2011 INFINITI QX56 relay

EC-92
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
142
(R/W) 175
(B) Fuel pump control module
(FPCM) check
Input[When cranking engine] 0 V
[Engine is running]
 Warm-up condition
 Idle speed
9 V
143
(L/Y) 150
(R) EVAP control system pressure
sensor
Input [Ignition switch: ON] 1.8 - 4.8 V
144
(O/B) 150
(R) Refrigerant pressure sensor Input [Engine is running]
 Warm-up condition
 Both A/C switch and blower fan mo-
tor switch: ON (Compressor oper-
ates) 1.0 - 4.0 V
146 (L) — CAN communication line — — —
147
(G/Y) 175
(B) ASCD/ICC brake switch Input [Ignition switch: ON]
 Brake pedal: Slightly depressed
0 V
[Ignition switch: ON]
 Brake pedal: Fully released BATTERY VOLTAGE
(11 - 14 V)
150 (R) —Sensor ground
(Refrigerant pressure sensor/
Battery current sensor/EVAP
control system pressure sensor) —— —
151 (P) — CAN communication line — — —
156 (L) 175
(B) Power supply
for ECM (Back-
up) Input [Ignition switch: OFF] BATTERY VOLTAGE
(11 - 14 V)
158
(W/B) 175
(B) Stop lamp switch Input [Ignition switch: OFF]
 Brake pedal: Fully released
0 V
[Ignition switch: OFF]
 Brake pedal: Slightly depressed BATTERY VOLTAGE
(11 - 14 V)
161 (R/W) — ENG communication line — — —
163
(L/G) 175
(B) ECM relay (Self shut-off) Output [Engine is running]
[Ignition switch: OFF]
 A few seconds after turning ignition
switch OFF 0 - 1.5 V
[Ignition switch: OFF]
 More than a few seconds after turn- ing ignition switch OFF BATTERY VOLTAGE
(11 - 14 V)
165
(GR/ R) —
NOTE:
Not used —— —
166 (W) — ENG communication line — — —
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
Revision: 2010 May2011 QX56

EC-94
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
DTC No. Detected items Engine operating condition in fail-safe mode
U0113
U1003
U1024 Can communication circuit VVEL actuator
motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P0011
P0021 Intake valve timing control The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
P0087 FRP control system  Engine torque is limited.
 VVEL value is maintained at a fixed angle.
P0088 Engine speed is limited.
P008A Low fuel pressure control
system Engine torque is limited.
P0090 FRP control system  Engine torque is limited.
 VVEL value is maintained at a fixed angle.
P0102
P0103 Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118 Engine coolant tempera-
ture sensor circuit
Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT-III displays the engine coolant temperature decided by ECM.
Condition Engine coolant temperature decided
(CONSULT-III display)
Just as ignition switch is turned ON
or START 40
°C (104 °F)
Approx. 4 minutes or more after
engine starting 80
°C (176 °F)
Except as shown above 40 - 80 °C (104 - 176 °F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.
P0122
P0123
P0222
P0223
P2135 Throttle position sensor The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.
P0190 FRP sensor  Engine speed is limited.
 High pressure fuel pump is activated at maximum discharge pressure.
P0201
P0202
P0203
P0204
P0205
P0206
P0207
P0208 Injector  Engine torque is limited.
 Fuel injection shut-off of malfunction cylinder.
 Mixture ratio feedback control does not function.
 Idle engine speed is increased.
P0500 Vehicle speed sensor The cooling fan operates (Highest) while engine is running.
P0524 Engine oil pressure The signal is not energized to the intake valve timing control solenoid valve and the valve
control does not function.
Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0605 ECM (When ECM calculation function is malfunctioning:)
ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
ECM deactivates ASCD operation.
P0607 ECM VVEL actuator motor relay is
turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
Revision: 2010 May2011 QX56

