Nissan Pathfinder (2005 year). Instruction — part 196
DTC P1121 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-419
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EC
2005 Pathfinder
PROCEDURE FOR MALFUNCTION C
With CONSULT-II
1.
Turn ignition switch ON and wait at least 1 second.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Shift selector lever to D position and wait at least 3 seconds.
4.
Shift selector lever to P or N position.
5.
Start engine and let it idle for 3 seconds.
6.
If DTC is detected, go to
EC-419, "Diagnostic Procedure"
.
With GST
Follow the procedure “WITH CONSULT-II” above.
Diagnostic Procedure
UBS00KC4
1.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1.
Remove the intake air duct.
2.
Check if a foreign matter is caught between the throttle valve
and the housing.
OK or NG
OK
>> GO TO 2.
NG
>> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace the electric throttle control actuator.
2.
Perform
EC-88, "Throttle Valve Closed Position Learning"
.
3.
Perform
EC-89, "Idle Air Volume Learning"
.
>> INSPECTION END
SEF058Y
BBIA0554E
EC-420
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
2005 Pathfinder
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
PFP:16119
Description
UBS00KC5
NOTE:
If DTC P1122 is displayed with DTC P1121 or 1126, first perform the trouble diagnosis for DTC P1121 or
P1126. Refer to
or
.
Electric throttle control actuator consists of throttle control motor, throttle position sensor, etc.
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.
On Board Diagnosis Logic
UBS00KC6
This self-diagnosis has the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MIL lights up.
DTC Confirmation Procedure
UBS00KC7
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 11V when the
engine is running.
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-422, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1122
1122
Electric throttle control
performance problem
Electric throttle control function does not oper-
ate properly.
●
Harness or connectors
(Throttle control motor circuit is open or
shorted)
●
Electric throttle control actuator
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
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-421
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2005 Pathfinder
Wiring Diagram
UBS00KC8
BBWA1759E
EC-422
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
2005 Pathfinder
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.
Diagnostic Procedure
UBS00KC9
1.
CHECK GROUND CONNECTIONS
1.
Turn ignition switch OFF
2.
Loosen and retighten three ground screws on the body. Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace ground connections.
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
3
V
Throttle control motor relay
power supply
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
4
L/W
Throttle control motor
(Close)
[Ignition switch: ON]
●
Engine: Stopped
●
Shift lever: D
●
Accelerator pedal: Released
0 - 14V
5
L/B
Throttle control motor
(Open)
[Ignition switch: ON]
●
Engine: Stopped
●
Shift lever: D
●
Accelerator pedal: Fully depressed
0 - 14V
104
O
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
PBIB1104E
PBIB1105E
BBIA0539E
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-423
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2005 Pathfinder
2.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-I
1.
Check voltage between ECM terminal 3 and ground under the
following conditions with CONSULT-II or tester.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 3.
3.
CHECK THROTTLE CONTROL MOTOR RELAY INPUT SIGNAL CIRCUIT-II
1.
Turn ignition switch OFF.
2.
Disconnect ECM harness connector.
3.
Disconnect IPDM E/R harness connector E119.
4.
Check continuity between ECM terminal 3 and IPDM E/R terminal 6.
Refer to Wiring Diagram.
5.
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 E2, F32
●
Harness for open or short between ECM and IPDM E/R
>> Repair open circuit or short to ground or short to power in harness or connectors.
5.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-I
1.
Reconnect all harness connectors disconnected.
2.
Turn ignition switch OFF.
3.
Check voltage between ECM terminal 104 and ground with
CONSULT-II or tester.
OK or NG
OK
>> GO TO 9.
NG
>> GO TO 6.
Ignition switch
Voltage
OFF
Approximately 0V
ON
Battery voltage
(11 - 14V)
MBIB0028E
Continuity should exist.
Voltage: Battery voltage
PBIB1171E
EC-424
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
2005 Pathfinder
6.
CHECK THROTTLE CONTROL MOTOR RELAY POWER SUPPLY CIRCUIT-II
1.
Disconnect ECM harness connector.
2.
Disconnect IPDM E/R harness connector E122.
3.
Check continuity between ECM terminal 104 and IPDM E/R terminal 47.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 7.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
7.
CHECK FUSE
1.
Disconnect 20A fuse.
2.
Check 20A fuse for blown.
OK or NG
OK
>> GO TO 8.
NG
>> Replace 20A fuse.
8.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> Replace IPDM E/R. Refer to
PG-17, "IPDM E/R (INTELLIGENT POWER DISTRIBUTION MOD-
.
NG
>> Repair or replace harness or connectors.
9.
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 10.
NG
>> Repair or replace.
Continuity should exist.
Electric throttle control
actuator terminal
ECM terminal
Continuity
5
5
Should not exist
4
Should exist
6
5
Should exist
4
Should not exist
BBIA0543E
DTC P1122 ELECTRIC THROTTLE CONTROL FUNCTION
EC-425
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EC
2005 Pathfinder
10.
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 11.
NG
>> Remove the foreign matter and clean the electric throttle
control actuator inside.
11.
CHECK THROTTLE CONTROL MOTOR
Refer to
EC-425, "Component Inspection"
.
OK or NG
OK
>> GO TO 12.
NG
>> GO TO 13.
12.
CHECK INTERMITTENT INCIDENT
Refer to
EC-158, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
.
OK or NG
OK
>> GO TO 13.
NG
>> Repair or replace harness or connectors.
13.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace the electric throttle control actuator.
2.
Perform
EC-88, "Throttle Valve Closed Position Learning"
.
3.
Perform
EC-89, "Idle Air Volume Learning"
.
>> INSPECTION END
Component Inspection
UBS00KCA
THROTTLE CONTROL MOTOR
1.
Disconnect electric throttle control actuator harness connector.
2.
Check resistance between terminals 5 and 6.
3.
If NG, replace electric throttle control actuator and go to next
step.
4.
Perform
EC-88, "Throttle Valve Closed Position Learning"
.
5.
Perform
EC-89, "Idle Air Volume Learning"
.
Removal and Installation
UBS00KCB
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
EM-16, "INTAKE MANIFOLD COLLECTOR"
.
BBIA0554E
Resistance: Approximately 1 - 15
Ω
[at 25
°
C (77
°
F)]
PBIB2606E
EC-426
DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
2005 Pathfinder
DTC P1124, P1126 THROTTLE CONTROL MOTOR RELAY
PFP:16119
Component Description
UBS00KCC
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 Mode
UBS00KCD
Specification data are reference values.
On Board Diagnosis Logic
UBS00KCE
These self-diagnoses have the one trip detection logic.
FAIL-SAFE MODE
When the malfunction is detected, ECM enters fail-safe mode and the MlL lights up.
DTC Confirmation Procedure
UBS00KCF
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-429, "Diagnostic Procedure"
.
MONITOR ITEM
CONDITION
SPECIFICATION
THRTL RELAY
●
Ignition switch: ON
ON
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1124
1124
Throttle control motor
relay circuit short
ECM detects the throttle control motor relay is
stuck ON.
●
Harness or connectors
(Throttle control motor relay circuit is
shorted)
●
Throttle control motor relay
P1126
1126
Throttle control motor
relay circuit open
ECM 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
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