Infiniti Q45. Manual — part 500
DTC P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-639
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EC
Component Inspection
NBS001ZT
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.
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"
Removal and Installation
NBS001ZU
ELECTRIC THROTTLE CONTROL ACTUATOR
Refer to
Conditions
Continuity
12V direct current supply between terminals
1 and 2
Yes
No current supply
No
PBIB0098E
Resistance: Approximately 1 - 15
Ω
[at 25
°
C (77
°
F)]
PBIB0095E
EC-640
DTC P2118 THROTTLE CONTROL MOTOR
DTC P2118 THROTTLE CONTROL MOTOR
PFP:16119
Component Description
NBS00202
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
NBS00203
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 MIL lights up.
DTC Confirmation Procedure
NBS00204
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.
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-642, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P2118
2118
Throttle control motor
circuit short
ECM 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.
SEF058Y
DTC P2118 THROTTLE CONTROL MOTOR
EC-641
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EC
Wiring Diagram
NBS00205
TBWM1239E
EC-642
DTC P2118 THROTTLE CONTROL MOTOR
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.)
Diagnostic Procedure
NBS00206
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
L
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
●
Selector lever: D
●
Accelerator pedal: Released
0 - 14V
5
L/B
Throttle control motor
(Open)
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully depressed
0 - 14V
104
OR
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
PBIB1104E
PBIB1105E
PBIB2417E
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