brake NISSAN X-TRAIL 2001 Service Owner's Guide

TROUBLE DIAGNOSIS
EC-491
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HO2S2 MNTR (B1)
[RICH/LEAN]×
●Display of heated oxygen sensor 2 sig-
nal:
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 dis-
played.
ACCEL SEN 1 [V]××
●The accelerator pedal position sensor
signal voltage is displayed.
ACCEL SEN 2 [V]×
THRTL SEN 1 [V]××
●The throttle position sensor signal volt-
age is displayed.
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.
START SIGNAL
[ON/OFF]××
●Indicates [ON/OFF] condition from the
starter signal.●After starting the engine, [OFF] is
displayed regardless of the starter
signal.
CLSD THL POS
[ON/OFF]××
●Indicates idle position [ON/OFF] com-
puted by ECM according to the acceler-
ator 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
park/neutral position (PNP) switch sig-
nal.
PW/ST SIGNAL
[ON/OFF]××
●[ON/OFF] condition of the power steer-
ing 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 posi-
tion.
OFF ... Both rear window defogger
switch and lighting switch are OFF.
IGNITION SW
[ON/OFF]××
●Indicates [ON/OFF] condition from igni-
tion switch.
HEATER FAN SW
[ON/OFF]×
●Indicates [ON/OFF] condition from the
heater 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 indi-
cated. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks

TROUBLE DIAGNOSIS
EC-497
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HO2S1 MNTR (B1)●Engine: After warming upMaintaining engine speed at 2,000
rpmLEAN←→ RICH
Changes more than 5 times dur-
ing 10 seconds.
HO2S2 MNTR (B1)
●Engine: After warming up
●Keeping the engine speed at
between 3,500 to 4,000 rpm for
one minute and at idle for one
minute under no loadRevving engine from idle up to 3,000
rpm quicklyLEAN←→ RICH
VEH SPEED SE
●Turn drive wheels and compare CONSULT-II value with the speedometer
indication.Almost the same speed as the
speedometer indication.
BATTERY VOLT
●Ignition switch: ON (Engine stopped) 11 - 14V
ACCEL SEN1
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.41 - 0.72V
Accelerator pedal: Fully depressed 3.2 - 4.9V
ACCEL SEN2*
2●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released 0.15 - 0.98V
Accelerator pedal: Fully depressed 2.98 - 4.9V
THRTL SEN1
THRTL SEN2*
2
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released More than 0.36V
●Shift lever:
D (A/T model)
1st (M/T model)Accelerator pedal: Fully depressed Less than 4.75V
START SIGNAL
●Ignition switch: ON → START → ON OFF → ON → OFF
CLSD THL POS
●Ignition switch: ON
(Engine stopped)Accelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
AIR COND SIG
●Engine: After warming up, idle
the engineAir conditioner switch: OFF OFF
Air conditioner switch: ON
(Compressor operates.)ON
P/N POSI SW
●Ignition switch: ONShift lever:
P or N (A/T model)
Neutral (M/T model)ON
Shift lever: Except above OFF
PW/ST SIGNAL
●Engine: After warming up, idle
the engineSteering wheel is in neutral position.
(Forward direction)OFF
Steering wheel is turned. ON
LOAD SIGNAL
●Ignition switch: ONRear window defogger switch is ON
and/or lighting switch is in 2nd.ON
Rear window defogger switch is OFF
and lighting switch is OFF.OFF
IGNITION SW
●Ignition switch: ON → OFF → ON ON → OFF → ON
HEATER FAN SW
●Engine: After warming up, idle
the engineHeater fan is operating. ON
Heater fan is not operating OFF
BRAKE SW
●Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
INJ PULSE-B1
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 2.0 - 3.0 msec
2,000 rpm 1.9 - 2.9 msec
IGN TIMING
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdleMT: 12° - 16° BTDC
AT: 1 4° - 18° BTDC
2,000 rpm 25° - 45° BTDC MONITOR ITEM CONDITION SPECIFICATION

DTC P1805 BRAKE SWITCH
EC-625
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DTC P1805 BRAKE SWITCHPFP:25320
DescriptionEBS00NIZ
Brake switch signal is applied to the ECM through the stop lamp switch when the brake pedal is depressed.
This signal is used mainly to decrease the engine speed when the vehicle is driving.
CONSULT-II Reference Value in Data Monitor ModeEBS00NJ0
Specification data are reference values.
ECM Terminals and Reference ValueEBS00NJ1
Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECM's transistor. Use a ground other than ECM terminals, such as the ground.
On Board Diagnosis LogicEBS00NJ2
The MI will not light up for this diagnosis.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters in fail-safe mode.
DTC Confirmation ProcedureEBS00NJ3
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the DTC with CONSULT-II.
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW
●Ignition switch: ONBrake pedal: Fully released OFF
Brake pedal: Slightly depressed ON
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
40 P Stop lamp switch[Engine is running]
●Brake pedal releasedApproximately 0V
[Engine is running]
●Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1805
1805Brake switchA brake switch signal is not sent to ECM for an
extremely long time while the vehicle is driving.
●Harness or connectors
(Stop lamp switch circuit is open or
shorted.)
●Stop lamp switch
Engine operation condition in fail-fail safe mode
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

