NISSAN X-TRAIL 2001 Service Repair Manual

DTC P1510 ACCELERATOR PEDAL RELEASED POSITION SWITCH
EC-1531
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DTC P1510 ACCELERATOR PEDAL RELEASED POSITION SWITCHPFP:18002
DescriptionEBS0096V
The accelerator work unit is installed on the upper end of the accelerator pedal assembly. The accelerator
pedal position sensor 1, 2 and accelerator pedal released position switch are built into the accelerator work
unit. The sensor detects the accelerator pedal position and sends a signal to the ECM. The ECM uses the sig-
nal to determine the amount of fuel to be injected.
The accelerator pedal released position switch detects accelerator pedal released position signal and sends
this signal to the ECM. The ECM will then determine engine idle conditions. This signal is also used for diag-
nosing the accelerator pedal position sensor.
CONSULT-II Reference Value in Data Monitor ModeEBS0096W
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differ from ECM terminals voltage.
ECM Terminals and Reference ValueEBS0096X
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.
PBIB0463E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL POS SEN
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released 0.8 - 1.3V
Accelerator pedal: fully depressed More than 3.5V
ACCEL SEN 2*
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released 0.3 - 1.8V
Accelerator pedal: fully depressed More than 3.0V
OFF ACCEL SW
●Ignition switch: ON
(Engine stopped)Accelerator pedal: fully released ON
Accelerator pedal: slightly
depressed OFF
TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A21 BAccelerator pedal
released position switch
ground[Ignition switch “ON”]Approximately 0V
A22 LGAccelerator pedal position
sensor 1 ground[Ignition switch “ON”]Approximately 0V

EC-1532
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DTC P1510 ACCELERATOR PEDAL RELEASED POSITION SWITCH
On Board Diagnosis Logic
EBS0096Y
DTC Confirmation ProcedureEBS0096Z
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Depress and release fully accelerator pedal slowly.
4. If DTC is detected, go to EC-1534, "
Diagnostic Procedure" .
A26 LG/RAccelerator pedal position
sensor 2 ground[Ignition switch “ON”]Approximately 0V
A28 PU/RAccelerator pedal position
sensor 1 power supply [Ignition switch “ON”]Approximately 5V
B15 WAccelerator pedal position
sensor 1[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.8 - 1.3V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.5V
B16 GAccelerator pedal position
sensor 2[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully released0.3 - 1.8V
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully depressedMore than 3.0V
B23 GY/LAccelerator pedal position
sensor 2 power supply[Ignition switch “ON”]Approximately 5V
D14 G/YAccelerator pedal
released position switch[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal slightly depressedBATTERY VOLTAGE
(11 - 14V)
[Ignition switch “ON”]
●Engine stopped
●Accelerator pedal fully releasedApproximately 0V TERMI-
NAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1510
●The relation between accelerator pedal position
sensor 1, 2 signals and accelerator pedal position
switch signal is not in the normal range during the
specified accelerator pedal positions.●Harness or connectors
(Accelerator pedal released position switch circuit is
open or shorted.)
●Accelerator pedal released position switch
SEF817Y

DTC P1510 ACCELERATOR PEDAL RELEASED POSITION SWITCH
EC-1533
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Wiring DiagramEBS00970
TBWA0131E

EC-1534
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DTC P1510 ACCELERATOR PEDAL RELEASED POSITION SWITCH
Diagnostic Procedure
EBS00971
1. CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect accelerator work unit harness connector.
3. Turn ignition switch “ON”.
4. Check voltage between accelerator work unit terminal 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.
●Harness connectors F30, M63
●Harness for open or short between accelerator work unit and ECM
>> Repair harness or connectors.
3. CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH GROUND CIRCUIT FOR OPEN
AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between accelerator work unit terminal 4 and ECM terminal A21. Refer to Wir-
ing Diagram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
PBIB0379E
Voltage: Battery voltage
PBIB0365E
Continuity should exist.

