brake sensor INFINITI QX56 2009 Factory Repair Manual
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![INFINITI QX56 2009 Factory Repair Manual
AUTOMATIC SPEED CONTROL DEVICE (ASCD)EC-33
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System DescriptionINFOID:0000000003771307
INPUT/OUTPUT](/img/42/57031/w960_57031-1359.png "INFINITI QX56 2009 Factory Repair Manual
AUTOMATIC SPEED CONTROL DEVICE (ASCD)EC-33
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System DescriptionINFOID:0000000003771307
INPUT/OUTPUT")
AUTOMATIC SPEED CONTROL DEVICE (ASCD)EC-33
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AUTOMATIC SPEED CONTROL DEVICE (ASCD)
System DescriptionINFOID:0000000003771307
INPUT/OUTPUT SIGNAL CHART
*: This signal is sent to the ECM through CAN communication line
BASIC ASCD SYSTEM
Refer to Owner's Manual for ASCD operating instructions.
Automatic Speed Control Device (ASCD) allows a dr
iver to keep vehicle at predetermined constant speed
without depressing accelerator pedal. Driver can set vehicle speed in advance between approximately 40 km/
h (25 MPH) and 144 km/h (89 MPH).
ECM controls throttle angle of electric thro ttle control actuator to regulate engine speed.
Operation status of ASCD is indicated by CRUISE i ndicator and SET indicator in combination meter. If any
malfunction occurs in ASCD system, it automatically deactivates control.
NOTE:
Always drive vehicle in safe manner according to traffic conditions and obey all traffic laws.
SET OPERATION
Press MAIN switch. (The CRUISE indicator in combination meter illuminates.)
When vehicle speed reaches a desired speed between approximately 40 km/h (25 MPH) and 144 km/h (89
MPH), press SET/COAST switch. (Then SET indi cator in combination meter illuminates.)
ACCELERATE OPERATION
If the RESUME/ACCELERATE switch is pressed during cruise control driving, increase the vehicle speed until
the switch is released or vehicle speed reac hes maximum speed controlled by the system.
And then ASCD will keep the new set speed.
CANCEL OPERATION
When any of following conditions exist, cruise operation will be canceled.
CANCEL switch is pressed
More than 2 switches at ASCD steering switch are pressed at the same time (Set speed will be cleared)
Brake pedal is depressed
Selector lever is changed to N, P, R position
Vehicle speed decreased to 13 km/h (8 MPH) lower than the set speed
VDC system is operated
When the ECM detects any of the following conditions, the ECM will cancel the cruise operation and inform
the driver by blinking indicator lamp.
Engine coolant temperature is slightly higher than t he normal operating temperature, CRUISE indicator may
blink slowly.
When the engine coolant temperature decreases to the normal operating temperature, CRUISE indicator will
stop blinking and the cruise operation will be able to work by pressing SET/COAST switch or RESUME/
ACCELERATE switch.
Malfunction for some self-diagnoses regarding ASCD control: SET indicator will blink quickly.
If MAIN switch is turned to OFF during ASCD is activated, all of ASCD operations will be canceled and vehicle
speed memory will be erased.
COAST OPERATION
When the SET/COAST switch is pressed during cruise control driving, decrease vehicle set speed until the
switch is released. And then ASCD will keep the new set speed.
