2003 NISSAN X-TRAIL Electronic Repair Manual

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Page 1393 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1123 THROTTLE CONTROL MOTOR RELAY
EC-279
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DTC P1123 THROTTLE CONTROL MOTOR RELAYPFP:16119
Component DescriptionEBS00CZR
Power supply for the Throttle

DTC P1123 THROTTLE CONTROL MOTOR RELAY
EC-279
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DTC P1123 THROTTLE CONTROL MOTOR RELAYPFP:16119
Component DescriptionEBS00CZR
Power supply for the Throttle Control motor is provided to the ECM via throttle control motor relay. The throttle
control motor relay is ON/OFF controlled by the ECM. When the ignition switch is turned ON, the ECM sends
an ON signal to throttle control motor relay and battery voltage is provided to the ECM. When the ignition
switch is turned OFF, the ECM sends an OFF signal to throttle control motor relay and battery voltage is not
provided to the ECM.
CONSULT-II Reference Value in Data Monitor ModeEBS00CZS
Specification data are reference values.
ECM Terminals and Reference ValueEBS00CZT
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 LogicEBS00CZU
FAI L-S AFE MO DE
ECM enters fail-safe mode when the malfunction A is detected.
DTC Confirmation ProcedureEBS00CZV
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch “OFF” and wait at
least 10 seconds before conducting the next test.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10V at idle.
WITH CONSULT-II
1. Turn ignition switch “ON” and wait at least 1 second.
MONITOR ITEM CONDITION SPECIFICATION
THRTL RELAY
lIgnition switch: ON ON
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
11 2 W / RThrottle control motor
relay[Ignition switch "OFF"]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch "ON"]0-1.0V
11 3 W / BThrottle control motor
relay power supply[Ignition switch "ON"]BATTERY VOLTAGE
(11 - 14V)
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1123
11 2 3Throttle control motor
relay circuitA)ECM detect the throttle control motor relay is
stuck ON.
lHarness or connectors
(Throttle control motor relay cir-
cuit is open or shorted.)
lThrottle control motor relay B)ECM detect the throttle control motor relay is
stuck OFF.
Detected items Engine operating condition in fail-safe mode
Malfunction AECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening
(approx. 5 degrees) by the return spring.

Page 1394 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-280
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DTC P1123 THROTTLE CONTROL MOTOR RELAY
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If 1st trip DTC is detected, go toEC-282, "
Diagnostic Procedure"
.
WITH GST
Fo

Page 1395 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1123 THROTTLE CONTROL MOTOR RELAY
EC-281
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Wiring DiagramEBS00CZW
TBWA0093E

Page 1396 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-282
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DTC P1123 THROTTLE CONTROL MOTOR RELAY
Diagnostic Procedure
EBS00CZX
1.CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Disconnect thro

Page 1397 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1123 THROTTLE CONTROL MOTOR RELAY
EC-283
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5.CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check continuity between E

Page 1398 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-284
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DTC P1143 HO2S1
DTC P1143 HO2S1
PFP:22690
Component DescriptionEBS00BBD
The heated oxygen sensor 1 is placed into the front tube. It detects
the amount of oxygen in the exh

Page 1399 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual DTC P1143 HO2S1
EC-285
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On Board Diagnosis LogicEBS00BBG
To judge the malfunction, the output from the heated oxygen sensor
1 is monitored to determine wh

Page 1400 of 3066

NISSAN X-TRAIL 2003 Electronic Repair Manual EC-286
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DTC P1143 HO2S1
6. When the following conditions are met, “TESTING” will be dis-
played on the CONSULT-II screen. Maintain the conditions con-
tinuously until “TESTIN

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