EC-576
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
DTC Inspection Priority ChartEBS010X5
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC U1000 and/or U1001 is displayed with other DTC, first perform the trouble diagnosis for DTC
U1000 and U1001. Refer to EC-633, "
DTC U1000, U1001 CAN COMMUNICATION LINE" .
*: For QR25DE engine modelsPriority Detected items (DTC)
1
U1000 U1001 CAN communication line
P0102 P0103 Mass air flow sensor
P0117 P0118 Engine coolant temperature sensor
P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
P0327 P0328 Knock sensor
P0335 Crankshaft position sensor (POS)
P0340 Camshaft position sensor (PHASE)
P0500 Vehicle speed sensor
P0605 ECM
P1229 Sensor power supply
P1610-P1615 NATS
P1706 Park/Neutral position (PNP) switch
P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2
P0132 P0134 Heated oxygen sensor 1
P0550 Power steering pressure sensor
P1065 ECM power supply
P1122 Electric throttle control function
P1124 P1126 Throttle control motor relay
P1128 Throttle control motor
P1211 TCS control unit
P1212 TCS communication line
P1720 Vehicle speed sensor
P1805 Brake switch
3
P0011 Intake valve timing control
P1121 Electric throttle control actuator
P1217 Engine over temperature (OVERHEAT)
P1564 ASCD steering switch*
P1572 ASCD brake switch*
P1574 ASCD vehicle speed sensor*
EC-580
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
6. PERFORM IDLE AIR VOLUME LEARNING
Refer to EC-560, "
Idle Air Volume Learning" .
Is Idle Air Volume Learning carried out successfully?
Ye s o r N o
Yes >> GO TO 7.
No >> 1. Follow the instruction of Idle Air Volume Learning.
2. GO TO 4.
7. CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Read idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
OK or NG
OK >> GO TO 10.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the Following.
Check camshaft position sensor (PHASE) and circuit. Refer to EC-701, "DTC P0340 CMP SENSOR
(PHASE)" .
Check crankshaft position sensor (POS) and circuit. Refer to EC-693, "DTC P0335 CKP SENSOR (POS)"
.
OK or NG
OK >> GO TO 9.
NG >> 1. Repair or replace.
2. GO TO 4.
9. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to BL-108,
"NATS (NISSAN ANTI-THEFT SYSTEM)" .
>> GO TO 4. QR20DE with M/T models
: 650 ± 50 rpm (in Neutral position)
Except above
: 700 ± 50 rpm [in P or N (A/T), Neutral (M/T) position]
QR20DE with M/T models
: 650 ± 50 rpm (in Neutral position)
Except above
: 700 ± 50 rpm [in P or N (A/T), Neutral (M/T) position]
SEF058Y
TROUBLE DIAGNOSIS
EC-583
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EC
17. DETECT MALFUNCTIONING PART
Check the following.
Check camshaft position sensor (PHASE) and circuit. Refer to EC-701, "DTC P0340 CMP SENSOR
(PHASE)" .
Check crankshaft position sensor (POS) and circuit. Refer to EC-693, "DTC P0335 CKP SENSOR (POS)"
.
OK or NG
OK >> GO TO 18.
NG >> 1. Repair or replace.
2. GO TO 4.
18. CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of an incident, but
this is a rare case.)
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to BL-108,
"NATS (NISSAN ANTI-THEFT SYSTEM)" .
>> GO TO 4.
