brake NISSAN X-TRAIL 2001 Service Workshop Manual

DTC P1805 BRAKE SWITCH
EC-1073
[QR20(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
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-1119
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
[QR20(WITHOUT EURO-OBD)]INDEX FOR DTCPFP:00024
Alphabetical IndexEBS00N36
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-1199
.
×: Applicable —: Not applicable
*1: 1st trip DTC No. is the same as DTC No.
*2: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*3: When engine is running.
*4: When the fail-safe operation occurs, the MI illuminates.
*5: The trouble shooting for this DTC needs CONSULT-II.
*6: Except for M/T models without ESP/TCS/ABS system.
*7: For M/T models with ESP/TCS/ABS system.Items
(CONSULT-II screen terms)DTC*
1
Trip MI lighting up Reference page
CONSULT-II
ECM*2
APP SEN/CIRCUIT P0121 0121 1×EC-1222
BRAKE SW/CIRCUIT P1805 1805 2 —EC-1301
CAN COMM CIRCUIT*6U1000
1000*51×EC-1199
CKP SEN/CIRCUIT P0335 0335 2×EC-1240
CMP SEN/CIRCUIT P0340 0340 2×EC-1246
ECM P0605 0605 1 or 2× or —EC-1262
ECM BACK UP/CIRC P1065 1065 2×EC-1269
ECT SEN/CIRCUIT*4P0117 0117 1×EC-1209
ECT SEN/CIRCUIT*4P0118 0118 1×EC-1209
ENG OVER TEMP P1217 1217 1×EC-1287
ETC ACTR P1121 1121 1 or 2×EC-1273
ETC FUNCTION/CIRC P1122 1122 1×EC-1275
ETC MOT RLY/CIRC P1123 1123 1 or 2× or —EC-1281
HO2S1 (B1) P0134 0134 2×EC-1229
KNOCK SEN/CIRC-B1 P0327 0327 2 —EC-1235
KNOCK SEN/CIRC-B1 P0328 0328 2 —EC-1235
MAF SEN/CIRCUIT*4 P0102 0102 1×EC-1202
MAF SEN/CIRCUIT*4 P0103 0103 1×EC-1202
MIL/CIRC P0650 0650 2 —EC-1265
NATS MALFUNCTIONP1610 -
P16151610 - 1615 2 —EC-1143
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.No DTC
Flashing*3—
Flashing*3EC-1144
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000———
PW ST P SEN/CIRC P0550 0550 2 —EC-1257
TCS/CIRC*7P1212 1212 2 —EC-1286
THRTL POS SEN/CIRC*4P0120 0120 1 or 2× or —EC-1214
VEH SPEED SEN/CIRC P0500 0500 2×EC-1252

