brake NISSAN X-TRAIL 2001 Service Owner's Manual

DTC P1805 BRAKE SWITCH
EC-349
[QR25(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
DTC P1805 BRAKE SWITCHPFP:25320
DescriptionEBS00M9U
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 ModeEBS00M9V
Specification data are reference values.
ECM Terminals and Reference ValueEBS00M9W
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 LogicEBS00M9X
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 ProcedureEBS00M9Y
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 idlingNormal
When acceleratingPoor acceleration

EC-350
[QR25(WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
4. Select “DATA MONITOR” mode with CONSULT-II.
5. If 1st trip DTC is detected, go to EC-352, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
SEF058Y

DTC P1805 BRAKE SWITCH
EC-351
[QR25(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
Wiring DiagramEBS00M9Z
TBWA0332E

EC-352
[QR25(WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
Diagnostic Procedure
EBS00MA0
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-353
[QR25(WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC
4.CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 40 and stop lamp switch terminal 2.
Refer to Wiring Diagram.
3. 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-353, "
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 InspectionEBS00MA1
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.Continuity should exist.
PBIB0498E

EC-354
[QR25(WITH 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

EC-432
[QR25(WITHOUT EURO-OBD)]
INDEX FOR DTC
[QR25(WITHOUT EURO-OBD)]INDEX FOR DTCPFP:00024
Alphabetical IndexEBS00NC2
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-513
.
×: Applicable –: Not applicable
Items
(CONSULT-II screen terms)DTC*
1
TripMI lighting
upReference page
CONSULT-II
ECM*2
APP SENSOR P2138 2138 2×EC-651
APP SEN 1/CIRC P2122 2122 1×EC-631
APP SEN 1/CIRC P2123 2123 1×EC-631
APP SEN 2/CIRC P2127 2127 1×EC-637
APP SEN 2/CIRC P2128 2128 1×EC-637
BRAKE SW/CIRCUIT P1805 1805 2 –EC-625
CAN COMM CIRCUIT*5U1000
1000*41×EC-513
CKP SEN/CIRCUIT P0335 0335 2×EC-551
CMP SEN/CIRCUIT P0340 0340 2×EC-557
CTP LEARNING P1225 1225 2 —EC-617
CTP LEARNING P1226 1226 2 —EC-619
ECM P0605 0605 1 or 2× or –EC-573
ECM BACK UP/CIRC P1065 1065 2×EC-580
ECT SEN/CIRCUIT P0117 0117 1×EC-523
ECT SEN/CIRCUIT P0118 0118 1×EC-523
ENG OVER TEMP P1217 1217 1×EC-603
ETC ACTR P1121 1121 1 or 2×EC-584
ETC FUNCTION/CIRC P1122 1122 1×EC-586
ETC MOT P1128 1128 1×EC-598
ETC MOT PWR P1124 1124 1×EC-593
ETC MOT PWR P1126 1126 1×EC-593
HO2S1 (B1) P0134 0134 2×EC-534
HO2S2 (B1) P0138 0138 2×EC-185
HO2S2 (B1) P0139 0139 2×EC-192
MAF SEN/CIRCUIT P0102 0102 1×EC-516
MAF SEN/CIRCUIT P0103 0103 1×EC-516
MIL/CIRC P0650 0650 1 or 2× or –EC-576
NATS MALFUNCTION P1610 - P1615 1610 - 1615 2 –EC-58
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.No DTC
Flashing*3–
Flashing*3EC-59
NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.P0000 0000––—
PW ST P SEN/CIRC P0550 0550 2 –EC-568
SENSOR POWER/CIRC P1229 1229 1×EC-621
TP SEN 2/CIRC P0122 0122 1×EC-528

EC-434
[QR25(WITHOUT EURO-OBD)]
INDEX FOR DTC
*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: The trouble shooting for this DTC needs CONSULT-II.
*5: For A/T models.
*6: When the fail-safe operations for both self-diagnoses occur at the same time, the MI illuminates. P1122 1122 ETC FUNCTION/CIRC 1×EC-586
P1124 1124 ETC MOT PWR 1×EC-593
P1126 1126 ETC MOT PWR 1×EC-593
P1128 1128 ETC MOT 1×EC-598
P1217 1217 ENG OVER TEMP 1×EC-603
P1225 1225 CTP LEARNING 2 –EC-617
P1226 1226 CTP LEARNING 2 –EC-619
P1229 1229 SENSOR POWER/CIRC 1×EC-621
P1610 - P1615 1610 - 1615 NATS MALFUNCTION 2 –EC-58
P1805 1805 BRAKE SW/CIRCUIT 2 –EC-625
P2122 2122 APP SEN 1/CIRC 1×EC-631
P2123 2123 APP SEN 1/CIRC 1×EC-631
P2127 2127 APP SEN 2/CIRC 1×EC-637
P2128 2128 APP SEN 2/CIRC 1×EC-637
P2135 2135 TP SENSOR 1×EC-644
P2138 2138 APP SENSOR 1×EC-651
DTC*1Items
(CONSULT-II screen terms)TripMI lighting
upReference page
CONSULT-II
ECM*
2

EC-464
[QR25(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
Fail-safe Chart
EBS00NEB
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
●P0122 P0123 P0222 P0223 P1225 P1226 P1229 P2135 Throttle position sensor
●P0327 P0328 Knock sensor
●P0335 Crankshaft position sensor (POS)
●P0340 Camshaft position sensor (PHASE)
●P0500 Vehicle speed sensor
●P0605 ECM
●P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor
2
●P0134 Heated oxygen sensor 1
●P0550 Power steering pressure sensor
●P0650 MI
●P1122 Electric throttle control function
●P1124 P1126 P1128 Electric throttle control actuator
●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
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.
P0122
P0123
P0222
P0223
P2135Throttle 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 nor-
mal condition.
So, the acceleration will be poor.
P1121 Electric throttle control actu-
ator
(ECM detect the throttle
valve is stuck open.)While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops,
the engine stalls.
The engine can restart in “N” or “P” position, and engine speed will not exceed 1,000
rpm or more.
P1122 Electric throttle control func-
tionECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1124
P1126Throttle control relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.
P1128 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.

EC-482
[QR25(WITHOUT EURO-OBD)]
TROUBLE DIAGNOSIS
37 L/YCooling 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
42 B/R Ignition switch[Ignition switch “OFF”]0V
[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
43 G/OR PNP switch[Ignition switch “ON”]
●Gear position is “P” or “N”.Approximately 0V
[Ignition switch “ON”]
●Except the above gear positionA/T model
BATTERY VOLTAGE
(11 - 14V)
M/T model
Approximately 5V
50 LG Data link connector[Ignition switch “ON”]
●CONSULT-II is disconnected.Approximately 5V
52 R/WElectrical load signal
(Rear window defog-
ger signal)[Ignition switch “ON”]
●Rear window defogger switch is “ON”BATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
●Rear window defogger switch is “OFF”Approximately 0V
53 R/YElectrical load signal
(Headlamp signal)[Ignition switch “ON”]
●Lighting switch is “2ND” positionBATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
●Lighting switch is “OFF”Approximately 0V
55 LG/BHeater fan switch sig-
nal[Ignition switch “ON”]
●Heater fan control switch is “ON”Approximately 0V
[Ignition switch “ON”]
●Heater fan control switch is “OFF”Approximately 5V
58 B Sensors' ground[Engine is running]
●Warm-up condition
●Idle speedApproximately 0V
59
60
106
108B/W
B/W
B/Y
B/YECM ground[Engine is running]
●Idle speedEngine ground TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)