ECM
EC-95
< ECU DIAGNOSIS INFORMATION > [VK56VD]
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P062B ECM Type1
 Engine torque is limited.
 Idle engine speed is increased.
 Fuel injector power supply shut-off.
 High fuel pressure limitation.
Typ e2
 Engine torque is limited.
 Fuel injection shut-off of malfunction cylinder.
 Mixture ratio feedback control does not function.
 Idle engine speed is increased.
P0643 Sensor power supply ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1087
P1088 VVEL control function VVEL of no
rmal bank is controlled at VVEL angle of abnormal bank.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P1089
P1092 VVEL control shaft position
sensor VVEL value is maintained at a fixed angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut
P1197 Out of gas  Engine torque is limited.
 VVEL value is maintained at a fixed angle.
P1608 VVEL control shaft position
sensor VVEL actuator motor relay is turned off, an
d VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P1090
P1093 VVEL actuator motor VVEL of no
rmal bank is controlled at VVEL angle of abnormal bank.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
VVEL actuator motor relay is turned off, an d VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P1091 VVEL actuator motor rela
y VVEL actuator motor relay is turned off, an d VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P1197 Out of gas  Engine torque is limited.
 VVEL value is maintained at a fixed angle.
P2101 Electric throttle control
function ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2118 Throttle control motor ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P2119 Electric throttle control ac-
tuator
(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator by regulating the throttle opening around the
idle position. The engine speed will not rise more than 2,000 rpm.
(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator because of regulating the throttle open-
ing to 20 degrees or less.
(When ECM detects the throttle valve is stuck open:)
While the vehicle is being driven, it slows down gradually by fuel cut. After the vehicle
stops, the engine stalls.
The engine can restart in the N or P position, and engine speed will not exceed 1,000 rpm
or more.
P1290
P2100
P2103 Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1606 VVEL control module VVEL
actuator motor relay is turned off, and VVEL value is become at a minimum angle.
Engine speed will not rise more than 3,500 rpm due to the fuel cut.
P1805 Brake switch ECM controls the electric throttle control
actuator by regulating the throttle opening to a
small range.
Therefore, acceleration will be poor.
Vehicle condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
DTC No. Detected items Engine operating condition in fail-safe mode
Revision: 2010 May2011 QX56

EC-98
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
NOTE:
*: If “P1197” is displayed with other DTC in priority 1, perform trouble diagnosis for “P1197” first.
DTC IndexINFOID:0000000006217733
×
:Applicable —: Not applicable
2  P0031 P0032 P0051 P0052 Air fuel ratio (A/F) sensor 1 heater
 P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
 P0075 P0081 Intake valve timing control solenoid valve
 P0130 P0131 P0132 P0133 P0150 P0151 P0152 P015 3 P2A00 P2A03 Air fuel ratio (A/F) sensor 1
 P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
 P0190 - P0193 FRP sensor
 P0441 EVAP control system purge flow monitoring
 P0443 P0444 P0445 EVAP canister purge volume control solenoid valve
 P0447 P0448 EVAP canister vent control valve
 P0451 P0452 P0453 EVAP control system pressure sensor
 P0550 Power steering pressure sensor
 P0603 ECM power supply
 P0710 P0717 P0720 P0729 P0730 P0731 P0732 P0733 P0734 P0735 P0740 P0744 P0745 P0750 P0775 P0780 P0795 P1730 P1734 P2713 P2722 P2731 P2807 A/T related sensors, solenoid valves and switches
 P1087 P1088 VVEL system
 P1090 P1093 VVEL actuator motor
 P1091 VVEL actuat or motor relay
 P1217 Engine over temperature (OVERHEAT)
 P1650 Starter motor relay 2
 P1651 Starter motor relay
 P2101 Electric throttle control function
 P2118 Throttle control motor
 P1805 Brake switch
 P2100 P2103 Throttle control motor relay
 P2101 Electric throttle control function
3  P0011 P0021 Intake valve timing control  P0087, P0088, P0090 FRP control system
 P008A Low fuel pressure control system
 P008B Low fuel pressure control system
 P0171 P0172 P0174 P0175 Fuel injection system function
 P0201 - P0208 Injector
 P0300 - P0308 Misfire
 P0420 P0430 Three way catalyst function
 P0456 EVAP control system (VERY SMALL LEAK)
 P0506 P0507 Idle speed control system
 P050E Cold start control
 P0524 Engine oil pressure
 P1148 P1168 Closed loop control
 P1212 TCS communication line
 P1421 Cold start control
 P1564 ASCD steering switch / ICC steering switch
 P1652 Starter motor system communication
 P2119 Electric throttle control actuator
 P1564 ASCD steering switch / ICC steering switch
 P1568 ICC command value
 P1572 ASCD brake switch / ICC brake switch
 P1574 ASCD vehicle speed sensor / ICC vehicle speed sensor
Priority Detected items (DTC)
DTC*1
Items
(CONSULT-III screen terms) SRT code Trip MIL
Reference
page
CONSULT-III
GST*
2ECM*3
U0101 0101 LOST COMM (TCM) — 1 ×EC-171
U0113 0113 CAN COMM CIRCUIT — 1 ×EC-173
U1001
1001*4CAN COMM CIRCUIT — 1 or 2 — EC-172
U1003 1003 CAN COMM CIRCUIT — 2 — EC-173
Revision: 2010 May2011 QX56