RESUME OPERATION
Sensor Input signal to ECM ECM function Actuator
ASCD brake switch Brake pedal operation
ASCD vehicle speed controlElectric throttle control
actuator
Stop lamp switch Brake pedal operation
ASCD steering switch ASCD steering switch operation
Wheel sensor Vehicle speed*
TCM
Gear position
Powertrain revolution*
Revision: December 20092009 QX56
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![INFINITI QX56 2009 Factory Repair Manual
EC-64
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
ItemDIAGNOSTIC TEST MODE
WORK SUP-
PORT SELF-DIAGNOSTIC
RESULTS DATA
MONI-
TOR ACTIVE
TEST DTC & SRT
CONFIRMATION
DTC*1 FREEZ](/img/42/57031/w960_57031-1390.png "INFINITI QX56 2009 Factory Repair Manual
EC-64
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
ItemDIAGNOSTIC TEST MODE
WORK SUP-
PORT SELF-DIAGNOSTIC
RESULTS DATA
MONI-
TOR ACTIVE
TEST DTC & SRT
CONFIRMATION
DTC*1 FREEZ")
EC-64
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
ItemDIAGNOSTIC TEST MODE
WORK SUP-
PORT SELF-DIAGNOSTIC
RESULTS DATA
MONI-
TOR ACTIVE
TEST DTC & SRT
CONFIRMATION
DTC*1 FREEZE
FRAME
DATA*2 SRT
STATUS DTC
WORK
SUP-
PORT
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS) ×××
Camshaft position sensor (PHASE) ×××
Mass air flow sensor ××
Engine coolant temperature sensor ××××
Air fuel ratio (A/F) sensor 1 ××××
Heated oxygen sensor 2 ××××
Wheel sensor ×××
Accelerator pedal position sensor ××
Throttle position sensor ×××
Fuel tank temperature sensor ×××
EVAP control system pressure sen-
sor ××
Intake air temperature sensor ×××
Knock sensor ×
Refrigerant pressure sensor ×
Closed throttle position switch (ac-
celerator pedal position sensor sig-
nal) ×
Air conditioner switch ×
Transmission range signal ××
Stop lamp switch ××
Power steering pressure sensor ××
Battery voltage ×
Load signal ×
Intake valve timing control position
sensor ××
Fuel level sensor ××
Battery current sensor ××
ICC steering switch ××
ASCD steering switch ××
ICC brake switch ××
ASCD brake switch ××
Revision: December 20092009 QX56
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EC-68
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
TP SEN 1-B1 [V]
××
The throttle position sensor signal volt-
age is displayed. TP SEN 2-B1 signal is converted by
ECM inte](/img/42/57031/w960_57031-1394.png "INFINITI QX56 2009 Factory Repair Manual
EC-68
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
TP SEN 1-B1 [V]
××
The throttle position sensor signal volt-
age is displayed. TP SEN 2-B1 signal is converted by
ECM inte")
EC-68
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
TP SEN 1-B1 [V]
××
The throttle position sensor signal volt-
age is displayed. TP SEN 2-B1 signal is converted by
ECM internally. Thus, it differs from
ECM terminal voltage signal.
TP SEN 2-B1 [V]
××
FUEL T/TMP SE
[ ° C] or [ °F] The fuel temperature (determined by the
signal voltage of the fuel tank tempera-
ture sensor) is displayed.
INT/A TEMP SE
[ ° C] or [ °F] ×× The intake air temperature (determined
by the signal voltage of the intake air
temperature sensor) is indicated.
EVAP SYS PRES
[V] The signal voltage of EVAP control sys-
tem pressure sensor is displayed.
FUEL LEVEL SE [V] × The signal voltage of the fuel level sen-
sor is displayed.
START SIGNAL
[ON/OFF] Indicates start signal status [ON/OFF]
computed by the ECM according to the
signals of engine speed and battery volt-
age. After starting the engine, [OFF] is dis-
played regardless of the starter signal.
CLSD THL POS
[ON/OFF] ×× Indicates idle position [ON/OFF] comput-
ed by ECM according to the accelerator
pedal position sensor signal.
AIR COND SIG
[ON/OFF] ×× Indicates [ON/OFF] condition of the air
conditioner switch as determined by the
air conditioner signal.
P/N POSI SW
[ON/OFF] ××
Indicates [ON/OFF] condition from the
transmission range signal.
PW/ST SIGNAL
[ON/OFF] ×× [ON/OFF] condition of the power steering
system (determined by the signal voltage
of the power steering pressure sensor
signal) is indicated.
LOAD SIGNAL [ON/
OFF] ×× Indicates [ON/OFF] condition from the
electrical load signal.
ON: Rear window defogger switch is ON
and/or lighting switch is in 2nd position.
OFF: Both rear window defogger switch
and lighting switch are OFF.
IGNITION SW
[ON/OFF] ×× Indicates [ON/OFF] condition from igni-
tion switch signal.
HEATER FAN SW
[ON/OFF] ×
Indicates [ON/OFF] condition from heat-
er fan switch signal.
BRAKE SW
[ON/OFF] Indicates [ON/OFF] condition from the
stop lamp switch signal.
INJ PULSE-B1
[msec] Indicates the actual fuel injection pulse
width compensated by ECM according to
the input signals. When the engine is stopped, a certain
computed value is indicated.
INJ PULSE-B2
[msec]
IGN TIMING [BT-
DC] Indicates the ignition timing computed by
ECM according to the input signals. When the engine is stopped, a certain
value is indicated.