EC-1120
[QR20(WITHOUT EURO-OBD)]
INDEX FOR DTC
DTC No. Index
EBS00N37
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-1199
.
×: Applicable —: Not applicable
*1: 1st trip DTC No. is the same as DTC No.
*2: In Diagnostic Test Mode II (Self-diagnostic results), these numbers are controlled by NISSAN.
*3: When engine is running.
*4: When the fail-safe operation occurs, the MI illuminates.
*5: The trouble shooting for this DTC needs CONSULT-II.
*6: Except for M/T models without ESP/TCS/ABS system.
*7: For M/T models with ESP/TCS/ABS system. DTC*
1Items
(CONSULT-II screen terms)Trip MI lighting up Reference page
CONSULT-II
ECM*
2
No DTC
Flashing*3NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.—
Flashing*3EC-1144
U1000
1000*5CAN COMM CIRCUIT*61×EC-1199
P0000 0000NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.———
P0102 0102
MAF SEN/CIRCUIT*
41×EC-1202
P0103 0103
MAF SEN/CIRCUIT*41×EC-1202
P 0 11 7 0 11 7
ECT SEN/CIRCUIT*41×EC-1209
P 0 11 8 0 11 8
ECT SEN/CIRCUIT*41×EC-1209
P0120 0120
THRTL POS SEN/CIRC*41 or 2× or —EC-1214
P0121 0121 APP SEN/CIRCUIT 1×EC-1222
P0134 0134 HO2S1 (B1) 2×EC-1229
P0327 0327 KNOCK SEN/CIRC-B1 2 —EC-1235
P0328 0328 KNOCK SEN/CIRC-B1 2 —EC-1235
P0335 0335 CKP SEN/CIRCUIT 2×EC-1240
P0340 0340 CMP SEN/CIRCUIT 2×EC-1246
P0500 0500 VEH SPEED SEN/CIRC 2×EC-1252
P0550 0550 PW ST P SEN/CIRC 2 —EC-1257
P0605 0605 ECM 1 or 2× or —EC-1262
P0650 0650 MIL/CIRC 2 —EC-1265
P1065 1065 ECM BACK UP/CIRC 2×EC-1269
P1121 1121 ETC ACTR 1 or 2×EC-1273
P1122 1122 ETC FUNCTION/CIRC 1×EC-1275
P1123 1123 ETC MOT RLY/CIRC 1 or 2× or —EC-1281
P1212 1212
TCS/CIRC*72—EC-1286
P1217 1217 ENG OVER TEMP 1×EC-1287
P1610 - P1615 1610 - 1615 NATS MALFUNCTION 2 —EC-1143
P1805 1805 BRAKE SW/CIRCUIT 2 —EC-1301

TROUBLE DIAGNOSIS
EC-1151
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Fail-safe ChartEBS00N3Y
The ECM enters fail-safe mode, if any of the following malfunctions is detected due to the open or short circuit.
When the ECM enters the fail-safe mode, the MI illuminates.
Priority Detected items (DTC)
1
●U1000 CAN communication line
●P0102 P0103 Mass air flow sensor
●P0117 P0118 Engine coolant temperature sensor
●P0120 Throttle position sensor
●P0121 Accelerator pedal position sensor
●P0327 P0328 Knock sensor
●P0335 Crankshaft position sensor (POS)
●P0340 Camshaft position sensor (PHASE)
●P0500 Vehicle speed sensor
●P0605 ECM
2
●P0134 Heated oxygen sensor 1
●P0550 Power steering pressure sensor
●P0650 MI
●P1065 ECM power supply
●P1122 Electric throttle control function
●P1123 Throttle control motor relay
●P1212 ESP/TCS/ABS communication line
●P1805 Brake switch
3
●P1121 Electric throttle control actuator
●P1217 Engine over temperature (OVERHEAT)
DTC No. Detected items Engine operating condition in fail-safe mode
P0102
P0103Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.
P0117
P0118Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time after turning
ignition switch “ON” or “START”.
CONSULT-II displays the engine coolant temperature decided by ECM.
ConditionEngine coolant temperature decided (CONSULT-
II display)
Just as ignition switch is turned
ON or Start40°C (104°F)
More than approx. 4 minutes after
ignition ON or Start80°C (176°F)
Except as shown above40 - 80°C (104 - 176°F)
(Depends on the time)
When the fail-safe system for engine coolant temperature sensor is activated, the cool-
ing fan operates while engine is running.
P0120 Throttle position sensor cir-
cuitECM controls the electric throttle control actuator by regulating the throttle opening to
small range.
Therefore, acceleration will be poor.
Condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration

