2009 INFINITI QX56 200

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
WW-61
< ECU DIAGNOSIS >
C
D E
F
G H
I
J
K
M A
B
WW
N
O P
Wiring DiagramINFOID:0000000004291612
ABMWA0008GB
Revision: December 20092009 QX56

WW-62
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
AAMWA0228GB
Revision: December 20092009 QX56

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
WW-63
< ECU DIAGNOSIS >
C
D E
F
G H
I
J
K
M A
B
WW
N
O P
ABMIA0017GB
Revision: December 20092009 QX56

WW-64
< ECU DIAGNOSIS >
IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
Fail Safe
INFOID:0000000004115482
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs fail-safe control. After CAN
communication recovers normally, it also returns to normal control.
If No CAN Communication Is Available With ECM
AAMIA0439GB
Revision: December 20092009 QX56

IPDM E/R (INTELLIGENT POWER DISTRIBUTION MODULE ENGINE ROOM)
WW-65
< ECU DIAGNOSIS >
C
D E
F
G H
I
J
K
M A
B
WW
N
O P
If No CAN Communication Is Available With BCM
IGNITION RELAY MALFUNCTION DETECTION FUNCTION
• IPDM E/R monitors the voltage at the contact circuit and excitation coil circuit of the ignition relay inside it.
• IPDM E/R judges the ignition relay error if the voltage differs between the contact circuit and the excitation
coil circuit.
• If the ignition relay cannot turn OFF due to contact seizure, it activates the tail lamp relay for 10 minutes to alert the user to the ignition relay malfunction when the ignition switch is turned OFF.
NOTE:
The tail lamp turns OFF when the ignition switch is turned ON.
FRONT WIPER CONTROL
IPDM E/R detects front wiper stop posit ion by a front wiper auto stop signal.
When a front wiper auto stop signal is in the conditions listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 second activation and 20 second stop five times.
NOTE:
This operation status can be confirmed on the IPDM E/R “DATA MONITOR” that displays “Block” for the item
“WIP PROT” while the wiper is stopped.
STARTER MOTOR PROTECTION FUNCTION
IPDM E/R turns OFF the starter control relay to protect the starter motor when the starter control relay remains
active for 90 seconds.
Control part Fail-safe in operation
Cooling fan • Turns ON the cooling fan relay when the ignition switch is turned ON
• Turns OFF the cooling fan relay when the ignition switch is turned OFF
Control part
Fail-safe in operation
Headlamp • Turns ON the headlamp low relay when the ignition switch is turned ON
• Turns OFF the headlamp low relay when the ignition switch is turned OFF
• Headlamp high relay OFF
•Parking lamps
• License plate lamps
• Tail lamps • Turns ON the tail lamp relay when the ignition switch is turned ON
• Turns OFF the tail lamp relay when the ignition switch is turned OFF
Front wiper • The status just before activation of fail-safe control is maintained until the ignition
switch is turned OFF while the front wiper is operating at LO or HI speed.
• The wiper is operated at LO speed until the ignition switch is turned OFF if the fail- safe control is activated while the front wipe r is set in the INT mode and the front wiper
motor is operating.
Rear window defogger Rear window defogger relay OFF
A/C compressor A/C relay OFF
Front fog lamps Front fog lamp relay OFF
Ignition switch Ignition relayTail lamp relay
ON ON —
OFF OFF —
Ignition switchFront wiper switch Auto stop signal
ON OFF
Front wiper stop position signal cannot be
input 10 seconds.
ON The signal does not change for 10 seconds.
Revision: December 20092009 QX56