DTC P1510 ACCELERATOR PEDAL RELEASED POSITION SWITCH
EC-1535
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4.DETECT MALFUNCTIONING PART
Check the following.
●Harness connectors F30, M63
●Harness for open or short between ECM and accelerator work unit
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.CHECK ACCELERATOR PEDAL RELEASED POSITION SWITCH
Refer to EC-1535, "
Component Inspection" .
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.REPLACE ACCELERATOR PEDAL ASSEMBLY
1. Replace accelerator pedal assembly.
2. Perform EC-1404, "
Accelerator Pedal Released Position Learning" .
>>INSPECTION END
7.CHECK INTERMITTENT INCIDENT
Refer to EC-1441, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00972
ACCELERATOR PEDAL RELEASED POSITION SWITCH
Check continuity between accelerator position switch terminals 4
and 5 under the following conditions.
Removal and InstallationEBS00973
ACCELERATOR WORK UNIT
Refer to ACC-2, "ACCELERATOR CONTROL SYSTEM" .
Conditions Continuity
Accelerator pedal fully released Should exist.
Accelerator pedal depressed Should not exist.
PBIB0366E

EC-1536
[YD]
DTC P1606 ECM
DTC P1606 ECM
PFP:23710
DescriptionEBS008YY
The ECM consists of a microcomputer and connectors for signal
input and output and for power supply. The ECM controls the engine.
On Board Diagnosis LogicEBS008YZ
DTC Confirmation ProcedureEBS008Z0
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If DTC is detected, go to EC-1536, "
Diagnostic Procedure" .
Diagnostic ProcedureEBS008Z1
1. INSPECTION START
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELF DIAG RESULTS” mode with CONSULT-II.
3. Touch “ERASE”.
4. Perform EC-1536, "
DTC Confirmation Procedure" , again.
5. Is DTC P1606 displayed again?
Ye s o r N o
Yes >> GO TO 2.
No >>INSPECTION END
PBIB0378E
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1606
●ECM calculation function is malfunctioning.●ECM
SEF817Y

DTC P1606 ECM
EC-1537
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2.REPLACE ECM
1. Replace ECM.
2. Perform initialization of NATS system and registration of all NATS ignition key IDs. Refer to EC-1406,
"NATS (Nissan Anti-theft System)" .
3. Perform "Accelerator Pedal Released Position Learning". Refer to EC-1404, "
Accelerator Pedal Released
Position Learning" .
>>INSPECTION END

EC-1538
[YD]
DTC P1621 ECM RELAY
DTC P1621 ECM RELAY
PFP:25230
ECM Terminals and Reference valveEBS009O8
On Board Diagnosis LogicEBS008Y3
DTC Confirmation ProcedureEBS008Y4
WITH CONSULT-II
1. Turn ignition switch “ON”.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Turn ignition switch “OFF”, wait at least 20 seconds and then
turn “ON”.
4. If DTC is detected, go to EC-1540, "
Diagnostic Procedure" .
TER-
MINAL
NO.WIRE
COLORITEM CONDITIONDATA
(DC Voltage and Pulse Signal)
A8
A9R
RPower supply for ECM[Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
D18
D19W/R
W/RIgnition switch [Ignition switch “ON”]BATTERY VOLTAGE
(11 - 14V)
D24
D26G
GECM relay (self-shutoff)[Ignition switch “ON”]
[Ignition switch “OFF”]
●For a few seconds after turning ignition switch
“OFF”Approximately 0V
[Ignition switch “OFF”]
●A few seconds passed after turning ignition
switch “OFF”BATTERY VOLTAGE
(11 - 14V)
DTC Malfunction is detected when ... Check Items (Possible Cause)
P1621
●An irregular voltage signal from the ECM relay is
sent to ECM.●Harness or connectors (ECM relay circuit is open or
shorted.)
●ECM relay
SEF817Y

DTC P1621 ECM RELAY
EC-1539
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Wiring DiagramEBS008ZC
TBWA0121E

EC-1540
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DTC P1621 ECM RELAY
Diagnostic Procedure
EBS008Y5
1. CHECK ECM POWER SUPPLY CIRCUIT
1. Turn ignition switch “OFF”.
2. Disconnect ECM relay.
3. Check voltage between ECM relay terminals 1, 6 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.
●Harness connectors E65, F6
●20A fuse
●Harness for open and short between ECM relay and battery
>> Repair open circuit or short to ground or short to power in harness or connectors.
3. CHECK ECM INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect ECM harness connector.
3. Check harness continuity between ECM terminals A8, A9 and ECM relay terminal 7. Refer to Wiring Dia-
gram.
4. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB0377E
Voltage: Battery voltage
PBIB0359E
Continuity should exist.