EC-626
[QR25(WITHOUT EURO-OBD)]
DTC P1805 BRAKE SWITCH
4. Select “DATA MONITOR” mode with CONSULT-II.
5. If 1st trip DTC is detected, go to EC-628, "
Diagnostic Procedure"
.
WITHOUT CONSULT-II
1. Turn ignition switch “ON”.
2. Fully depress the brake pedal for at least 5 seconds.
3. Erase the “Diagnostic Test Mode II (Self-diagnostic results)” memory. Refer to EC-459, "
How to Erase
Diagnostic Test Mode II (Self-diagnostic Results)" .
4. Turn ignition switch “OFF”, wait at least 10 seconds and then turn “ON”.
5. Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ECM.
6. If 1st trip DTC is detected, go to EC-628, "
Diagnostic Procedure" .
SEF058Y

DTC P1805 BRAKE SWITCH
EC-627
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Wiring DiagramEBS00NJ4
TBWA0332E

EC-628
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DTC P1805 BRAKE SWITCH
Diagnostic Procedure
EBS00NJ5
1. CHECK STOP LAMP SWITCH CIRCUIT
1. Turn ignition switch “OFF”.
2. Check the stop lamp when depressing and releasing the brake pedal.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.
2. Check voltage between stop lamp switch terminal 1 and ground
with CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
3. DETECT MALFUNCTIONING PART
Check the following.
●15A fuse
●Fuse block (J/B) connector M2
●Harness for open and short between stop lamp switch and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
Brake pedal Stop lamp
Fully released Not illuminated
Depressed Illuminated
PBIB0498E
Voltage: Battery voltage
PBIB0117E

DTC P1805 BRAKE SWITCH
EC-629
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4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Disconnect stop lamp switch harness connector.
4. Check harness continuity between ECM terminal 40 and stop
lamp switch terminal 2.
Refer to Wiring Diagram.
5. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 6.
NG >> GO TO 5.
5.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors M61, M41
●Joint connector-2 (LHD models)
●Joint connector-3 (RHD models)
●Harness for open or short between ECM and stop lamp switch
>> Repair open circuit or short to ground or short to power in harness or connectors.
6.CHECK STOP LAMP SWITCH
Refer to EC-629, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> Replace stop lamp switch.
7.CHECK INTERMITTENT INCIDENT
Refer to EC-115, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00NJ6
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.Continuity should exist.
PBIB0498E
PBIB0498E

EC-630
[QR25(WITHOUT EURO-OBD)]
DTC P1805 BRAKE SWITCH
2. Check continuity between stop lamp switch terminals 1 and 2
under the following conditions.
3. If NG, replace stop lamp switch.
Conditions Continuity
Brake pedal fully released Should not exist.
Brake pedal depressed Should exist.
PBIB0118E