EC-1168
[QR20(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
27 LG/BCooling fan relay
(High)[Engine is running]
●Cooling fan is not operating
●Cooling fan is operating at low speedBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating at high speed0 - 1.0V
29 B/P Fuel pump relay[Ignition switch “ON”]
●For 1 seconds after turning ignition switch “ON”
[Engine is running]0 - 1.0V
[Ignition switch “ON”]
●More than 1 seconds after turning ignition switch
“ON”.BATTERY VOLTAGE
(11 - 14V)
30 PU/WAir conditioner cut
signal[Engine is running]
●Both A/C switch and blower switch are “ON”
(Compressor operates).Approximately 0V
[Engine is running]
●A/C switch is “ON”
(Compressor not operates).Approximately 4.6V
33B/W
(With A/T)
W
(With M/T)CAN communication
line[Ignition switch “ON”]Approximately 2.6V
Output voltage varies with the
communication status.
34L/R
(With A/T)
R
(With M/T)CAN communication
line[Ignition switch “ON”]Approximately 2.4V
Output voltage varies with the
communication status.
36 L/OR Tachometer signal[Engine is running]
●Warm-up condition
●Idle speed6 - 7V
[Engine is running]
●Engine speed is 2,500 rpm6 - 7V
37 LGCooling fan relay
(Low)[Engine is running]
●Cooling fan is not operatingBATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●Cooling fan is operating0 - 1.0V
40 P Stop lamp switch[Engine is running]
●Brake pedal releasedApproximately 0V
[Engine is running]
●Brake pedal depressedBATTERY VOLTAGE
(11 - 14V)
41 B/Y Start signal[Ignition switch “ON”]Approximately 0V
[Ignition switch “START”]9 - 14V TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
PBIB0523E
PBIB0524E

EC-1178
[QR20(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
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.
B/FUEL SCHDL
[msec]×
●“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.
IGN TIMING
[BTDC]×
●Indicates the ignition timing computed
by ECM according to the input signals.●When the engine is stopped, a
certain value is indicated.
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.
CAL/LD VALUE [%]
●“Calculated load value” indicates the
value of the current airflow divided by
peak airflow.
MASS AIRFLOW
[g·m/s]
●Indicates the mass airflow computed by
ECM according to the signal voltage of
the mass air flow sensor.
PURG VOL C/V
[%]
●Indicates the EVAP canister purge vol-
ume control solenoid valve control value
computed by the ECM according to the
input signals.
●The opening becomes larger as the
value increases. Monitored item
[Unit]ECM
INPUT
SIG-
NALSMAIN
SIG-
NALSCAN
DIAG
SUP-
PORT
MNTRDescription Remarks

TROUBLE DIAGNOSIS
EC-1183
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
B/FUEL SCHDL
●Engine: After warming up
●Shift lever: N
●Air conditioner switch: OFF
●No-loadIdle 2.5 - 3.5 msec
2,000 rpm 2.5 - 3.5 msec
A/F ALPHA-B1
●Engine: After warming upMaintaining engine speed at 2,000
rpm54% - 155%
COOLAN TEMP/S
●Engine: After warming up More than 70°C (158°F)
HO2S1 (B1)
●Engine: After warming upMaintaining engine speed at 2,000
rpm0 - 0.3V ←→ Approx. 0.6 - 1.0V
HO2S2 (B1)
●Engine: After warming upRevving engine from idle up to 3,000
rpm quickly0 - 0.3V ←→ Approx. 0.6 - 1.0V
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 upRevving 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 - 0.71V
Accelerator pedal: Fully depressed More than 3.9V
ACCEL SEN2*
2●Ignition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.15 - 0.97V
Accelerator pedal: Fully depressed More than 3.8V
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: ONAccelerator 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 MONITOR ITEM CONDITION SPECIFICATION

DTC P1805 BRAKE SWITCH
EC-1301
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P1805 BRAKE SWITCHPFP:25320
DescriptionEBS00N89
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 ModeEBS00N8A
Specification data are reference values.
ECM Terminals and Reference ValueEBS00N8B
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 LogicEBS00N8C
The MI will not light up for this diagnosis.
FAIL-SAFE MODEEBS00N8D
When the malfunction is detected, the ECM enters in fail-safe mode.
DTC Confirmation ProcedureEBS00N8E
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.
Driving condition
When engine is idlingNormal
When acceleratingPoor acceleration

EC-1302
[QR20(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-1304, "
Diagnostic Proce-
dure" .
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-1143, "
How to Erase
DTC ( Without CONSULT-II)" .
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-1304, "
Diagnostic Procedure" .
SEF058Y

DTC P1805 BRAKE SWITCH
EC-1303
[QR20(WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00N8F
TBWA0089E