Nissan Pathfinder (2009 year). Manual — part 527
PCS-6
< FUNCTION DIAGNOSIS >
[IPDM E/R]
RELAY CONTROL SYSTEM
System Description
INFOID:0000000003935616
IPDM E/R activates the internal control circuit to perform the relay ON-OFF control according to the input sig-
nals from various sensors and the request signals received from control units via CAN communication.
CAUTION:
IPDM E/R integrated relays cannot be removed.
Control relay
Input/output
Transmit unit
Control part
Reference
page
Front fog lamp relay
Front fog lamp request signal
BCM (CAN)
Front fog lamps
(if equipped)
• Headlamp (LH) high relay
• Headlamp (RH) high relay
• Headlamp low relay
• High beam request signal
• Low beam request signal
BCM (CAN)
• Headlamp high
• Headlamp low
Tail lamp relay
Position light request signal
BCM (CAN)
• Parking lamps
• License plate lamps
• Tail lamps
• Trailer tow relay
• Illumination system
• Front wiper relay
• Front wiper high relay
Front wiper request signal
BCM (CAN)
Front wiper motor
Rear window defogger relay
Rear window defogger request signal
BCM (CAN)
Rear window defogger
A/C relay
A/C request signal
• BCM (CAN)
• ECM (CAN)
A/C compressor
Starter relay
Ignition switch START signal
TCM
Starter motor
Cooling fan relay
Cooling fan request signal
ECM (CAN)
Cooling fan relay
Heated mirror relay
Heated mirror request signal
BCM (CAN)
Door mirrors
ECM relay
ECM relay control signal
ECM (CAN)
ECM relay
Throttle control motor relay
Throttle control motor control signal
ECM (CAN)
Throttle control motor relay
Fuel pump relay
Fuel pump request signal
ECM (CAN)
Fuel pump
Ignition relay
Ignition switch ON signal
Ignition switch
Ignition relay
2009 Pathfinder
PCS
RELAY CONTROL SYSTEM
PCS-7
< FUNCTION DIAGNOSIS >
[IPDM E/R]
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Component Parts Location
INFOID:0000000003935617
1.
IPDM E/R E118, E119, E120, E121,
E122, E123, E124
ALMIA0310ZZ
2009 Pathfinder
PCS-8
< FUNCTION DIAGNOSIS >
[IPDM E/R]
POWER CONTROL SYSTEM
POWER CONTROL SYSTEM
System Diagram
INFOID:0000000003935618
System Description
INFOID:0000000003935619
COOLING FAN CONTROL
IPDM E/R controls the cooling fan according to the status of the cooling fan speed request signal received
from ECM via CAN communication. Refer to
LAN-57, "CAN System Specification Chart"
.
ALMIA0111GB
2009 Pathfinder
PCS
SIGNAL BUFFER SYSTEM
PCS-9
< FUNCTION DIAGNOSIS >
[IPDM E/R]
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SIGNAL BUFFER SYSTEM
System Diagram
INFOID:0000000003935620
System Description
INFOID:0000000003935621
IPDM E/R reads the status of the oil pressure switch and transmits the oil pressure switch signal to BCM via
CAN communication. Refer to
.
AWNIA0174GB
2009 Pathfinder
PCS-10
< FUNCTION DIAGNOSIS >
[IPDM E/R]
POWER CONSUMPTION CONTROL SYSTEM
POWER CONSUMPTION CONTROL SYSTEM
System Diagram
INFOID:0000000003935622
System Description
INFOID:0000000003935623
OUTLINE
• IPDM E/R incorporates a power consumption control function that reduces the power consumption accord-
ing to the vehicle status.
• IPDM E/R changes its status (control mode) with the sleep wake up signal received from BCM via CAN com-
munication.
Normal mode (wake-up)
- CAN communication is normally performed with other control units.
- Individual unit control by IPDM E/R is normally performed.
Low power consumption mode (sleep)
- Low power consumption control is active.
- CAN transmission is stopped.
SLEEP MODE ACTIVATION
• IPDM E/R judges that the sleep-ready conditions are fulfilled when the ignition switch is OFF and none of the
conditions below are present. Then it transmits a sleep-ready signal (ready) to BCM via CAN communica-
tion.
- Front wiper fail-safe operation
- Outputting signals to actuators
- Switches or relays operating
- Auto active test is starting
- Emergency OFF
- Output requests are being received from control units via CAN communication.
• IPDM E/R stops CAN communication and enters the low power consumption mode when it receives a sleep
wake up signal (sleep) from BCM and the sleep-ready conditions are fulfilled.