CAL/LD VALUE [%]
“Calculated load value” indicates the val- ue of the current air flow divided by peak
air flow.
MASS AIRFLOW
[g·m/s] Indicates the mass air flow computed by
ECM according to the signal voltage of
the mass air flow sensor.
Monitored item
[Unit] ECM IN-
PUT SIG-
NALS MAIN
SIGNALS Description Remarks
Revision: December 20092009 QX56
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EC-70
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST M](/img/42/57031/w960_57031-1396.png "INFINITI QX56 2009 Factory Repair Manual
EC-70
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST M")
EC-70
< FUNCTION DIAGNOSIS >[VK56DE]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
Test Item
A/F S1 HTR (B1)
[%] A/F sensor 1 heater control value com-
puted by ECM according to the input sig-
nals.
The current flow to the heater becomes larger as the value increases.
A/F S1 HTR (B2)
[%]
AC PRESS SEN [V]
The signal voltage from the refrigerant
pressure sensor is displayed.
VHCL SPEED SE
[km/h] or [mph] The vehicle speed computed from the
vehicle speed signal sent from combina-
tion meter is displayed.
SET VHCL SPD
[km/h] or [mph] The preset vehicle speed is displayed.
MAIN SW
[ON/OFF] Indicates [ON/OFF] condition from MAIN
switch signal.
CANCEL SW
[ON/OFF] Indicates [ON/OFF] condition from CAN-
CEL switch signal.
RESUME/ACC SW
[ON/OFF] Indicates [ON/OFF] condition from RE-
SUME/ACCELERATE switch signal.
SET SW
[ON/OFF] Indicates [ON/OFF] condition from SET/
COAST switch signal.
BRAKE SW1
[ON/OFF] Indicates [ON/OFF] condition from
ASCD brake switch signal.
BRAKE SW2
[ON/OFF] Indicates [ON/OFF] condition of stop
lamp switch signal.
DIST SW
[ON/OFF] Indicates [ON/OFF] condition from DIS-
TANCE switch signal.
ALT DUTY [%] Indicates the duty ratio of the power gen-
eration command value. The ratio is cal-
culated by ECM based on the battery
current sensor signal.
BAT CUR SEN [mV] The signal voltage of battery current sen-
sor is displayed.
ALT DUTY SIG
[ON/OFF] The control condition of the power gener-
ation voltage variable control (deter-
mined by ECM according to the input
signals) is indicated.
ON: Power generation voltage variable
control is active.
OFF: Power generation voltage variable
control is inactive.
A/F ADJ-B1 Indicates the correction factor stored in ECM. The factor is calculated from the
difference between the target air/fuel ra-
tio stored in ECM and the air-fuel ratio
calculated from air fuel ratio (A/F) sensor
1 signal.
A/F ADJ-B2 Monitored item
[Unit] ECM IN-
PUT SIG-
NALS MAIN
SIGNALS Description Remarks
Revision: December 20092009 QX56
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P0130, P0150 A/F SENSOR 1EC-137
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PROCEDURE FOR MALFUNCTION B
CAUTION:
Always drive vehicle at a safe speed.
With CONSULT-III
1. Start](/img/42/57031/w960_57031-1463.png "INFINITI QX56 2009 Factory Repair Manual
P0130, P0150 A/F SENSOR 1EC-137
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PROCEDURE FOR MALFUNCTION B
CAUTION:
Always drive vehicle at a safe speed.
With CONSULT-III
1. Start")
P0130, P0150 A/F SENSOR 1EC-137
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PROCEDURE FOR MALFUNCTION B
CAUTION:
Always drive vehicle at a safe speed.
With CONSULT-III
1. Start engine and warm it up to normal operating temperature.
2. Select “A/F SEN1 (B1)” or “A/F SEN1 (B2)
” in “DATA MONITOR” mode with CONSULT-III.
3. Check “A/F SEN1 (B1)” or “A/F SEN1 (B2)” indication.
If the indication is constantly approx . 2.2V and does not fluctuates, go to EC-137, "Diagnosis Procedure"
.
If the indication fluctuates around 2.2V, go to next step.
4. Select “A/F SEN1 (B1) P1276” (for DTC P0130) or “A/F SEN1 (B2) P1286” (for DTC P0150) of “A/F
SEN1” in “DTC WORK SUPPORT” mode with CONSULT-III.
5. Touch “START”.
6. When the following conditions are met, “TESTIN G” will be displayed on the CONSULT-III screen.
If “TESTING” is not displayed after 20 seconds, retry from step 2.