INDEX FOR DTC
EC-753
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[QR20(WITH EURO-OBD)]INDEX FOR DTCPFP:00024
Alphabetical IndexEBS00MS0
Check if the vehicle is a model with Euro-OBD (E-OBD) system or not by the “Type approval number” on the
identification plate. Refer to GI-43, "
IDENTIFICATION PLATE" .
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
EC-854
.
×: Applicable –: Not applicable
Items
(CONSULT-II screen terms)DTC*
1
TripMI lighting
upReference page
CONSULT-II
GST*
2ECM*3
APP SEN/CIRCUIT P0121 0121 1×EC-893
A/T 1ST GR FNCTN P0731 0731 2×AT-131
A/T 2ND GR FNCTN P0732 0732 2×AT-137
A/T 3RD GR FNCTN P0733 0733 2×AT-143
A/T 4TH GR FNCTN P0734 0734 2×AT-149
ATF TEMP SEN/CIRC P0710 0710 2×AT- 11 6
BRAKE SW/CIRCUIT P1805 1805 2 –EC-1068
CAN COMM CIRCUIT*7U1000
1000*61×EC-854
CKP SEN/CIRCUIT P0335 0335 2×EC-956
CMP SEN/CIRCUIT P0340 0340 2×EC-962
CYL 1 MISFIRE P0301 0301 2×EC-946
CYL 2 MISFIRE P0302 0302 2×EC-946
CYL 3 MISFIRE P0303 0303 2×EC-946
CYL 4 MISFIRE P0304 0304 2×EC-946
ECM P0605 0605 1 or 2× or –EC-988
ECM BACK UP/CIRC P1065 1065 2×EC-995
ECT SEN/CIRCUIT P0117 0117 1×EC-881
ECT SEN/CIRCUIT P0118 0118 1×EC-881
ENG OVER TEMP P1217 1217 1×EC-1050
ENGINE SPEED SIG P0725 0725 2×AT-127
ETC ACTR P1121 1121 1 or 2×EC-1010
ETC FUNCTION/CIRC P1122 1122 1×EC-1012
ETC MOT RLY/CIRC P1123 1123 1 or 2× or –EC-1018
FUEL SYS-LEAN-B1 P0171 0171 2×EC-934
FUEL SYS-RICH-B1 P0172 0172 2×EC-940
HO2S1 (B1) P0132 0132 2×EC-899
HO2S1 (B1) P0133 0133 2×EC-905
HO2S1 (B1) P0134 0134 2×EC-914
HO2S1 (B1) P1143 1143 2×EC-1023
HO2S1 (B1) P1144 1144 2×EC-1029
HO2S1 HTR (B1) P0031 0031 2×EC-860
HO2S1 HTR (B1) P0032 0032 2×EC-860
HO2S2 (B1) P0138 0138 2×EC-921
HO2S2 (B1) P0139 0139 2×EC-927
HO2S2 (B1) P1146 1146 2×EC-1035

EC-756
[QR20(WITH EURO-OBD)]
INDEX FOR DTC
*1: 1st trip DTC No. is the same as DTC No.
*2: These numbers are prescribed by ISO 15031-5.
*3: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*4: When engine is running.
*5: When the fail-safe operations for both self-diagnoses occur at the same time, the MI illuminates.
*6: The trouble shooting for this DTC needs CONSULT-II.
*7: Except for M/T models without ESP/TCS/ABS system.
*8: For M/T models with ESP/TCS/ABS system. P0445 0445 PURG VOLUME CONT/V 2×EC-972
P0500 0500
VEH SPEED SEN/CIRC*52×EC-978
P0550 0550 PW ST P SEN/CIRC 2 –EC-983
P0605 0605 ECM 1 or 2× or –EC-988
P0650 0650 MIL/CIRC 2 –EC-991
P0705 0705 PNP SW/CIRC 2×AT- 11 0
P0710 0710 ATF TEMP SEN/CIRC 2×AT- 11 6
P0720 0720
VEH SPD SEN/CIR AT*52×AT-122
P0725 0725 ENGINE SPEED SIG 2×AT-127
P0731 0731 A/T 1ST GR FNCTN 2×AT-131
P0732 0732 A/T 2ND GR FNCTN 2×AT-137
P0733 0733 A/T 3RD GR FNCTN 2×AT-143
P0734 0734 A/T 4TH GR FNCTN 2×AT-149
P0740 0740 TCC SOLENOID/CIRC 2×AT-158
P0745 0745 L/PRESS SOL/CIRC 2×AT-163
P0750 0750 SFT SOL A/CIRC 1×AT-170
P0755 0755 SFT SOL B/CIRC 1×AT-175
P1065 1065 ECM BACK UP/CIRC 2×EC-995
P1102 1102 MAF SENSOR 1×EC-999
P 1111 1111 I N T / V T I M V / C I R - B 1 2×EC-1005
P1121 1121 ETC ACTR 1 or 2×EC-1010
P1122 1122 ETC FUNCTION/CIRC 1×EC-1012
P1123 1123 ETC MOT RLY/CIRC 1 or 2× or –EC-1018
P1143 1143 HO2S1 (B1) 2×EC-1023
P1144 1144 HO2S1 (B1) 2×EC-1029
P1146 1146 HO2S2 (B1) 2×EC-1035
P1147 1147 HO2S2 (B1) 2×EC-1042
P1212 1212 TCS/CIRC*8 2 –EC-1049
P1217 1217 ENG OVER TEMP 1×EC-1050
P1610 - P1615 1610 - 1615 NATS MALFUNCTION 2 –EC-790
P1705 1705 TP SEN/CIRC A/T 1×AT-180
P1706 1706 P-N POS SW/CIRCUIT 2×EC-1064
P1760 1760 O/R CLTCH SOL/CIRC 2×AT-185
P1805 1805 BRAKE SW/CIRCUIT 2 –EC-1068
DTC*1
Items
(CONSULT-II screen terms)TripMI lighting
upReference page
CONSULT-II
GST*
2ECM*3