WW-66
< SYMPTOM DIAGNOSIS >
WIPER AND WASHER SYSTEM SYMPTOMS
SYMPTOM DIAGNOSIS
WIPER AND WASHER SYSTEM SYMPTOMS
Symptom TableINFOID:0000000003776308
CAUTION:
Perform the self-diagnosis with CONSULT-III before performing the diagnosis by symptom. Perform
the diagnosis by DTC if DTC is detected.
Symptom Probable malfunction location Inspection item
Front wiper does not
operate. HI only
• Combination switch
• Harness between combination switch and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
• IPDM E/R
• Harness between IPDM E/R and front wiper motor
• Front wiper motor Front wiper moto
r (HI) circuit
Refer to WW-21, "
Compo-
nent Function Check".
Front wiper request signal
•BCM
• IPDM E/R IPDM E/R DATA MONITOR
"FR WIP REQ"
LO and INT • Combination switch
• Harness between combination switch and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
• IPDM E/R
• Harness between IPDM E/R and front wiper motor
• Front wiper motor Front wiper motor (LO) circuit
Refer to WW-19, "
Compo-
nent Function Check".
Front wiper request signal
•BCM
• IPDM E/R IPDM E/R DATA MONITOR
"FR WIP REQ"
INT only • Combination switch
• Harness between combination switch and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
Front wiper request signal
•BCM
• IPDM E/R IPDM E/R DATA MONITOR
"FR WIP REQ"
HI, LO, and INT SYMPTOM DIAGNOSIS
“FRONT WIPER DOES NOT OPERATE”
Refer to
WW-70, "
Diagnosis Procedure".
Revision: December 20092009 QX56

WIPER AND WASHER SYSTEM SYMPTOMSWW-67
< SYMPTOM DIAGNOSIS >
C
DE
F
G H
I
J
K
M A
B
WW
N
O P
Front wiper does not
stop. HI only
• Combination switch
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
Front wiper request signal
•BCM
• IPDM E/R IPDM E/R DATA MONITOR
"FR WIP REQ"
IPDM E/R —
LO only • Combination switch
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
Front wiper request signal
•BCM
• IPDM E/R IPDM E/R DATA MONITOR
"FR WIP REQ"
IPDM E/R —
INT only • Combination switch
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
Front wiper request signal
•BCM
• IPDM E/R IPDM E/R DATA MONITOR
"FR WIP REQ"
Front wiper does not
operate normally. Intermittent adjustment
cannot be performed.
• Combination switch
• Harness between combination switch and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
BCM —
Intermittent control
linked with vehicle
speed cannot be per-
formed. Check the vehicle speed detection wiper setting.
Refer to BCS-22, "
WIPER : CONSULT-III Function (BCM - WIPER)".
Wiper is not linked to
the washer operation. • Combination switch
• Harness between combination switch and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
BCM —
Does not return to stop
position (Repeatedly
operates for 10 sec-
onds and then stops
for 20 seconds. After
that, it stops the opera-
tion). • IPDM E/R
• Harness between IPDM E/R and front wiper
motor
• Front wiper motor Front wiper auto stop signal
circuit
Refer to WW-23, "
Compo-
nent Function Check".
Rear wiper does not
operate. ON only
• Combination switch
• Harness between combination switch and BCM
•BCM Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
INT only • Combination switch
• Harness between combination switch and BCM
•BCM Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
ON and INT • Combination switch
• Harness between combination switch and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
•BCM
• Harness between rear wiper motor and BCM
• Harness between rear wiper motor and ground
• Rear wiper motor
• Glass hatch ajar switch Combination switch
Refer to WW-28, "
Compo-
nent Function Check".
Symptom
Probable malfunction location Inspection item
Revision: December 20092009 QX56

WW-68
< SYMPTOM DIAGNOSIS >
WIPER AND WASHER SYSTEM SYMPTOMS
Rear wiper does not
stop.ON only
• Combination switch
•BCM Rear wiper motor circuit
Refer to WW-28, "
Compo-
nent Function Check".
INT only • Combination switch
•BCM Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
Rear wiper does not
operate normally. Wiper is not linked to
the washer operation.
• Combination switch
• Harness between rear wiper motor and BCM
•BCM
Combination switch
Refer to BCS-53, "
Symptom
Ta b l e".
BCM —
Rear wiper does not
return to the Stop posi-
tion (Stops after a five-
second operation). •BCM
• Harness between rear wiper motor and BCM
• Rear wiper motor Rear wiper auto stop signal
circuit
Refer to WW-30, "
Compo-
nent Function Check".
Rear wiper stops after
operating for five sec-
onds when ignition
switch is turned ON.
Symptom Probable malfunction location Inspection item
Revision: December 20092009 QX56