7. Release accelerator pedal fully. NOTE:
Never apply brake during releasing the accelerator pedal.
8. Make sure that “TESTING” changes to “COMPLETED”. If “TESTING” changed to “OUT OF CONDITION”, retry from step 6.
9. Make sure that “OK” is display ed after touching “SELF-DIAG RESULT”.
If “NG” is displayed, go to EC-137, "Diagnosis Procedure"
.
Overall Function CheckINFOID:0000000003771401
PROCEDURE FOR MALFUNCTION B
Use this procedure to check the overall function of the A/F sensor 1 circuit. During this check, a 1st trip DTC
might not be confirmed.
With GST
1. Start engine and warm it up to normal operating temperature.
2. Drive the vehicle at a speed of 80 km/h (50 MPH) for a few minutes in the suitable gear position.
3. Set shift lever to D position, then release the a ccelerator pedal fully until the vehicle speed decreases to
50 km/h (30 MPH).
NOTE:
Never apply brake during releasing the accelerator pedal.
4. Repeat steps 2 and 3 for five times.
5. Stop the vehicle and turn ignition switch OFF.
6. Wait at least 10 seconds and restart engine.
7. Repeat steps 2 and 3 for five times.
8. Stop the vehicle and connect GST to the vehicle.
9. Make sure that no 1st trip DTC is displayed.
If the 1st trip DTC is displayed, go to EC-137, "Diagnosis Procedure"
.
Diagnosis ProcedureINFOID:0000000003771402
1.CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten three ground screws on the body.
ENG SPEED 850 - 3,200 rpm
VHCL SPEED SE More than 64 km/h (40 MPH)
B/FUEL SCHDL 1.0 - 8.0 msec
Shift lever D position
Revision: December 20092009 QX56
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ECM
EC-421
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*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, the
y](/img/42/57031/w960_57031-1747.png "INFINITI QX56 2009 Factory Repair Manual
ECM
EC-421
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*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, the
y")
ECM
EC-421
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*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, the
y differ
from ECM terminals voltage signal.
*2: Before measuring the terminal voltage, confirm the battery is fully charged. Refer to PG-77
.
I/P PULLY SPD Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as the
tachometer indication
VEHICLE SPEED Turn drive wheels and compare CONSULT-IIl value with the speedometer
indication. Almost the same speed as the
speedometer indication
TRVL AFTER MIL Ignition switch: ON Vehicle has traveled after MIL has
turned ON.0 - 65,535 km
(0 - 40,7
23 mile)
A/F S1 HTR (B1)
A/F S1 HTR (B2) Engine: After warming up, idle the engine 4 - 100%
AC PRESS SEN Engine: Idle
Both A/C switch and blower fan switch: ON (Compressor operates.)
1.0 - 4.0V
VHCL SPEED SE Turn drive wheels and compare CONSULT-IIl value with the speedometer
indication. Almost the same speed as the
speedometer indication
SET VHCL SPD Engine: Running ASCD: Operating. The preset vehicle speed is dis-
played.
MAIN SW Ignition switch: ON MAIN switch: Pressed ON
MAIN switch: Released OFF
CANCEL SW Ignition switch: ON CANCEL switch: Pressed ON
CANCEL switch: Released OFF
RESUME/ACC SW Ignition switch: ON RESUME/ACCELERATE switch:
Pressed
ON
RESUME/ACCELERATE switch: Re-
leased OFF
SET SW Ignition switch: ON SET/COAST switch: Pressed ON
SET/COAST switch: Released OFF
