2003 NISSAN X-TRAIL Service Repair Manual

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Page 761 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P1805 BRAKE SWITCH
EC-383
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2. CHECK STOP LAMP SWITCH POWER SUPPLY CIRCUIT
1. Disconnect stop lamp switch harness connector.
2. Check voltage betwee

Page 762 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-384
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DTC P1805 BRAKE SWITCH

4. CHECK STOP LAMP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Disconnect stop lamp switch harness connector.
2. Disconnect ECM harness conne

Page 763 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P1805 BRAKE SWITCH
EC-385
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M/T Models
1. Disconnect stop lamp switch harness connector.
2. Check continuity between stop lamp switch terminals 1 and

Page 764 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-386
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DTC P2122, P2123 APP SENSOR

DTC P2122, P2123 APP SENSORPFP:18002
Component DescriptionEBS010UA
The accelerator pedal position sensor is installed on the upper end
of the

EC-386
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DTC P2122, P2123 APP SENSOR

DTC P2122, P2123 APP SENSORPFP:18002
Component DescriptionEBS010UA
The accelerator pedal position sensor is installed on the upper end
of the accelerator pedal assembly. The sensor detects the accelera-
tor position and sends a signal to the ECM.
Accelerator pedal position sensor has two sensors. These sensors
are a kind of potentiometers which transform the accelerator pedal
position into output voltage, and emit the voltage signal to the ECM.
In addition, these sensors detect the opening and closing speed of
the accelerator pedal and feed the voltage signals to the ECM. The
ECM judges the current opening angle of the accelerator pedal from
these signals and controls the throttle control motor based on these
signals.
Idle position of the accelerator pedal is determined by the ECM
receiving the signal from the accelerator pedal position sensor. The ECM uses this signal for the engine oper-
ation such as fuel cut.
CONSULT-II Reference Value in Data Monitor ModeEBS010UB
Specification data are reference values.
*: Accelerator pedal position sensor 2 signal is converted by ECM internally. Thus, it differs from ECM terminal voltage.
On Board Diagnosis LogicEBS010UC
These self-diagnoses have the one trip detection logic.
NOTE:
If DTC P2122 or P2123 is displayed with DTC P1229, first perform the trouble diagnosis for DTC P1229.
Refer to EC-368
.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
PBIB1741E
MONITOR ITEM CONDITION SPECIFICATION
ACCEL SEN1
Ignition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.5 - 1.0V
Accelerator pedal: Fully depressed 4.0 - 4.7V
ACCEL SEN2*
Ignition switch: ON
(engine stopped)Accelerator pedal: Fully released 0.3 - 1.2V
Accelerator pedal: Fully depressed 3.9 - 4.8V
CLSD THL POS
Ignition switch: ONAccelerator pedal: Fully released ON
Accelerator pedal: Slightly depressed OFF
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P2122
2122Accelerator pedal position
sensor 1 circuit low inputAn excessively low voltage from the APP sensor 1
is sent to ECM.
Harness or connectors
(The APP sensor 1 circuit is open or
shorted.)
Accelerator pedal position sensor
(Accelerator pedal position sensor 1) P2123
2123Accelerator pedal position
sensor 1 circuit high inputAn excessively high voltage from the APP sensor 1
is sent to ECM.
Engine operating condition in fail-safe mode
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 normal condition.
So, the acceleration will be poor.

Page 765 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P2122, P2123 APP SENSOR
EC-387
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DTC Confirmation ProcedureEBS010UD
NOTE:
If DTC Confirmation Procedure has been previously conducted, always turn ig

Page 766 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-388
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DTC P2122, P2123 APP SENSOR

Wiring DiagramEBS010UE
TBWA0624E

Page 767 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual DTC P2122, P2123 APP SENSOR
EC-389
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Specification data are reference values and are measured between each terminal and ground.
CAUTION:
Do not use ECM g

Page 768 of 4179

NISSAN X-TRAIL 2003 Service Repair Manual EC-390
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DTC P2122, P2123 APP SENSOR

Diagnostic ProcedureEBS010UF
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body.

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