2011 INFINITI QX56 Eco

DIAGNOSIS SYSTEM (IPDM E/R)WW-21
< SYSTEM DESCRIPTION >
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ACTIVE TEST
Te s t i t e m
PUSH SW
[Off/On] Displays the status of the push-button ignition switch judged by IPDM E/R.
INTER/NP SW
[Off/On] Displays the status of the shift position judged by IPDM E/R.
ST RLY CONT
[Off/On] Displays the status of the starter relay status signal received from BCM via CAN
communication.
IHBT RLY -REQ
[Off/On] Displays the status of the starter control relay signal received from BCM via CAN
communication.
ST/INHI RLY
[Off/ ST ON/INHI ON/UNKWN] Displays the status of the starter relay and starter control relay judged by IPDM
E/R.
DETENT SW
[Off/On] Displays the status of the A/T shift selector (detention switch) judged by IPDM E/
R.
S/L RLY -REQ
[Off/On] Displays the status of the steering lock relay signal received from BCM via CAN
communication.
S/L STATE
[LOCK/UNLK/UNKWN] Displays the status of the steering lock judged by IPDM E/R.
OIL P SW
[Open/Close] Displays the status of the oil pressure switch judged by IPDM E/R.
HOOD SW
[Off/On] Displays the status of the hood switch judged by IPDM E/R.
HL WASHER REQ
[Off/On] Displays the status of the headlamp washer request signal received from BCM via
CAN communication.
THFT HRN REQ
[Off/On] Displays the status of the theft warning horn request signal received from BCM
via CAN communication.
HORN CHIRP
[Off/On] Displays the status of the horn reminder signal received from BCM via CAN com-
munication.
Monitor Item
[Unit] MAIN SIG-
NALS Description
Test item Operation Description
CORNERING LAMP LH
NOTE:
This item is indicated, but cannot be tested.
RH
HORN On Operates horn relay for 20 ms.
REAR DEFOGGER Off OFF
On Operates the rear window defogger relay.
FRONT WIPER Off OFF
Lo Operates the front wiper relay.
Hi Operates the front wiper relay and front wiper high relay.
MOTOR FAN* 1OFF
2 Transmits 50% pulse duty signal (PWM signal) to the cooling fan control module.
3 Transmits 75% pulse duty signal (PWM signal) to the cooling fan control module.
4
Transmits 100% pulse duty signal (PWM signal) to the cooling fan control mod-
ule.
HEAD LAMP WASHER On Operates the headlamp washer relay for 1 second.
Revision: 2010 May2011 QX56

WW-50
< SYMPTOM DIAGNOSIS >
WIPER AND WASHER SYSTEM SYMPTOMS
Front wiper does not
stopHI only
 Combination switch
BCM
Combination switch
Refer to
BCS-80, "
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-80, "
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 (AUTO) only  Combination switch
BCM
Combination switch
Refer to
BCS-80, "
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 Sensitivity adjustment
cannot be performed.
 Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
BCM —
Auto wiping operation
does not operate Check that the wiper setting is auto wiping operation
Refer to
WW-15, "
WIPER : CONSULT-III Function (BCM - WIPER)".
Intermittent control
linked with vehicle
speed cannot be per-
formed Check that the wiper setting is linked with vehicle speed
Refer to
WW-15, "
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-80, "
Symptom
Ta b l e"
BCM —
Does not return to stop
position. [Repeatedly
operates for 10 sec-
onds and then stops
for 20 seconds. (Fail-
safe)]  IPDM E/R
 Harness between IPDM E/R and front wiper
motor
 Front wiper motor Front wiper auto stop signal
circuit
Refer to
WW-38, "
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-80, "
Symptom
Ta b l e"
INT only  Combination switch
 Harness between combination switch and BCM
BCM Combination switch
Refer to
BCS-80, "Symptom
Ta b l e"
ON and INT  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
BCM
 Harness between rear wiper motor and BCM
 Harness between rear wiper motor and ground
 Rear wiper motor Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
Symptom Probable malfunction location Inspection item
Revision: 2010 May2011 QX56

WIPER AND WASHER SYSTEM SYMPTOMSWW-51
< SYMPTOM DIAGNOSIS >
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Rear wiper does not
stop ON only
 Combination switch
BCM Rear wiper motor circuit
Refer to
WW-43, "
Compo-
nent Function Check".
INT only  Combination switch
BCM Combination switch
Refer to
BCS-80, "
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-80, "
Symptom
Ta b l e"
BCM —
Rear wiper does not
return to the stop posi-
tion. [Stops after a five-
second operation.
(Fail-safe)] BCM
 Harness between rear wiper motor and BCM
 Rear wiper motor
Rear wiper auto stop signal
circuit
Refer to
WW-45, "
Compo-
nent Function Check"
Rear wiper does not
operate even when
shift lever is shifted to
the “R”. Check the linked with reverse rear wiper setting.
Refer to
WW-15, "WIPER : CONSULT-III Function (BCM - WIPER)".
NOTE:
Factory setting of the rear wiper operation is operation linked with reverse.
Shift position signal (CAN communication)
BCM
TCM TCM DATA MONITOR
″
SLCT LVR POSI ″
Headlamp washer
does not operate. Headlamp washer
does not operate with
the front washer when
headlamps are turned
ON.  Combination switch
 Harness between combination switch and BCM
BCM
Combination switch
Refer to
BCS-80, "
Symptom
Ta b l e"
 Fusible link
 Harness between fusible link and headlamp
washer relay
 Headlamp washer relay
 Harness between haedlamp washer relay and IPDM E/R
 IPDM E/R
 Harness between haedlamp washer relay and headlamp washer pump
 headlamp washer pump
 Harness between haedlamp washer pump and ground Headlamp washer circuit
Refer to
WW-47, "
Compo-
nent Function Check"
BCM —
Symptom Probable malfunction location Inspection item
Revision: 2010 May2011 QX56

WW-52
< SYMPTOM DIAGNOSIS >
NORMAL OPERATING CONDITION
NORMAL OPERATING CONDITION
DescriptionINFOID:0000000006300483
FRONT WIPER MOTOR PROTECTION FUNCTION
 IPDM E/R may stop the front wiper to protect the front wiper motor if any obstruction (operation resistance)
such as a large amount of snow is detected during the front wiper operation.
 At that time turn OFF the front wiper and remove t he foreign object. Then wait for approximately 20 seconds
or more and reactivate the front wiper. The wiper will operate normally.
REAR WIPER MOTOR PROTECTION FUNCTION
 BCM may stop rear wiper to protect the rear wiper motor when the rear wiper is stopped for 5 seconds or
more due to a snowfall.
 Rear wiper operates normally one minute after t he obstacles are removed with rear wiper OFF.
Revision: 2010 May2011 QX56