2011 INFINITI QX56 turn signal

MWI-78
< SYMPTOM DIAGNOSIS >
THE OIL PRESSURE WARNING LAMP DOES NOT TURN ON
THE OIL PRESSURE WARNING LAMP DOES NOT TURN ON
DescriptionINFOID:0000000006221763
The oil pressure warning lamp stays off when the ignition switch is turned ON.
Diagnosis ProcedureINFOID:0000000006221764
1.CHECK OIL PRESSURE WARNING LAMP
Perform auto active test. Refer to PCS-10, "
Diagnosis Description".
Is oil pressure warning lamp blinking?
YES >> GO TO 2.
NO >> GO TO 4.
2.CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT
Check the oil pressure switch signal circuit. Refer to MWI-71, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK OIL PRESSURE SWITCH
Perform a unit check for the oil pressure switch. Refer to MWI-71, "
Component Inspection".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Replace oil pressure switch. Refer to EM-58, "
Removal and Installation".
4.CHECK COMBINATION METER INPUT SIGNAL
Connect CONSULT-III and perform an input signal check for the combination meter. Refer to MWI-71, "
Com-
ponent Function Check".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
Revision: 2010 May2011 QX56

MWI
THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFFMWI-79
< SYMPTOM DIAGNOSIS >
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THE OIL PRESSURE WARNING LAMP DOES NOT TURN OFF
DescriptionINFOID:0000000006221765
The oil pressure warning lamp remains illuminated while the engine is running (normal oil pressure).
Diagnosis ProcedureINFOID:0000000006221766
1.CHECK OIL PRESSURE WARNING LAMP
Perform auto active test. Refer to PCS-10, "
Diagnosis Description".
Is oil pressure warning lamp blinking?
YES >> GO TO 2.
NO >> GO TO 5.
2.CHECK IPDM E/R OUTPUT VOLTAGE
1. Turn ignition switch OFF.
2. Disconnect the oil pressure switch connector.
3. Turn ignition switch ON.
4. Check voltage between the oil pressure switch harness connector terminal and ground.
Is the inspection result normal?
YES >> GO TO 3.
NO >> GO TO 4.
3.CHECK OIL PRESSURE SWITCH
Perform a unit check for the oil pressure switch. Refer to MWI-71, "
Component Inspection".
Is the inspection result normal?
YES >> Replace IPDM E/R. Refer to PCS-32, "Removal and Installation".
NO >> Replace oil pressure switch. Refer to EM-58, "
Removal and Installation".
4.CHECK OIL PRESSURE SWITCH SIGNAL CIRCUIT
Check the oil pressure switch signal circuit. Refer to MWI-71, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 5.
NO >> Repair harness or connector.
5.CHECK COMBINATION METER INPUT SIGNAL
Connect CONSULT-III and perform an input signal check for the combination meter. Refer to MWI-71, "
Com-
ponent Function Check".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace IPDM E/R. Refer to PCS-32, "
Removal and Installation".
Te r m i n a l s
Voltag e
(Approx.)
(+) (
−)
Oil pressure switch Ground
Connector Terminal
E206 1 12 V
Revision: 2010 May2011 QX56

MWI-80
< SYMPTOM DIAGNOSIS >
THE PARKING BRAKE RELEASE WARNING CONTINUES DISPLAYING, OR
DOES NOT DISPLAY
THE PARKING BRAKE RELEASE WA RNING CONTINUES DISPLAYING,
OR DOES NOT DISPLAY
DescriptionINFOID:0000000006221767
 The parking brake warning is displayed during vehi cle travel even though the parking brake is released.
 The parking brake warning is not displayed even though driving the vehicle with the parking brake applied.
Diagnosis ProcedureINFOID:0000000006221768
1.CHECK PARKING BRAKE WARNING LAMP OPERATION
1. Start engine.
2. Check the operation of the brake warni ng lamp when operating the parking brake.
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> GO TO 2.
2.CHECK PARKING BRAKE SWITCH SIGNAL CIRCUIT
1. Turn ignition switch OFF.
2. Check the parking brake switch signal circuit. Refer to WCS-43, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> GO TO 3.
NO >> Repair harness or connector.
3.CHECK PARKING BRAKE SWITCH UNIT
Perform a unit check for the parking brake switch. Refer to BRC-118, "
Component Inspection".
Is the inspection result normal?
YES >> Replace combination meter. Refer to MWI-85, "Removal and Installation".
NO >> Replace parking brake switch. Refer to PB-5, "
Exploded View".
Condition Warning lamp status
Parking brake applied ON
Parking brake released OFF
Revision: 2010 May2011 QX56