WAKE-UP OPERATION
• IPDM E/R changes from the low power consumption mode to the normal mode when it receives a sleep
wake-up signal (wake up) from BCM or any of the following conditions is fulfilled. In addition, it transmits a
sleep-ready signal (not-ready) to BCM via CAN communication to report the CAN communication start.
- Ignition switch ON
- An output request is received from a control unit via CAN communication.
ALCIA0030GB
2009 Pathfinder
PCS
POWER CONSUMPTION CONTROL SYSTEM
PCS-11
< FUNCTION DIAGNOSIS >
[IPDM E/R]
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Component Parts Location
INFOID:0000000003935624
1.
IPDM E/R E118, E119, E120, E121,
E122, E123, E124
2.
Combination meter M24
3.
BCM (view with lower instrument
panel LH removed) M18, M19, M20
ALMIA0311ZZ
2009 Pathfinder
PCS-12
< FUNCTION DIAGNOSIS >
[IPDM E/R]
DIAGNOSIS SYSTEM (IPDM E/R)
DIAGNOSIS SYSTEM (IPDM E/R)
Diagnosis Description
INFOID:0000000003935625
AUTO ACTIVE TEST
Description
In auto active test mode, the IPDM E/R sends a drive signal to the following systems to check their operation.
• Oil pressure low warning indicator
• Oil pressure gauge
• Rear window defogger
• Front wipers
• Tail, license and parking lamps
• Front fog lamps (if equipped)
• Headlamps (Hi, Lo)
• A/C compressor (magnetic clutch)
• Cooling fan
Operation Procedure
1.
Close the hood and front door RH, and lift the wiper arms from the windshield (to prevent windshield dam-
age due to wiper operation).
NOTE:
When auto active test is performed with hood opened, sprinkle water on windshield before hand.
2.
Turn ignition switch OFF.
3.
Turn the ignition switch ON and, within 20 seconds, press the front door switch LH 10 times. Then turn the
ignition switch OFF.
4.
Turn the ignition switch ON within 10 seconds. After that the horn sounds once and the auto active test
starts.
5.
After a series of the following operations is repeated 3 times, auto active test is completed.
NOTE:
When auto active test mode has to be cancelled halfway through test, turn ignition switch OFF.
CAUTION:
• If auto active test mode cannot be actuated, check door switch system. Refer to
(with Intelligent Key system),
(without Intelligent Key system).
• Do not start the engine.
Inspection in Auto Active Test Mode
When auto active test mode is actuated, the following 7 steps are repeated 3 times.
Operation
sequence
Inspection Location
Operation
1
Rear window defogger
10 seconds
2
Front wipers
LO for 5 seconds
→
HI for 5 seconds
WKIA4991E
2009 Pathfinder
PCS
DIAGNOSIS SYSTEM (IPDM E/R)
PCS-13
< FUNCTION DIAGNOSIS >
[IPDM E/R]
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Concept of auto active test
• IPDM E/R starts the auto active test with the door switch signals transmitted by BCM via CAN communica-
tion. Therefore, the CAN communication line between IPDM E/R and BCM is considered normal if the auto
active test starts successfully.
• The auto active test facilitates troubleshooting if any systems controlled by IPDM E/R cannot be operated.
Diagnosis chart in auto active test mode
3
Tail, license, front fog and parking lamps
10 seconds
4
Headlamps
LO for 10 seconds
→
HI on-off for 5 seconds
5
A/C compressor (magnetic clutch)
ON
⇔
OFF 5 times
6
Cooling fan
10 seconds
Operation
sequence
Inspection Location
Operation
AWMIA1124GB
Symptom
Inspection contents
Possible cause
Oil pressure low warning indicator does not operate
Perform auto active test.
Does the oil pressure low
warning indicator operate?
YES
• IPDM E/R signal input cir-
cuit
• ECM signal input circuit
• CAN communication signal
between ECM and combi-
nation meter
NO
• CAN communication signal
between IPDM E/R, BCM
and combination meter
Oil pressure gauge does not operate
Perform auto active test.
Does the oil pressure gauge
operate?
YES
IPDM E/R signal input circuit
NO
• CAN communication signal
between IPDM E/R, BCM
and combination meter
Rear window defogger does not operate
Perform auto active test.
Does the rear window defog-
ger operate?
YES
BCM signal input circuit
NO
• Harness or connector be-
tween A/C and AV switch
assembly and AV control
unit
• CAN communication signal
between BCM and IPDM E/
R
2009 Pathfinder
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