DIST SW Ignition switch: ON DISTANCE switch: Pressed ON
DISTANCE switch: Released OFF
BRAKE SW1 Ignition switch: ON Brake pedal: Fully released ON
Brake pedal: Slightly depressed OFF
BRAKE SW2 Ignition switch: ON Brake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
CRUISE LAMP Ignition switch: ON MAIN switch: Pressed at the 1st time
→
at the 2nd time ON
→ OFF
SET LAMP MAIN switch: ON
Vehicle speed: Between 40 km/h
(25 MPH) and 144 km/h (89
MPH) ASCD: Operating ON
ASCD: Not operating OFF
ALT DUTY Engine: Idle 0 - 80%
BAT CUR SEN Engine speed: Idle
Battery: Fully charged*
2
Selector lever: P or N
Air conditioner switch: OFF
No load Approx. 2,600 - 3,500mV
ALT DUTY SIG Power generation voltage variable control: Operating ON
Power generation voltage variable control: Not operating OFF
MONITOR ITEM CONDITION SPECIFICATION
Revision: December 20092009 QX56
Page 1757 of 4171
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EC-430
< ECU DIAGNOSIS >[VK56DE]
ECM
99 G/RASCD steering switch
(Models with ASCD system) [Ignition switch: ON]
ASCD steering switch: OFF
Approximately 4V
[Ignition switch: ON]
MAIN switch: Press](/img/42/57031/w960_57031-1756.png "INFINITI QX56 2009 Factory Repair Manual
EC-430
< ECU DIAGNOSIS >[VK56DE]
ECM
99 G/RASCD steering switch
(Models with ASCD system) [Ignition switch: ON]
ASCD steering switch: OFF
Approximately 4V
[Ignition switch: ON]
MAIN switch: Press")
EC-430
< ECU DIAGNOSIS >[VK56DE]
ECM
99 G/RASCD steering switch
(Models with ASCD system) [Ignition switch: ON]
ASCD steering switch: OFF
Approximately 4V
[Ignition switch: ON]
MAIN switch: Pressed Approximately 0V
[Ignition switch: ON]
CANCEL switch: Pressed Approximately 1V
[Ignition switch: ON]
RESUME/ACCELERATE switch: Pressed Approximately 3V
[Ignition switch: ON]
SET/COAST switch: Pressed Approximately 2V
101 R/W Stop lamp switch [Ignition switch: OFF]
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
Brake pedal: Slightly depressed BATTERY VOLTAGE
(11 - 14V)
102 GR/R Transmission range signal [Ignition switch: ON]
Selector lever: P or N
Approximately 0V
[Ignition switch: ON]
Except the above gear position BATTERY VOLTAGE
(11 - 14V)
104 O Throttle cont rol motor relay[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON] 0 - 1.0V
106 BR/W Accelerator pedal position
sensor 1 [Ignition switch: ON]
Engine: Stopped
Accelerator pedal: Fully released
0.5 - 1.0V
[Ignition switch: ON]
Engine: Stopped
Accelerator pedal: Fully depressed 4.2 - 4.8V
107 V/R Fuel tank temperature sensor [Engine is running]Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.
108 BR/W ICC brake switch
(Models with ICC system)
ASCD brake switch
(Models with ASCD system) [Ignition switch: ON]
Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
Brake pedal: Fully released BATTERY VOLTAGE
(11 - 14V)
109 L/W Ignition switch [Ignition switch: OFF]
0V
[Ignition switch: ON] BATTERY VOLTAGE
(11 - 14V)
111 W / B ECM relay
(Self shut-off) [Engine is running]
[Ignition switch: OFF]
For a few seconds after turning ignition
switch OFF 0 - 1.5V
[Ignition switch: OFF]
More than a few seconds after turning igni- tion switch OFF BATTERY VOLTAGE
(11 - 14V)
113 GR Fuel pump relay [Ignition switch: ON]
For 1 second after turning ignition switch
ON
[Engine is running] 0 - 1.5V
[Ignition switch: ON]
More than 1 second after turning ignition switch ON BATTERY VOLTAGE
(11 - 14V)
TER-
MI-
NAL NO.