PCS-6
< SYSTEM DESCRIPTION >[IPDM E/R]
SYSTEM
NOTE:
BCM controls the starter relay.
RELAY CONTROL SYSTEM : Fail-SafeINFOID:0000000006220163
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
If No CAN Communication Is Available With BCM
Control relay Input/output Transmi t unit Control part Reference page
 Headlamp low relay
 Headlamp high relay  Low beam request signal
 High beam request signal
BCM (CAN)
 Headlamp (LO)
 Headlamp (HI) EXL-10
Front fog lamp relay Front fog light request signal BCM (CAN) Front fog lamp
EXL-20
Tail lamp relay Position light request signal BCM (CAN) Parking lamp
 License plate
lamp
Tail lamp
 Side marker lamp EXL-18
Illuminations
INL-6
 Front wiper relay
 Front wiper high relayFront wiper request signal BCM (CAN)
Front wiper motorWW-7Front wiper stop position sig-
nal Front wiper motor
Rear window defogger
relay Rear window defogger control
signal
BCM (CAN)
Rear window defog-
ger
DEF-6
Horn relay
 Theft warning horn
relay  Theft warning horn request
signal
 Horn reminder signal BCM (CAN)
Horn (high)
Horn (low) SEC-17
 Starter relayNOTE
 Starter control relayStarter control rela
y signal BCM (CAN)
Starter motorSEC-10
,
SEC-10Steering lock unit condition
signal Steering lock unit
Starter relay control signal TCM
Steering lock relay Steering lock relay signal BCM (CAN)
Steering lock unitSEC-10
Steering lock unit condition
signal Steering lock unit
A/T shift selector (detention
switch) signal A/T shift selector
(detention switch)
A/C relay A/C compressor request sig-
nal ECM (CAN)
A/C compressor
(Magnet clutch) HAC-17
Headlamp washer relay
Headlamp washer request
signal BCM (CAN)Headlamp washer
pump WW-13
 Ignition relay
 Ignition relay-2
 Ignition relay-3Ignition switch ON signal BCM (CAN)
Each control unit,
sensor, actuator and
relay (ignition power
supply)PCS-29Vehicle speed signal
Combination meter
(CAN)
Push-button ignition switch
signal Push-button ignition
switch
Control part Fail-safe operation
Cooling fan  Transmits the pulse duty signal (PWM signal) 100% when the ignition switch is turned ON.
 Transmits the pulse duty signal (PWM signal) 0% when the ignition switch is turned OFF.
A/C compressor A/C relay OFF
Alternator Transmits the power generation command signal (PWM signal) 0%
Revision: 2010 May2011 QX56