ECM
EC-103
< ECU DIAGNOSIS INFORMATION > [VK56VD]
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*1: 1st trip DTC No. is
the same as DTC No.
P1572 1572 ASCD BRAKE SW — 1 —
EC-438
(with ASCD)
EC-443
(with ICC)
P1574 1574 ASCD VHL SPD SEN — 1 — EC-447
(with ASCD)
EC-449
(with ICC)
P1606 1606 VVEL CONTROL MODULE — 1 or 2 × or — EC-451
P1607 1607 VVEL CONTROL MODULE — 1 ×EC-452
P1608 1608 VVEL SENSOR POWER/CIRC — 1 ×EC-453
P1610 1610 LOCK MODE — 2 — SEC-53
P1611 1611 ID DISCORD IMMU-ECM — 2 —SEC-54
P1612 1612 CHAIN OF ECM-IMMU — 2 — SEC-55
P1613 1613 ECM INT CIRC-IMMU — 2 —SEC-48
P1614 1614 CHAIN OF IMMU-KEY — 2 —SEC-56
P1615 1615 DIFFERENCE OF KEY — 2 —SEC-48
P1650 1650 STR MTR RELAY 2 — 2×SEC-48
P1651 1651 STR MTR RELAY — 2 ×SEC-48
P1652 1652 STR MTR SYS COMM — 1 ×SEC-48
P1730 1730 INTERLOCK — 2 ×TM-140
P1734 1734
7GR INCORRECT RATIO*7—2 ×TM-142
P1805 1805 BRAKE SW/CIRCUIT — 2 — EC-455
P2100 2100 ETC MOT PWR-B1 — 2×EC-458
P2101 2101 ETC FNCTN/CIRC-B1 — 1 ×EC-460
P2103 2103 ETC MOT PWR — 1 ×EC-458
P 2 11 8 2 11 8 E T C M O T- B 1 — 1 ×EC-464
P 2 11 9 2 11 9 E T C A C T R - B 1 — 1 ×EC-466
P2122 2122 APP SEN 1/CIRC — 1 ×EC-468
P2123 2123 APP SEN 1/CIRC — 1 ×EC-468
P2127 2127 APP SEN 2/CIRC — 1 ×EC-471
P2128 2128 APP SEN 2/CIRC — 1 ×EC-471
P2135 2135 TP SENSOR-B1 — 1 ×EC-475
P2138 2138 APP SENSOR — 1 ×EC-478
P2539 2539 LOW FUEL PRES SEN — 2 ×EC-483
P2541 2541 LOW FUEL PRES SEN — 2 ×EC-483
P2542 2542 LOW FUEL PRES SEN — 2 ×EC-483
P2713 2713 PRESS CONTROL SOL D — 2 ×TM-147
P2722 2722 PRESS CONTROL SOL E — 2 ×TM-148
P2731 2731 PRESS CONTROL SOL F — 2 ×TM-149
P2807 2807 PRESS CONTROL SOL G — 2 ×TM-150
P2A00 2A00 A/F SENSOR1 (B1) — 2 ×EC-487
P2A03 2A03 A/F SENSOR1 (B2) — 2 ×EC-487
DTC*1
Items
(CONSULT-III screen terms) SRT code Trip MIL Reference
page
CONSULT-III
GST*
2ECM*3
Revision: 2010 May2011 QX56

EC-112
< ECU DIAGNOSIS INFORMATION >[VK56VD]
VVEL CONTROL MODULE
15
(L/B) 14
(B) VVEL actuator motor
(Low lift) (bank 2)
Output[Engine is running]
 Warm-up condition
 Idle speed
0 - 14 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0 - 14 V
16
(L/R) 19
(L) VVEL control shaft position
sensor 2 (bank 1)
Input[Engine is running]
 Warm-up condition
 Idle speed
3.50 - 4.75 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0.25 - 4.75 V
17
(O) —Sensor ground
[VVEL control shaft position
sensor 2 (bank 2)] —— —
18
(W/L) 17
(O) VVEL control shaft position
sensor 2 (bank 2)
Input[Engine is running]
 Warm-up condition
 Idle speed
3.50 - 4.75 V
[Engine is running]
 Warm-up condition
 When revving engine up to 3,000 rpm quickly 0.25 - 4.75 V
19
(L) —Sensor ground
[VVEL control shaft position
sensor 2 (bank 1)]
—— —
20
(L/W) 19
(L) Sensor power supply
[VVEL control shaft position
sensor 2 (bank 1)]
— [Ignition switch: ON] 5 V
21
(BR/
W) 14
(B) VVEL actuator motor relay
abort signal
(ECM)
Input
[Engine is running]
 Warm-up condition
 Idle speed 0 V
22
(W) 17
(O) Sensor power supply
[VVEL control shaft position
sensor 2 (bank 2)]
— [Ignition switch: ON] 5 V
23
(BR/ Y) 14
(B) VVEL control motor relay Output [Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14 V)
[Ignition switch: ON] 0 - 1.0 V
24
(R/W) — ENG communication line
Input/
Output——
Terminal No. Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
JMBIA0854ZZ
JMBIA0855ZZ
Revision: 2010 May2011 QX56

