NISSAN X-TRAIL 2003 Electronic Repair Manual

DTC P1706 PNP SWITCH
EC-327
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Wiring DiagramEBS00BCY
TBWA0072E

EC-328
[QR (WITH EURO-OBD)]
DTC P1706 PNP SWITCH
Diagnostic Procedure
EBS00BCZ
1.CHECK GROUND CIRCUIT
1. Turn ignition switch "OFF".
2. Disconnect PNP switch harness connector.
3. Check harness continuity between PNP switch terminal 2 and body ground.
Refer to Wiring Diagram.
4. Also check harness for short to power.
OK or NG
OK >> GO TO 2.
NG >> Repair open circuit or short to power in harness or connectors.
2.CHECK INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between ECM terminal 43 and PNP switch terminal 1.
Refer to Wiring Diagram.
3. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to power in harness or connectors.
3.CHECK PNP SWITCH
Refer toAT-135, "
PARK/NEUTRAL POSITION SWITCH"(A/T models) orMT-13, "PARK/NEUTRAL POSI-
TION SWITCH"(M/T models).
OK or NG
OK >> GO TO 4.
NG >> Replace PNP switch.
4.CHECK INTERMITTENT INCIDENT
Refer toEC-107, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END Continuity should exist.
Continuity should exist.

DTC P1805 BRAKE SWITCH
EC-329
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DTC P1805 BRAKE SWITCHPFP:25320
DescriptionEBS00BD0
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 ModeEBS00BD1
Specification data are reference values.
ECM Terminals and Reference ValueEBS00BD2
Specification data are reference values and are measured between each terminal and body 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 LogicEBS00BD3
DTC Confirmation ProcedureEBS00BD4
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.
4. Select "DATA MONITOR" mode with CONSULT-II.
5. If 1st trip DTC is detected, go toEC-331, "
Diagnostic Procedure"
.
WITH GST
Follow the procedure "WITH CONSULT-II" above.
MONITOR ITEM CONDITION SPECIFICATION
BRAKE SW
lIgnition 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[Engineisrunning]
lBrake pedal fully releasedApproximately 0V
[Engineisrunning]
lBrake pedal fully 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.
lHarness or connectors
(Stop lamp switch circuit is open or
shorted.)
lStop lamp switch
SEF058Y

EC-330
[QR (WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
Wiring Diagram
EBS00BD5
TBWA0089E

DTC P1805 BRAKE SWITCH
EC-331
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Diagnostic ProcedureEBS00BD6
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.
l15A fuse
lFuse block (J/B) connector M2
lHarness 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

EC-332
[QR (WITH EURO-OBD)]
DTC P1805 BRAKE SWITCH
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.
lHarness connectors M61, M41
lJoint connector-2 (LHD models)
lJoint connector-3 (RHD models)
lHarness 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 toEC-332, "
Component Inspection".
OK or NG
OK >> GO TO 7.
NG >> Replace stop lamp switch.
7.CHECK INTERMITTENT INCIDENT
Refer toEC-107, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT".
>>INSPECTION END
Component InspectionEBS00BD7
STOP LAMP SWITCH
1. Disconnect stop lamp switch harness connector.Continuity should exist.
PBIB0498E
PBIB0498E

DTC P1805 BRAKE SWITCH
EC-333
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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-334
[QR (WITH EURO-OBD)]
IGNITION SIGNAL
IGNITION SIGNAL
PFP:22448
Component DescriptionEBS00BD8
IGNITION COIL & POWER TRANSISTOR
The ignition signal from the ECM is sent to and amplified by the
power transistor. The power transistor turns on and off the ignition
coil primary circuit. This on-off operation induces the proper high
voltage in the coil secondary circuit.
ECM Terminals and Reference ValueEBS00BD9
Specification data are reference values and are measured between each terminal and body 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.
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
PBIB0509E
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
21
22
23
24BR
PU
L/R
GY/RIgnition signal No. 1
Ignition signal No. 2
Ignition signal No. 3
Ignition signal No. 4[Engine is running]
lWarm-up condition
lIdle speed0-0.1V
[Engine is running]
lWarm-up condition
lEngine speed is 2,000 rpm.0-0.2V
PBIB0521E
PBIB0522E

IGNITION SIGNAL
EC-335
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Wiring DiagramEBS00BDA
TBWA0083E

EC-336
[QR (WITH EURO-OBD)]
IGNITION SIGNAL
TBWA0084E