PCS
SYSTEMPCS-7
< SYSTEM DESCRIPTION > [IPDM E/R]
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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 volt age 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 malfunc tion when the ignition switch is turned OFF.
FRONT WIPER PROTECTION FUNCTION
IPDM E/R detects front wiper stop position by a front wiper stop position signal.
When a front wiper stop position signal is in the conditi ons listed below, IPDM E/R stops power supply to wiper
after repeating a front wiper 10 seconds activation and 20 seconds stop.
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.
POWER CONTROL SYSTEM
Control part Fail-safe 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 lamp
 License plate lamp
 Illumination
 Tail lamp  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 motor  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 con- trol is activated while the front wiper is set in the INT mode and the front wiper motor is op-
erating.
 Return automatically wiper to stop position when ignition switch is turned ON if fail-safe con- trol is activated while front wiper motor is operated and wiper stops in the other position than
stop position.
Front fog lamp Front fog lamp relay OFF
Horn Horn OFF
Ignition relay The status just before activation of fail-safe is maintained.
Starter motor Starter control relay OFF
Steering lock unit Steering lock relay OFF
Voltage judgment IPDM E/R judgment Operation
Ignition relay contact side Ignition relay excitation coil
side
ON ON Ignition relay ON normal —
OFF OFF Ignition relay OFF normal —
ON OFF Ignition relay ON stuck  Detects DTC “B2098: IGN RELAY ON”
 Turns ON the tail lamp relay for 10 min-
utes
OFF ON Ignition relay OFF stuck Detects DTC “B2099: IGN RELAY OFF”
Ignition switch Front wiper switch Front wiper stop position signal
ON OFF
The front wiper stop position signal (stop position) cannot be input for
10 seconds.
ON The front wiper stop position signal does not change for 10 seconds.
Revision: 2010 May2011 QX56

PCS-18
< ECU DIAGNOSIS INFORMATION >[IPDM E/R]
IPDM E/R
17
(B) Ground Cooling fan motor
ground
Output Ignition switch ON 0 V
18
(B) Ground Ground — Ignition switch ON 0 V
19
(V) Ground Front fog lamp (RH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Front fog lamp switch
OFF
0 V
Front fog lamp switch ON Battery voltage
20
(W) Ground Front fog lamp (LH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Front fog lamp switch
OFF
0 V
Front fog lamp switch ON Battery voltage
21
(L) Ground
Headlamp washer re-
lay control Output
Ignition switch
ON Headlamp washer acti-
vated
0 V
Headlamp washer deacti-
vated 12 V
23
(GR/R) Ground Cranking request Output Select lever P or N (Ignition switch ON) 0 V
Select lever in any position other than P or
N (Ignition switch ON)
12 V
Engine running 12 V
24
(W/G) Ground Oil pressure switch Input Ignition switch
ONEngine stopped 0 V
Engine running 12 V
25
(L/Y) Ground Front wiper stop posi-
tion InputIgnition switch
ON Front wiper stop position 0 V
Any position other than
front wiper stop position
12 V
26
(P) Ground CAN-L Input/
Output ——
27
(L) Ground CAN-H
Input/
Output ——
30
(R/W) Ground Starter relay control Output  Ignition switch OFF or ACC
 At engine cranking
0 V
 Ignition switch ON
 Engine running 12 V
31
(B) Ground Injector relay control Output  Approximately 1 second after turning
the ignition switch ON
 Engine running 0 - 1.5 V
Approximately 1 second or more after turn-
ing the ignition switch ON Battery voltage
32
(LG) Ground Hood switch Input Close the hood 12 V
Open the hood 0 V
33
(R) Ground Alternator control Output Ignition switch OFF or ACC 0 V
Ignition switch ON 6 V
34
(P/B) Ground Horn relay control Output The horn is deactivated Battery voltage
The horn is activated 0 V
Te r m i n a l N O .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
Revision: 2010 May2011 QX56