EC-150
< BASIC INSPECTION >[VK56VD]
VVEL CONTROL SHAFT POSI
TION SENSOR ADJUSTMENT
VVEL CONTROL SHAFT POSITI ON SENSOR ADJUSTMENT
DescriptionINFOID:0000000006217752
VVEL control shaft position sensor adjustment is an operat ion to adjust the initial position of the VVEL control
shaft position sensor.
It must be performed each time VVEL ladder assembly is replaced.
CAUTION:
 It must be performed only on the replaced bank side.
 It must not be performed except when VVEL la dder assembly is replaced. If by any chance the
adjustment is performed, replace VVEL ladder assembly.
Work ProcedureINFOID:0000000006217753
1.START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES >> GO TO 2.
NO >> GO TO 3.
2.PERFORM VVEL CONTROL SHAFT POSITION SENSOR ADJUSTMENT
WITH CONSULT-III
1. Turn ignition switch ON.
2. Select “VVEL POS SEN ADJ PREP” in “WORK SUPPORT” mode with CONSULT-III.
3. Touch “Start” and wait a few seconds.
4. Check that “CMPLT” is displayed on CONSULT-III screen.
5. Select “VVEL POSITION SEN-B1” or “VVEL POSI TION SEN-B2” in “DATA MONITOR” mode with CON-
SULT-III.
6. Loosen the VVEL control shaft position sensor mounting bolts
(1).
7. Turn the VVEL control shaft position sensor (2) clockwise and counterclockwise while monitoring the output voltage of “VVEL
POSITION SEN-B1” or “VVEL POSITION SEN-B2” and adjust
the output voltage to be within the standard value.
8. Tighten the VVEL control shaft position sensor mounting bolts.
9. Reconfirm that the output voltage of “VVEL POSITI ON SEN-B1” or “VVEL POSITION SEN-B2” is within
the standard value.
NOTE:
If it varies from the standard value after the m ounting bolts are tightened, perform steps 6 to 8 again.
10. Turn ignition switch OFF and wait at least 10 seconds.
11. Start engine and warm it up to normal operating temperature.
12. Turn ignition switch OFF and wait at least 10 seconds.
13. Perform idle air volume learning. Refer to EC-148, "
Work Procedure".
>> INSPECTION END
3.PERFORM VVEL CONTROL SHAFT POSITION SENSOR ADJUSTMENT
WITHOUT CONSULT-III
1. Disconnect VVEL control shaft position sensor harness connector.
2. Remove VVEL actuator motor relay.
3. Turn ignition switch ON, wait at least 5 seconds and then turn it OFF. Voltage: 500
± 48 mV
: 7.0 Nm (0.71 kg-m, 62 in-lb)
Voltage: 500 ± 48 mV
JSBIA0533ZZ
Revision: 2010 May2011 QX56

VVEL CONTROL SHAFT POSITION SENSOR ADJUSTMENT
EC-151
< BASIC INSPECTION > [VK56VD]
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4. Reconnect all harness connectors disconnected.
5. Install VVEL actuator motor relay.
6. Turn ignition switch ON and wait at least 5 seconds.
7. Loosen the VVEL control shaft position sensor mounting bolts
(1).
8. Turn the VVEL control shaft position sensor (2) clockwise and
counterclockwise while monitoring the output voltage between
the VVEL control module terminals with a tester and adjust the
output voltage to be within the standard value.
9. Tighten the VVEL control shaft position sensor mounting bolts.
10. Reconfirm that the output voltage of VVEL contro l shaft position sensor is within the standard value.
NOTE:
If it varies from the standard value after the m ounting bolts are tightened, perform steps 7 to 9 again.
11. Turn ignition switch OFF and wait at least 10 seconds.
12. Start engine and warm it up to normal operating temperature.
13. Turn ignition switch OFF and wait at least 10 seconds.
14. Perform Idle Air Volume Learning. Refer to EC-148, "
Work Procedure".
>> INSPECTION END
JSBIA0533ZZ
VVEL control module Voltage
Bank Connector +–
Terminal Terminal
1 F56 36
500 ± 48 mV
254
: 7.0 Nm (0.71 kg-m, 62 in-lb)
VVEL control module
Voltage
Bank Connector +–
Terminal Terminal
1 F56 3 6
500 ± 48 mV
254
Revision: 2010 May2011 QX56