WIRE
COLOR ITEM CONDITION DATA (DC Voltage)
Revision: December 20092009 QX56
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EC-456
< ECU DIAGNOSIS >[VK56DE]
ECM
DTC Index
INFOID:0000000003771737
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
× :Applicable —: Not applicable
2 P0031 P0032 P0051 P0052 Air fuel ratio (A/F](/img/42/57031/w960_57031-1782.png "INFINITI QX56 2009 Factory Repair Manual
EC-456
< ECU DIAGNOSIS >[VK56DE]
ECM
DTC Index
INFOID:0000000003771737
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
× :Applicable —: Not applicable
2 P0031 P0032 P0051 P0052 Air fuel ratio (A/F")
EC-456
< ECU DIAGNOSIS >[VK56DE]
ECM
DTC Index
INFOID:0000000003771737
EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS
× :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 P0153 P2A00 P2A03 Air fuel ratio (A/F) sensor 1
P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
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 P0731 P0732 P0733 P0734 P0735 P0740 P0744 P0745 P1730 P1752 P1757 P1762 P1767
P1772 P1774 A/T related sensors, solenoid valves and switches
P1217 Engine over temperature (OVERHEAT)
P1140 P1145 Intake valve timing control position sensor
P1805 Brake switch
P2100 P2103 P2118 Electric throttle control actuator
P2101 Electric throttle control function
3 P0011 P0021 Intake valve timing control P0171 P0172 P0174 P0175 Fuel injection system function
P0300 - P0308 Misfire
P0420 P0430 Three way catalyst function
P0442 EVAP control system (SMALL LEAK)
P0455 EVAP control system (GROSS LEAK)
P0456 EVAP control sys tem (VERY SMALL LEAK)
P0506 P0507 Idle speed control system
P1148 P1168 Closed loop control
P1211 TCS control unit
P1212 TCS communication line
P1421 Cold start control
P1564 ICC/ASCD steering switch
P1568 ICC command value
P1572 ICC/ASCD brake switch
P1574 ICC/ASCD vehicle speed sensor
P2119 Electric throttle control actuator
Priority Detected items (DTC)
Items
(CONSULT-IIl screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-IIl
GST*
2ECM*3
CAN COMM CIRCUIT U1000 1000*5—1×EC-86
CAN COMM CIRCUIT U1001
1001*5—1 or 2*9
2*10—
EC-86
CONTROL UNIT(CAN) U1010 1010 — 1 ×EC-284
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED. P0000 0000
——
Flashing*7EC-55
INT/V TIM CONT-B1 P0011 0011 — 2 ×EC-40
INT/V TIM CONT-B2 P0021 0021 — 2 ×EC-40
A/F SEN1 HTR (B1) P0031 0031 — 2 ×EC-94
A/F SEN1 HTR (B1) P0032 0032 — 2 ×EC-94
HO2S2 HTR (B1) P0037 0037 — 2 ×EC-97
HO2S2 HTR (B1) P0038 0038 — 2 ×EC-97
A/F SEN1 HTR (B2) P0051 0051 — 2 ×EC-94
Revision: December 20092009 QX56
Page 1786 of 4171
![INFINITI QX56 2009 Factory Repair Manual
ECM
EC-459
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
OOUTPUT SPEED SENSOR*6P0720 0720 — 2
×TM-49
1GR INCORRECT RATIO P0731 0731 — 2 ×TM-54
2GR INCORRECT RATIO P0732 0732 — 2 ×](/img/42/57031/w960_57031-1785.png "INFINITI QX56 2009 Factory Repair Manual
ECM
EC-459
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
OOUTPUT SPEED SENSOR*6P0720 0720 — 2
×TM-49
1GR INCORRECT RATIO P0731 0731 — 2 ×TM-54
2GR INCORRECT RATIO P0732 0732 — 2 ×")
ECM
EC-459
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
OOUTPUT SPEED SENSOR*6P0720 0720 — 2
×TM-49
1GR INCORRECT RATIO P0731 0731 — 2 ×TM-54
2GR INCORRECT RATIO P0732 0732 — 2 ×TM-56
3GR INCORRECT RATIO P0733 0733 — 2 ×TM-58
4GR INCORRECT RATIO P0734 0734 — 2 ×TM-60
5GR INCORRECT RATIO P0735 0735 — 2 ×TM-62
TORQUE CONVERTER P0740 0740 — 2 ×TM-64
TORQUE CONVERTER P0744 0744 — 2 ×TM-66
PC SOLENOID A P0745 0745 — 2 ×TM-68
P-N POS SW/CIRCUIT P0850 0850 — 2 ×EC-288
INTK TIM S/CIRC-B1 P1140 1140 — 2 ×EC-291
INTK TIM S/CIRC-B2 P1145 1145 — 2 ×EC-291
CLOSED LOOP-B1 P1148 1148 — 1 ×EC-295
