Infiniti Q45. Manual — part 501
DTC P2118 THROTTLE CONTROL MOTOR
EC-643
C
D
E
F
G
H
I
J
K
L
M
A
EC
2.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN OR SHORT
1.
Disconnect electric throttle control actuator harness connector.
2.
Disconnect ECM harness connector.
3.
Check harness continuity between the following terminals.
Refer to Wiring Diagram.
4.
Also check harness for short to ground and short to power.
OK or NG
OK
>> GO TO 3.
NG
>> Repair or replace.
3.
CHECK THROTTLE CONTROL MOTOR
Refer to
EC-643, "Component Inspection"
OK or NG
OK
>> GO TO 4.
NG
>> GO TO 5.
4.
CHECK INTERMITTENT INCIDENT
Refer to
EC-145, "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-78, "Throttle Valve Closed Position Learning"
3.
Perform
EC-78, "Idle Air Volume Learning"
>> INSPECTION END
Component Inspection
NBS00207
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-78, "Throttle Valve Closed Position Learning"
5.
Perform
EC-78, "Idle Air Volume Learning"
Electric throttle control
actuator terminal
ECM terminal
Continuity
3
5
Should not exist
4
Should exist
6
5
Should exist
4
Should not exist
PBIB2420E
Resistance: Approximately 1 - 15
Ω
[at 25
°
C (77
°
F)]
PBIB0095E
EC-644
DTC P2118 THROTTLE CONTROL MOTOR
Removal and Installation
NBS00208
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-645
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
PFP:16119
Component Description
NBS001ZK
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 throttle position sensor detects the throttle valve position, and the opening and closing speed of the throt-
tle valve and feeds the voltage signals to the ECM. The ECM judges the current opening angle of the throttle
valve from these signals and the ECM controls the throttle control motor to make the throttle valve opening
angle properly in response to driving condition.
On Board Diagnosis Logic
NBS001ZL
This self-diagnosis has 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
NBS001ZM
NOTE:
●
Perform PROCEDURE FOR MALFUNCTION A AND B first. If the DTC cannot be confirmed, perform
PROCEDURE FOR MALFUNCTION C.
●
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 MALFUNCTION A AND B
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 position.
5.
Turn ignition switch OFF and wait at least 10 seconds.
6.
Turn ignition switch ON and wait at least 1 second.
7.
Shift selector lever to D position and wait at least 3 seconds.
8.
Shift selector lever to P position.
9.
Turn ignition switch OFF, wait at least 10 seconds, and then turn
ON.
EC-646, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2119
2119
Electric throttle control
actuator
A)
Electric throttle control actuator does not func-
tion properly due to the return spring malfunc-
tion.
●
Electric throttle control actuator
B)
Throttle valve opening angle in fail-safe mode is
not in specified range.
C)
ECM detect the throttle valve is stuck open.
Detected items
Engine operating condition in fail-safe mode
Malfunction A
The ECM controls the electric throttle actuator by regulating the throttle opening around the idle position.
The engine speed will not rise more than 2,000 rpm.
Malfunction B
ECM controls the electric throttle control actuator by regulating the throttle opening to 20 degrees or less.
Malfunction C
While the vehicle is driving, it slows down gradually by fuel cut. After the vehicle stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or more.
SEF058Y
EC-646
DTC P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
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 N, P position.
5.
Start engine and let it idle for 3 seconds.
6.
If DTC is detected, go to
EC-646, "Diagnostic Procedure"
.
With GST
Follow the procedure “With CONSULT-II” above.
Diagnostic Procedure
NBS001ZN
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-78, "Throttle Valve Closed Position Learning"
3.
Perform
EC-78, "Idle Air Volume Learning"
>> INSPECTION END
SEF058Y
PBIB2439E
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