2001 NISSAN X-TRAIL turn signal

EC-1284
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DTC P1123 THROTTLE CONTROL MOTOR RELAY
Diagnostic Procedure
EBS00N7U
1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect throttle control motor relay harness connector.
3. Check voltage between throttle control motor relay terminals 2, 5
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.
2. DETECT MALFUNCTIONING PART
Check the following.
●15A fuse
●Harness for open or short between throttle control motor relay and battery
>> Repair or replace harness or connectors.
3. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect ECM harness connector.
2. Check continuity between ECM terminal 113 and throttle control motor relay terminal 3.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E60, F36
●Harness for open or short between ECM and throttle control motor relay
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0505E
Voltage: Battery voltage
PBIB0575E
Continuity should exist.

EC-1286
[QR20(WITHOUT EURO-OBD)]
DTC P1212 ESP/TCS/ABS COMMUNICATION LINE
DTC P1212 ESP/TCS/ABS COMMUNICATION LINE
PFP:47850
DescriptionEBS00N7W
NOTE:
If DTC P1212 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
EC-1199
.
This CAN communication line is used to control the smooth engine operation during ESP/TCS/ABS operation.
Pulse signals are exchanged between ECM and ESP/ABS/TCS control unit.
Be sure to erase the malfunction information such as DTC not only in ESP/TCS/ABS control unit but
also ECM after the ESP/TCS/ABS related repair.
On Board Diagnosis LogicEBS00N7X
The MI will not light up for this diagnosis.
Freeze frame data is not stored in the ECM for this self-diagnosis. The MI will not light up for this self-
diagnosis.
DTC Confirmation ProcedureEBS00N7Y
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10.5V at idle.
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for at least 10 seconds.
4. If a 1st trip DTC is detected, go to EC-1286, "
Diagnostic Proce-
dure" .
WITHOUT CONSULT-II
1. Start engine and let it idle for at least 10 seconds.
2. Turn ignition switch “OFF”, wait at least 10 seconds and then turn “ON”.
3. Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ECM.
4. If 1st trip DTC is detected, go to EC-1286, "
Diagnostic Procedure" .
Diagnostic ProcedureEBS00N7Z
1. CHECK ESP/TCS/ABS CONTROL UNIT FUNCTION
Refer to BRC-64, "
TROUBLE DIAGNOSIS" .
>>INSPECTION END
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1212
1212ESP/TCS/ABS commu-
nication lineECM can not receive the information from
ESP/TCS/ABS control unit continuously.
●Harness or connectors
(The CAN communication line between
ECM and ESP/TCS/ABS control unit is
open or shorted.)
●ESP/TCS/ABS control unit
●Dead (Weak) battery
SEF058Y

DTC P1805 BRAKE SWITCH
EC-1301
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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

HO2S1 HEATER
EC-1309
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Diagnostic ProcedureEBS00N8M
1.CHECK OVERALL FUNCTION CHECK
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch “OFF” and wait at least 10 seconds.
3. Turn ignition switch “ON”.
4. Set the tester probe between ECM terminals 2 (HO2S1 heater signal) and ground.
5. Start engine and let it idle.
6. Check the voltage under the following conditions.
Verify that the oscilloscope screen shows the signal wave as
shown below.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
OK or NG
OK >>INSPECTION END.
NG >> GO TO 2.
2.CHECK HO2S1 POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 1 harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between HO2S1 terminal 4 and ground with
CONSULT-II or tester.
OK or NG
OK >> GO TO 4.
NG >> GO TO 3.
Conditions Voltage
At idleApproximately 7.0V
Engine speed is above 3,600 rpmBATTERY VOLTAGE
(11 - 14V)
PBIB0673EPBIB0519E
PBIB0500E
Voltage: Battery voltage
PBIB0541E

EC-1310
[QR20(WITHOUT EURO-OBD)]
HO2S1 HEATER
3. DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors E60, F36
●Fuse block (J/B) connector E103
●10A fuse
●Harness for open or short between heated oxygen sensor 1 and fuse
>> Repair harness or connectors.
4. CHECK HO2S1 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 2 and HO2S1 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
5. CHECK HEATED OXYGEN SENSOR 1 HEATER
Refer to EC-1311, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 1.
6. CHECK INTERMITTENT INCIDENT
Refer to EC-1192, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END Continuity should exist.