CLOSED LOOP-B2 P1168 1168 — 1 ×EC-295
TCS C/U FUNCTN P1211 1211 — 2 — EC-296
TCS/CIRC P1212 1212 — 2 —EC-297
ENG OVER TEMP P1217 1217 — 1×EC-36
CTP LEARNING-B1 P1225 1225 — 2 — EC-302
CTP LEARNING-B1 P1226 1226 — 2 —EC-304
COLD START CONTROL P1421 1421 — 2×EC-306
BAT CURRENT SENSOR P1550 1550 — 2 — EC-308
BAT CURRENT SENSOR P1551 1551 — 2 —EC-312
BAT CURRENT SENSOR P1552 1552 — 2 —EC-312
BAT CURRENT SENSOR P1553 1553 — 2 —EC-316
BAT CURRENT SENSOR P1554 1554 — 2 —EC-320
ASCD SW P1564 1564 — 1 —EC-324
(Models
with ICC) EC-328
(Models
with ASCD)
ICC COMMAND VALUE*
9P1568 1568 — 1 — EC-332
ASCD BRAKE SW P1572 1572 — 1 — EC-333
(Models
with ICC) EC-339
(Models
with ASCD)
ASCD VHL SPD SEN*
8P1574 1574 — 1 — EC-344
(Models
with ICC)
EC-346
(Models
with ASCD)
ID DISCARD IMM-ECM P1611 1611 — 2 — SEC-37
CHAIN OF ECM-IMMU P1612 1612 — 2 —SEC-33
CHAIN OF IMMU-KEY P1614 1614 — 2 —SEC-27
Items
(CONSULT-IIl screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-IIl
GST*
2ECM*3
Revision: December 20092009 QX56
Page 1787 of 4171
![INFINITI QX56 2009 Factory Repair Manual
EC-460
< ECU DIAGNOSIS >[VK56DE]
ECM
*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number i](/img/42/57031/w960_57031-1786.png "INFINITI QX56 2009 Factory Repair Manual
EC-460
< ECU DIAGNOSIS >[VK56DE]
ECM
*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number i")
EC-460
< ECU DIAGNOSIS >[VK56DE]
ECM
*1: 1st trip DTC No. is
the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: SRT code will not be set if the self-diagnostic result is NG.
*5: The troubleshooting for this DTC needs CONSULT-III.
*6: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.
*7: When the ECM is in the mode of displaying SRT status, MIL may flash. For the details, refer to "How to Display SRT Status".
*8: 2WD models
*9: Models with ICC
*10: Models without ICC
Emission-related Diagnostic InformationINFOID:0000000004114214
DTC AND 1ST TRIP DTC
The 1st trip DTC (whose number is the same as the DT C number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previous ly, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. The MIL will not
light up (two trip detection logic). If the same malfunc tion is not detected in the 2nd trip (meeting the required
driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the
2nd trip, both the 1st trip DTC and DTC are stored in t he ECM memory and the MIL lights up. In other words,
the DTC is stored in the ECM memory and the MIL light s up when the same malfunction occurs in two consec-
utive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be stored. Fo r malfunctions that blink or light up the MIL during the
1st trip, the DTC and 1st trip DTC are stored in the ECM memory.
DIFFERENCE OF KEY P1615 1615 — 2 — SEC-30
INTERLOCK P1730 1730 — 1×TM-76
INPUT CLUTCH SOL P1752 1752 — 1 ×TM-80
FR BRAKE SOLENOID P1757 1757 — 1 ×TM-82
DRCT CLUTCH SOL P1762 1762 — 1 ×TM-84
HLR CLUTCH SOLENOID P1767 1767 — 1 ×TM-86
L C BRAKE SOLENOID P1772 1772 — 1 ×TM-88
L C BRAKE SOLENOID P1774 1774 — 1 ×TM-90
BRAKE SW/CIRCUIT P1805 1805 — 2 — EC-348
ETC MOT PWR-B1 P2100 2100 — 1×EC-351
ETC FUNCTION/CIRC-B1 P2101 2101 — 1 ×EC-354
ETC MOT PWR P2103 2103 — 1 ×EC-351
ETC MOT-B1 P2118 2118 — 1 ×EC-358
ETC ACTR-B1 P2119 2119 — 1 ×EC-360
APP SEN 1/CIRC P2122 2122 — 1 ×EC-362
APP SEN 1/CIRC P2123 2123 — 1 ×EC-362
APP SEN 2/CIRC P2127 2127 — 1 ×EC-365
APP SEN 2/CIRC P2128 2128 — 1 ×EC-365
TP SENSOR-B1 P2135 2135 — 1 ×EC-369
APP SENSOR P2138 2138 — 1 ×EC-373
A/F SENSOR1 (B1) P2A00 2A00 — 2 ×EC-377
A/F SENSOR1 (B2) P2A03 2A03 — 2 ×EC-377
Items
(CONSULT-IIl screen terms) DTC*
1
SRT code Trip MIL
Reference
page
CONSULT-IIl
GST*
2ECM*3
Revision: December 20092009 QX56