Nissan Pathfinder (2005 year). Instruction — part 230
REFRIGERANT PRESSURE SENSOR
EC-691
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EC
2005 Pathfinder
REFRIGERANT PRESSURE SENSOR
PFP:92136
Component Description
UBS00KII
The refrigerant pressure sensor is installed at the liquid tank 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.
BBIA0564E
SEF099XA
EC-692
REFRIGERANT PRESSURE SENSOR
2005 Pathfinder
Wiring Diagram
UBS00KIJ
BBWA1776E
REFRIGERANT PRESSURE SENSOR
EC-693
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EC
2005 Pathfinder
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
UBS00KIK
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.
2.
CHECK GROUND CONNECTIONS
1.
Turn A/C switch and blower switch OFF.
2.
Turn ignition switch OFF.
3.
Loosen and retighten three ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
49
P
Sensor power supply
(Refrigerant pressure sen-
sor/Battery current sensor)
[Ignition switch: ON]
Approximately 5V
67
B
Sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
70
BR
Refrigerant pressure sensor
[Engine is running]
●
Warm-up condition
●
Both A/C switch and blower switch: ON
(Compressor operates)
1.0 - 4.0V
Voltage: 1.0 - 4.0V
PBIB1188E
BBIA0539E
EC-694
REFRIGERANT PRESSURE SENSOR
2005 Pathfinder
3.
CHECK REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect refrigerant pressure sensor harness connector.
2.
Turn ignition switch ON.
3.
Check voltage between refrigerant pressure sensor terminal 3
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 E5, F14
●
Harness for open or short between ECM and refrigerant pressure sensor
>> Repair harness or connectors.
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 1 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 E5, F14
●
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.
BBIA0564E
Voltage: Approximately 5V
PBIB1872E
Continuity should exist.
REFRIGERANT PRESSURE SENSOR
EC-695
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2005 Pathfinder
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 E5, F14
●
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-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> Replace refrigerant pressure sensor.
NG
>> Repair or replace.
Removal and Installation
UBS00KIL
REFRIGERANT PRESSURE SENSOR
Refer to
ATC-162, "Removal and Installation for Refrigerant Pressure Sensor"
or
Installation for Refrigerant Pressure Sensor"
.
Continuity should exist.
EC-696
ELECTRICAL LOAD SIGNAL
2005 Pathfinder
ELECTRICAL LOAD SIGNAL
PFP:25350
Description
UBS00KIM
The electrical load signal (Headlamp switch signal, etc.) is transferred through the CAN communication line
from BCM to ECM via IPDM E/R.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KIN
Specification data are reference values.
Diagnostic Procedure
UBS00KIO
1.
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-I
1.
Turn ignition switch ON.
2.
Connect CONSULT-II and select “DATA MONITOR” mode.
3.
Select “LOAD SIGNAL” and check indication under the following
conditions.
OK or NG
OK
>> GO TO 2.
NG
>> GO TO 3.
2.
CHECK LOAD SIGNAL CIRCUIT OVERALL FUNCTION-II
Check “LOAD SIGNAL” indication under the following conditions.
OK or NG
OK
>> INSPECTION END
NG
>> GO TO 4.
3.
CHECK REAR WINDOW DEFOGGER SYSTEM
Refer to
.
>> INSPECTION END
4.
CHECK HEADLAMP SYSTEM
Refer to
or
LT-31, "HEADLAMP (FOR CANADA) - DAYTIME LIGHT SYS-
.
>> INSPECTION END
MONITOR ITEM
CONDITION
SPECIFICATION
LOAD SIGNAL
●
Ignition switch: ON
Rear window defogger switch is ON
and/or lighting switch is in 2nd.
ON
Rear window defogger switch is OFF
and lighting switch is OFF.
OFF
Condition
Indication
Rear window defogger switch ON
ON
Rear window defogger switch OFF
OFF
PBIB0103E
Condition
Indication
Lighting switch ON at 2nd position
ON
Lighting switch OFF
OFF
PBIB0103E
ASCD BRAKE SWITCH
EC-697
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2005 Pathfinder
ASCD BRAKE SWITCH
PFP:25320
Component Description
UBS00KIP
When the brake pedal is depressed, ASCD brake switch is turned
OFF and stop lamp switch is turned ON. ECM detects the state of
the brake pedal by this input of two kinds (ON/OFF signal).
Refer to
EC-30, "AUTOMATIC SPEED CONTROL DEVICE (ASCD)"
for the ASCD function.
CONSULT-II Reference Value in Data Monitor Mode
UBS00KIQ
Specification data are reference values.
BBIA0560E
MONITOR ITEM
CONDITION
SPECIFICATION
BRAKE SW 1
(ASCD brake switch)
●
Ignition switch: ON
●
Brake pedal: Fully released
ON
●
Brake pedal: Slightly depressed
OFF
BRAKE SW 2
(stop lamp switch)
●
Ignition switch: ON
●
Brake pedal: Fully released
OFF
●
Brake pedal: Slightly depressed
ON
EC-698
ASCD BRAKE SWITCH
2005 Pathfinder
Wiring Diagram
UBS00KIR
BBWA1777E
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