EC-1314
[QR20(WITHOUT EURO-OBD)]
HO2S2 HEATER
Diagnostic Procedure
EBS00N8T
1. CHECK OVERALL FUNCTION CHECK
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set the voltmeter probe between ECM terminal 4 (HO2S2 heater signal) and ground.
4. Check the voltage under the following conditions.
OK or NG
OK >>INSPECTION END.
NG >> GO TO 2.
2. CHECK HO2S2 POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect heated oxygen sensor 2 harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between HO2S2 terminal 4 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.
●Harness connectors E60, F36
●Fuse block (J/B) connector E103
●10A fuse
●Harness for open or short between heated oxygen sensor 2 and fuse
>> Repair harness or connectors.
Conditions Voltage
At idle 0 - 1V
Engine speed is above
3,800 rpmBattery voltage
PBIB0672E
PBIB0500E
Voltage: Battery voltage
PBIB0541E

HO2S2 HEATER
EC-1315
[QR20(WITHOUT EURO-OBD)]
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4.CHECK HO2S2 OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminal 4 and HO2S2 terminal 1.
Refer to Wiring Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> Repair harness or connectors.
5.CHECK HEATED OXYGEN SENSOR 2 HEATER
Refer to EC-1315, "
Component Inspection" .
OK or NG
OK >> GO TO 6.
NG >> Replace heated oxygen sensor 2.
6.CHECK INTERMITTENT INCIDENT
Refer to EC-1192, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00N8U
HEATED OXYGEN SENSOR 2 HEATER
1. Check resistance between HO2S2 terminals as follows.
2. If NG, replace heated oxygen sensor 2.
CAUTION:
●Discard any heated oxygen sensor which has been dropped
from a height of more than 0.5 m (19.7 in) onto a hard sur-
face such as a concrete floor; use a new one.
●Before installing new oxygen sensor, clean exhaust system
threads using Oxygen Sensor Thread Cleaner tool J-43897-
18 or J-43897-12 and approved anti-seize lubricant.
Removal and InstallationEBS00N8V
HEATED OXYGEN SENSOR 2
Refer to EX-2, "EXHAUST SYSTEM" . Continuity should exist.
Terminal No. Resistance
1 and 4 2.3 - 4.3 Ω at 25°C (77°F)
2 and 1, 3, 4
∞Ω
(Continuity should not exist)
3 and 1, 2, 4
PBIB0542E

EC-1328
[QR20(WITHOUT EURO-OBD)]
HO2S2
Diagnostic Procedure
EBS00N9C
1. CHECK OVERALL FUNCTION-I
1. Start engine and drive the vehicle at over 70 km/h (43 MPH) for 2 consecutive minutes.
2. Stop vehicle and keep the engine running.
3. Set voltmeter probes between ECM terminal 95 (HO2S2 signal) and ground.
4. Check the voltage while revving up to 4,000 rpm under no load at least 10 times.
(Depress and release the accelerator pedal as quickly as possi-
ble.)
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
2. CHECK OVERALL FUNCTION-II
Keep engine at idle for 10 minutes, then check the voltage between
ECM terminal 95 and ground, or check voltage when coasting 80
km/h (50 MPH) in 3rd gear (M/T), “D” position with “OD” OFF (A/T).
OK or NG
OK >>INSPECTION END
NG >> GO TO 3.
3. RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 4. The voltage does not remain in the range of 0.2 to 0.4V
PBIB0675E
The voltage does not remain in the range of 0.2 to 0.4V
PBIB0675E
PBIB0494E