PCS
IPDM E/RPCS-19
< ECU DIAGNOSIS INFORMATION > [IPDM E/R]
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(W) Ground ECM relay power sup-
ply OutputIgnition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) Battery voltage
36
(V) Ground ECM relay power sup-
ply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
37
(L) Ground Parking lamp (RH) Output Ignition switch
ONLighting switch OFF 0 V
Lighting switch 1ST Battery voltage
38
(Y) Ground Tail lamp (RH) Output Ignition switch
ONLighting switch OFF 0 V
Lighting switch 1ST Battery voltage
39
(L/B) Ground Front wiper HI Output Ignition switch
ONFront wiper switch OFF 0 V
Front wiper switch LO 9 V
Front wiper switch HI Battery voltage
41
(L/G) Ground ECM relay control Output Ignition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
Battery voltage
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) 0 - 1.5 V
42
(L) Ground Battery power supply Output Ignition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) Battery voltage
43
(LG) Ground Parking lamp (LH) Output
Ignition switch
ONLighting switch OFF 0 V
Lighting switch 1ST Battery voltage
44
(L/W) Ground Tail lamp (LH), license
plate lamp
OutputIgnition switch
ON Lighting switch OFF 0 V
Lighting switch 1ST Battery voltage
45
(Y/R) Ground Front wiper LO Output Ignition switch
ONFront wiper switch OFF 0 V
Front wiper switch LO Battery voltage
46
(L/W) Ground
Steering lock unit pow-
er supply OutputIgnition switch ACC or ON 0 V
Ignition switch
OFF
A few seconds after
opening the driver door
Battery voltage
Ignition switch
LOCK Press the push-button ig-
nition switch
Battery voltage
48
(BR) Ground P/N position Input Select lever in any position other than P or
N (Ignition switch ON)
0 V
Select lever P or N (Ignition switch ON) 12 V
49
(R) Ground Headlamp HI (RH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Lighting switch other than
HI and PASS
0 V
 Lighting switch HI
 Lighting switch PASS Battery voltage
Te r m i n a l N O .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
Revision: 2010 May2011 QX56

PCS-20
< ECU DIAGNOSIS INFORMATION >[IPDM E/R]
IPDM E/R
50
(LG/B) Ground Headlamp HI (LH) Output Lighting
switch 2ND or
AUTO (Light
is illuminated)Lighting switch other than
H and PASS
0 V
 Lighting switch HI
 Lighting switch PASS Battery voltage
51
(BR/Y) Ground Headlamp LO (LH) Output Lighting switch OFF 0 V
Lighting switch 2ND or AUTO (light is illu-
minated)
Battery voltage
52
(W) Ground Headlamp LO (RH) Output Lighting switch OFF 0 V
Lighting switch 2ND or AUTO (light is illu-
minated)
Battery voltage
54
(SB) Ground ECM power supply Output Approximately 1 second or more than after
turning the ignition switch ON
0 V
 Approximately 1 second after turning the ignition switch ON
 Engine running Battery voltage
55
(O) Ground Throttle control motor
relay power supply
OutputIgnition switch OFF
(More than a few seconds after turning ig-
nition switch OFF)
0 V
 Ignition switch ON
 Ignition switch OFF (For a few seconds after turning ignition
switch OFF) Battery voltage
56
(L) Ground A/C compressor power
supply OutputEngine run-
ning A/C switch OFF 0 V
A/C switch ON
(A/C compressor is oper-
ating)
Battery voltage
57
(V) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
58
(BR/R) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
59
(W/B) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
60
(V/R) Ground
Throttle control motor
relay control OutputIgnition switch ON
→ OFF 0 - 1.0 V
↓
Battery voltage
↓
0 V
Ignition switch ON 0 - 1.0 V
61
(W) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
62
(SB) Ground Ignition relay power
supply
OutputIgnition switch OFF or ACC 0 V
Ignition switch ON Battery voltage
63
(P) Ground Steering lock unit con-
dition-2
InputSteering lock is unlocked 0 V
Steering lock is locked 12 V
64
(G/Y) Ground A/T shift selector
(detention switch) InputIgnition switch
ON Select lever P 0 V
Select lever in any posi-
tion other than P
12 V
65
(L) Ground
Steering lock unit con-
dition-1 InputSteering lock is unlocked 12 V
Steering lock is locked 0 V
Te r m i n a l N O .
(Wire color) Description
Condition Va l u e
(Approx.)
Signal name Input/
Output
+–
Revision: 2010 May2011 QX56