installation

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REFRIGERANT PRESSURE SENSOR

Refer to 

ATC-137, "Removal and Installation of Refrigerant Pressure Sensor"

.

EC-586

< SERVICE INFORMATION >

[VQ35DE]

SNOW MODE SWITCH

SNOW MODE SWITCH

Description

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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-III Reference Value in Data Monitor Mode

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MONITOR ITEM

CONDITION

SPECIFICATION

SNOW MODE SW

• Ignition switch: ON

Snow mode switch: ON

ON

Snow mode switch: OFF

OFF

SNOW MODE SWITCH

EC-587

< SERVICE INFORMATION >

[VQ35DE]

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F

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EC

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Wiring Diagram

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Diagnosis Procedure

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1.

CHECK SNOW MODE SWITICH OVERALL FUNCTION-I

1.

Turn ignition switch ON.

2.

Select “SNOW MODE SW” in “DATA MONITOR” mode with CONSULT-III.

3.

Check “SNOW MODE SW” indication under the following conditions.

TBWM1415E

EC-588

< SERVICE INFORMATION >

[VQ35DE]

SNOW MODE SWITCH

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-27, "CONSULT-III Function (METER/M&A)"

.

OK or NG

OK

>> GO TO 4.

NG

>> Go to 

DI-26

.

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-III or tester.

OK or NG

OK

>> GO TO 6.

NG

>> GO TO 5.

5.

DETECT MALFUNCTIONING PART

Check the following.
• Fuse block (J/B) M1
• 10A fuse
• Harness for open or short between snow mode switch and fuse.

>> Repair open circuit or short to ground or short to power in harness or connectors.

6.

CHECK SNOW MODE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT

1.

Turn ignition switch OFF.

2.

Disconnect “unified meter and A/C amp.” harness connector.

3.

Check harness continuity between snow mode switch terminal 4 and “unified meter and A/C amp.” termi-
nal 12. Refer to Wiring Diagram.

CONDITION

INDICATION

Snow mode switch: ON

ON

Snow mode switch: OFF

OFF

CONDITION

INDICATOR

Snow mode switch: ON

Illuminated

Snow mode switch: OFF

Not illuminated

Voltage: Battery voltage.

PBIB2562E