EC-584
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
Symptom Matrix ChartEBS010X8
SYSTEM — BASIC ENGINE CONTROL SYSTEM
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit 11232 22 3 2EC-906
Fuel pressure regulator system334444444 4EC-562
Injector circuit 11232 22 2EC-891
Evaporative emission system 334444444 4EC-962
Air Positive crankcase ventilation sys-
tem334444444 41EC-967
Incorrect idle speed adjustment 33 1111 1EC-578
Electric throttle control actuator 112332222 2 2EC-723
,
EC-726
,
EC-737
,
EC-745
IgnitionIncorrect ignition timing adjustment33111 11 1EC-578
Ignition circuit 11222 22 2EC-873
Main power supply and ground circuit 22333 33 23EC-625
Mass air flow sensor circuit 11222 22 2EC-644
Engine coolant temperature sensor circuit 11222322312EC-652
Throttle position sensor circuit 12 22222 2EC-658
,
EC-680
,
EC-771
,
EC-773
,
EC-830
Accelerator pedal position sensor circuit3212 2EC-
372,EC-
815 , EC-
822 , EC-
838
Heated oxygen sensor 1 circuit 1232 22 2EC-666
,
EC-673
,
EC-861
Knock sensor circuit 2 2 3EC-688
Crankshaft position sensor (POS) circuit 2 2EC-693
Camshaft position sensor (PHASE) circuit 2 2EC-701
Vehicle speed signal circuit 2 3 3 3EC-709
Power steering pressure sensor circuit 2 3333EC-711
TROUBLE DIAGNOSIS
EC-597
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EC
13 L/WCamshaft position sensor
(PHASE)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idle1.0 - 4.0V
[Engine is running]
Engine speed is 2,000 rpm1.0 - 4.0V
14 PU/RCrankshaft position
sensor (POS)[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idleApproximately 3.0V
[Engine is running]
Engine speed is 2,000 rpmApproximately 3.0V
15 W Knock sensor[Engine is running]
Idle speedApproximately 2.5V
16 OR/B Heated oxygen sensor 2[Engine is running]
Warm-up condition
Revving engine from idle to 3,000 rpm
quickly after the following conditions are
met
–Keeping the engine speed between 3,500
and 4,000 rpm for 1 minute and at idle for
1 minute under no load0 - Approximately 1.0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0525E
PBIB0526E
PBIB0527E
PBIB0528E
EC-598
[QR (WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
19 PEVAP canister purge vol-
ume control solenoid valve[Engine is running]
Idle speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Engine speed is about 2,000 rpm (More
than 100 seconds after starting engine)Approximately 10V
22
23
41
42G/B
R/B
L/B
Y/BInjector No. 3
Injector No. 1
Injector No. 4
Injector No. 2[Engine is running]
Warm-up condition
Idle speed
NOTE:
The pulse cycle changes depending on
rpm at idleBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
Warm-up condition
Engine speed is 2,000 rpmBATTERY VOLTAGE
(11 - 14V)
24 G/WHeated oxygen sensor 1
heater[Engine is running]
Warm-up condition
Engine speed is below 3,600 rpmApproximately 7.0V
[Engine is running]
Engine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
29 BSensor ground
(Camshaft position sensor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
30 BSensor ground
(Crankshaft position sen-
sor)[Engine is running]
Warm-up condition
Idle speedApproximately 0V
34 Y/GIntake air temperature sen-
sor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with intake
air temperature. TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0050E
PBIB0520E
PBIB0529E
PBIB0530E
PBIB0519E
TROUBLE DIAGNOSIS
EC-605
[QR (WITHOUT EURO-OBD)]
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EC
ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION
X: Applicable
*1: This item includes 1st trip DTCs.ItemDIAGNOSTIC TEST MODE
WORK
SUPPORTSELF-DIAGNOSTIC
RESULTS
DATA
MONI-
TORDATA
MONITOR
(SPEC)ACTIVE
TEST DTC*
1FREEZE
FRAME
DATA*
2
ENGINE CONTROL COMPONENT PARTS
INPUT
Crankshaft position sensor (POS)××××
Camshaft position sensor (PHASE)×××
Mass air flow sensor×××
Engine coolant temperature sensor×××××
Heated oxygen sensor 1×××
Heated oxygen sensor 2××
Vehicle speed signal××××
Accelerator pedal position sensor×××
Throttle position sensor×××
Intake air temperature sensor××
Knock sensor×
Refrigerant pressure sensor××
Closed throttle position switch (accelerator
pedal position sensor signal)××
Air conditioner switch××
Park/neutral position (PNP) switch×××
Stop lamp switch×××
Power steering pressure sensor×××
Battery voltage××
Electrical load signal××
ASCD steering switch*
3×××
ASCD brake switch*
3×××
ASCD clutch switch*
3×××
ENGINE CONTROL COMPONENT PARTS
OUTPUT
Fuel injectors×××
Power transistor (Ignition timing)×××
Throttle control motor relay×××
Throttle control motor×
EVAP canister purge volume control sole-
noid valve×××
Air conditioner relay××
Fuel pump relay××××
Cooling fan relay××××
Heated oxygen sensor 1 heater××
Heated oxygen sensor 2 heater××
Intake valve timing control solenoid valve××××
VIAS control solenoid valve*
3×××
EC-608
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TROUBLE DIAGNOSIS
DATA MONITOR MODE
Monitored Item
×: Applicable
Monitored item [Unit]ECM
INPUT
SIGNALSMAIN
SIG-
NALSDescription Remarks
ENG SPEED [rpm]××
Indicates the engine speed computed from the
signals of the crankshaft position sensor
(POS) and camshaft position sensor (PHASE).
