NISSAN X-TRAIL 2003 Service Repair Manual

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-673
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

Wiring DiagramEBS0110P
LHD MODELS
TBWA0613E

EC-674
[QR (WITHOUT EURO-OBD)]
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION

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.) TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
3W/BThrottle control motor
relay power supply[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4GThrottle control motor
(Close)[Ignition switch: ON]

Engine stopped

Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Released0 - 14V
5RThrottle control motor
(Open)[Ignition switch: ON]

Engine stopped

Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Fully depressed0 - 14V
104 W/BThrottle control motor
relay[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]0 - 1.0V
PBIB1104E
PBIB1105E

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-675
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

RHD MODELS
TBWA0614E

EC-676
[QR (WITHOUT EURO-OBD)]
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION

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.) TERMI-
NAL
NO.WIRE
COLORITEM CONDITION DATA (DC Voltage)
3W/BThrottle control motor
relay power supply[Ignition switch: ON]BATTERY VOLTAGE
(11 - 14V)
4GThrottle control motor
(Close)[Ignition switch: ON]

Engine stopped

Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Released0 - 14V
5RThrottle control motor
(Open)[Ignition switch: ON]

Engine stopped

Shift lever: D (A/T), 1st (M/T)

Accelerator pedal: Fully depressed0 - 14V
104 W/BThrottle control motor
relay[Ignition switch: OFF]BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]0 - 1.0V
PBIB1104E
PBIB1105E

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-677
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

Diagnostic ProcedureEBS0110Q
1. CHECK GROUND CONNECTIONS
1. Turn ignition switch OFF.
2. Loosen and retighten ground three screws on the body.
Refer to EC-578, "
Ground Inspection" .
OK or NG
OK >> GO TO 2.
NG >> Repair or replace ground connections.
2. CHECK THROTTLE CONTROL MOTOR RELAY SIGNAL CIRCUIT
Check voltage between ECM terminal 3 and ground under the fol-
lowing conditions with CONSULT-II or tester.
OK or NG
OK >> GO TO 10.
NG >> GO TO 3.
PBIB2021E
Ignition switch Voltage
OFF Approximately 0V
ONBattery voltage
(11 - 14V)
MBIB0028E

EC-678
[QR (WITHOUT EURO-OBD)]
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION

3. CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect throttle control motor relay.
3. Check voltage between throttle control motor relay terminals 2, 5
and ground with CONSULT-II or tester.
OK or NG
OK >> GO TO 5.
NG >> GO TO 4.
4. 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.
5. CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT
1. Disconnect ECM harness connector.
2. Check harness continuity between throttle control motor relay terminal 3 and ECM terminal 3.
Refer to Wiring Diagram.
3. 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 E61, F38

Harness for open or short between throttle control motor relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
PBIB1972E
Voltage: Battery voltage
PBIB0575E
Continuity should exist.

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-679
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

7. CHECK THROTTLE CONTROL MOTOR RELAY OUTPUT SIGNAL CIRCUIT
1. Check continuity between throttle control motor relay terminal 1 and ECM terminal 104.
Refer to Wiring Diagram.
2. Also check harness for short to ground and short to power.
OK or NG
OK >> GO TO 9.
NG >> GO TO 8.
8. DETECT MALFUNCTIONING PART
Check the following.

Harness connectors E116, M75 (LHD models)

Harness connectors E106, M14 (RHD models)

Harness for open or short between throttle control motor relay and ECM
>> Repair open circuit or short to ground or short to power in harness or connectors.
9. CHECK THROTTLE CONTROL MOTOR RELAY
Refer to EC-680, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> Replace throttle control motor relay.
10. CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR 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 11.
NG >> Repair or replace.Continuity should exist.
Electric throttle control
actuator terminalECM terminal Continuity
34 Should exist
5 Should not exist
64 Should not exist
5 Should exist
PBIB1992E
PBIB1971E

EC-680
[QR (WITHOUT EURO-OBD)]
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION

11 . CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1. Remove the intake air duct.
2. Check if foreign matter is caught between the throttle valve and
the housing.
OK or NG
OK >> GO TO 12.
NG >> Remove the foreign matter and clean the electric throttle
control actuator inside.
12. CHECK THROTTLE CONTROL MOTOR
Refer to EC-680, "
Component Inspection" .
OK or NG
OK >> GO TO 13.
NG >> GO TO 14.
13. CHECK INTERMITTENT INCIDENT
Refer to EC-570, "
TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT" .
OK or NG
OK >> GO TO 14.
NG >> Repair or replace harness or connectors.
14. REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1. Replace the electric throttle control actuator.
2. Perform EC-508, "
Throttle Valve Closed Position Learning" .
3. Perform EC-508, "
Idle Air Volume Learning" .
>>INSPECTION END
Component InspectionEBS0110R
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.
THROTTLE CONTROL MOTOR
1. Disconnect electric throttle control actuator harness connector.
PBIB0518E
Conditions Continuity
12V direct current supply between terminals
1 and 2Ye s
No current supply No
PBIB0098E

DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-681
[QR (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
MA
EC

2. Check resistance between terminals 3 and 6.
3. If NG, replace electric throttle control actuator and go to next
step.
4. Perform EC-508, "
Throttle Valve Closed Position Learning" .
5. Perform EC-508, "
Idle Air Volume Learning" .
Removal and InstallationEBS0110S
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to EM-17, "INTAKE MANIFOLD" . Resistance: Approximately 1 - 15 Ω [at 25 °C (77°F)]
PBIB0095E

EC-682
[QR (WITHOUT EURO-OBD)]
DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY

DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAYPFP:16119
Component DescriptionEBS0110T
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 ModeEBS0110U
Specification data are reference values.
On Board Diagnosis LogicEBS0110V
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the DTC detected, the ECM enters fail-safe mode and the MI lights up.
DTC Confirmation ProcedureEBS0110W
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.
PROCEDURE FOR DTC P1124
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 8V.
With CONSULT-II
1. Turn ignition switch ON and wait at least 1 second.
2. Select “DATA MONITOR” mode with CONSULT-II.
3. If DTC is detected, go to EC-687, "
Diagnostic Procedure" .
MONITOR ITEM CONDITION SPECIFICATION
THRTL RELAY

Ignition switch: ON ON
DTC No. Trouble diagnosis name DTC detecting condition Possible cause
P1124
1124Throttle control motor
relay circuit shortECM detect the throttle control motor relay
is stuck ON.

Harness or connectors
(Throttle control motor relay circuit is shorted.)

Throttle control motor relay
P1126
1126Throttle control motor
relay circuit openECM detects a voltage of power source for
throttle control motor is excessively low.

Harness or connectors
(Throttle control motor relay circuit is open.)

Throttle control motor relay
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.
SEF058Y