Page 945 of 3833
DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
EC-595
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Wiring DiagramEBS00NI1
TBWA0153E
Page 946 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-596
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DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
Diagnostic Procedure
EBS00NI2
1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Dis NISSAN X-TRAIL 2001 Service Repair Manual EC-596
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DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
Diagnostic Procedure
EBS00NI2
1. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY
1. Turn ignition switch “OFF”.
2. Dis](/manual-img/5/57405/w960_57405-945.png)
EC-596
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DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
Diagnostic Procedure
EBS00NI2
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.
Page 947 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
EC-597
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5.CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check continuit NISSAN X-TRAIL 2001 Service Repair Manual DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
EC-597
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5.CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check continuit](/manual-img/5/57405/w960_57405-946.png)
DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
EC-597
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5.CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Check continuity between ECM terminal 112 and throttle control motor relay terminal 1.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 7.
NG >> GO TO 6.
6.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.
7.CHECK THROTTLE CONTROL MOTOR RELAY
Refer to EC-597, "
Component Inspection" .
OK or NG
OK >> GO TO 8.
NG >> Replace throttle control motor relay.
8.CHECK INTERMITTENT INCIDENT
Refer to EC-506, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
>>INSPECTION END
Component InspectionEBS00NI3
THROTTLE CONTROL MOTOR RELAY
1. Apply 12V direct current between relay terminals 1 and 2.
2. Check continuity between relay terminals 3 and 5.
3. If NG, replace throttle control motor relay.Continuity should exist.
Conditions Continuity
12V direct current supply between terminals 1 and 2 Yes
No current supply No
PBIB0098E
Page 948 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual EC-598
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DTC P1128 THROTTLE CONTROL MOTOR
DTC P1128 THROTTLE CONTROL MOTOR
PFP:16119
Component DescriptionEBS00NI4
The throttle control motor is operated by the ECM and it opens NISSAN X-TRAIL 2001 Service Repair Manual EC-598
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DTC P1128 THROTTLE CONTROL MOTOR
DTC P1128 THROTTLE CONTROL MOTOR
PFP:16119
Component DescriptionEBS00NI4
The throttle control motor is operated by the ECM and it opens](/manual-img/5/57405/w960_57405-947.png)
EC-598
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DTC P1128 THROTTLE CONTROL MOTOR
DTC P1128 THROTTLE CONTROL MOTOR
PFP:16119
Component DescriptionEBS00NI4
The throttle control motor is operated by the ECM and it opens and closes the throttle valve.
The current opening angle of the throttle valve is detected by the throttle position sensor and it provides feed-
back to the ECM to control the throttle control motor to make the throttle valve opening angle properly in
response to driving condition.
ECM Terminals and Reference ValueEBS00NI5
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT-II.
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.)
On Board Diagnosis LogicEBS00NI6
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, the ECM enters fail-safe mode and the MI lights up.
DTC Confirmation ProcedureEBS00NI7
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.
TER-
MINAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
11 4 RThrottle control motor
(Open)[Ignition switch “ON”]
●Engine stopped
●Gear position is “D” (A/T model)
●Gear position is “1st” (M/T model)
●Accelerator pedal is depressing0 - 14V
11 5 B / YThrottle control motor
ground[Engine is running]
●Idle speedApproximately 0V
11 6 GThrottle control motor
(Close)[Ignition switch “ON”]
●Engine stopped
●Gear position is “D” (A/T model)
●Gear position is “1st” (M/T model)
●Accelerator pedal is releasing0 - 14V
PBIB0533E
PBIB0534E
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1128
11 2 8Throttle control motor
circuit shortECM detects short in both circuits between
ECM and throttle control motor.
●Harness or connectors
(Throttle control motor circuit is shorted.)
●Electric throttle control actuator
(Throttle control motor)
Engine operating condition in fail-safe mode
ECM stops the electric throttle control actuator control, throttle valve is maintained at a fixed opening (approx. 5 degrees) by the return
spring.
Page 949 of 3833
DTC P1128 THROTTLE CONTROL MOTOR
EC-599
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WITH CONSULT-II
1. Turn ignition switch “ON” and wait at least 2 seconds.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. Start engine and let it idle for 5 seconds.
4. If DTC is detected, go to EC-601, "
Diagnostic Procedure" .
WITHOUT CONSULT-II
1. Turn ignition switch “ON” and wait at least 2 seconds.
2. Start engine and let it idle for 5 seconds.
3. Turn ignition switch “OFF”, wait at least 10 seconds and then turn “ON”.
4. Perform “Diagnostic Test Mode II (Self-diagnostic results)” with ECM.
5. If DTC is detected, go to EC-601, "
Diagnostic Procedure" .
SEF058Y
Page 950 of 3833
EC-600
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DTC P1128 THROTTLE CONTROL MOTOR
Wiring Diagram
EBS00NI8
TBWA0186E
Page 951 of 3833
![NISSAN X-TRAIL 2001 Service Repair Manual DTC P1128 THROTTLE CONTROL MOTOR
EC-601
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Diagnostic ProcedureEBS00NI9
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retig NISSAN X-TRAIL 2001 Service Repair Manual DTC P1128 THROTTLE CONTROL MOTOR
EC-601
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Diagnostic ProcedureEBS00NI9
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retig](/manual-img/5/57405/w960_57405-950.png)
DTC P1128 THROTTLE CONTROL MOTOR
EC-601
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Diagnostic ProcedureEBS00NI9
1.RETIGHTEN GROUND SCREWS
1. Turn ignition switch “OFF”.
2. Loosen and retighten engine ground screws.
>> GO TO 2.
2.CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch “OFF”.
2. Disconnect electric throttle control actuator harness connector.
3. Disconnect ECM harness connector.
4. Check harness continuity between the following terminals.
Refer to Wiring Diagram.
5. 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 ground or short to power in harness or connectors.
3.CHECK THROTTLE CONTROL MOTOR
Refer to EC-602, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 5.
4.CHECK INTERMITTENT INCIDENT
Refer to EC-506, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace harness or connectors.
5.REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-449, "
Throttle Valve Closed Position Learning" .
3. Perform EC-450, "
Idle Air Volume Learning" .
>>INSPECTION END
PBIB0925E
Electric throttle control
actuator terminalECM terminal Continuity
6114 Should exist
116 Should not exist
3114 Should not exist
116 Should exist
PBIB0497E
Page 952 of 3833
EC-602
[QR25(WITHOUT EURO-OBD)]
DTC P1128 THROTTLE CONTROL MOTOR
Component Inspection
EBS00NIA
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
2. Check resistance between terminals 3 and 6.
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-449, "
Throttle Valve Closed Position Learning" .
5. Perform EC-450, "
Idle Air Volume Learning" .
Remove and InstallationEBS00NIB
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-16, "INTAKE MANIFOLD" . Resistance: Approximately 1 - 15 Ω [at 25 °C (77°F)]
PBIB0095E