Accuracy becomes poor if engine
speed drops below the idle rpm.
If the signal is interrupted while the
engine is running, an abnormal
value may be indicated.
MAS A/F SE-B1 [V]××
The signal voltage of the mass air flow sensor
is displayed.When the engine is stopped, a
certain value is indicated.
B/FUEL SCHDL
[msec]×
“Base fuel schedule” indicates the fuel injec-
tion pulse width programmed into ECM, prior
to any learned on board correction.
A/F ALPHA-B1 [%]×
The mean value of the air-fuel ratio feedback
correction factor per cycle is indicated.
When the engine is stopped, a
certain value is indicated.
This data also includes the data
for the air-fuel ratio learning con-
trol.
COOLAN TEMP/S
[°C] or [°F]××
The engine coolant temperature (determined
by the signal voltage of the engine coolant
temperature sensor) is displayed.
When the engine coolant tempera-
ture sensor is open or short-cir-
cuited, ECM enters fail-safe mode.
The engine coolant temperature
determined by the ECM is dis-
played.
HO2S1 (B1) [V]××
The signal voltage of the heated oxygen sen-
sor 1 is displayed.
HO2S2 (B1) [V]×
The signal voltage of the heated oxygen sen-
sor 2 is displayed.
HO2S1 MNTR (B1)
[RICH/LEAN]××
Display of heated oxygen sensor 1 signal dur-
ing air-fuel ratio feedback control:
RICH: means the mixture became “rich”, and
control is being affected toward a leaner mix-
ture.
LEAN: means the mixture became “lean”, and
control is being affected toward a rich mixture.After turning ON the ignition
switch, “RICH” is displayed until
air-fuel mixture ratio feedback
control begins.
When the air-fuel ratio feedback is
clamped, the value just before the
clamping is displayed continu-
ously.
HO2S2 MNTR (B1)
[RICH/LEAN]×
Display of heated oxygen sensor 2 signal:
RICH: means the amount of oxygen after three
way catalyst is relatively small.
LEAN: means the amount of oxygen after
three way catalyst is relatively large.
When the engine is stopped, a
certain value is indicated.
VHCL SPEED SE
[km/h] or [mph]××
The vehicle speed computed from the vehicle
speed signal is displayed.
BATTERY VOLT [V]××
The power supply voltage of ECM is displayed.
ACCEL SEN 1 [V]××
The accelerator pedal position sensor signal
voltage is displayed.ACCEL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal. ACCEL SEN 2 [V]×
THRTL SEN 1 [V]××
The throttle position sensor signal voltage is
displayed.THRTL SEN 2 signal is converted
by ECM internally. Thus, it differs
from ECM terminal voltage signal. THRTL SEN 2 [V]×
INT/A TEMP SE
[°C] or [°F]××
The intake air temperature (determined by the
signal voltage of the intake air temperature
sensor) is indicated.