Infiniti G37 Coupe. Manual — part 554
P1236, P2118 THROTTLE CONTROL MOTOR
EC-397
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
CHECK THROTTLE CONTROL MOTOR
EC-397, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> GO TO 5.
4.
CHECK INTERMITTENT INCIDENT
GI-38, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair or replace harness or connectors.
5.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace malfunctioning electric throttle control actuator.
2.
Go to
EC-398, "Special Repair Requirement"
.
>> INSPECTION END
Component Inspection
INFOID:0000000001911020
1.
CHECK THROTTLE CONTROL MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect electric throttle control actuator harness connector.
3.
Check resistance between electric throttle control actuator terminals as follows.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace malfunctioning electric throttle control actuator.
2.
Go to
EC-398, "Special Repair Requirement"
.
DTC
Electric throttle control actuator
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1236
2
F27
5
F102
49
Existed
50
Not existed
6
49
Not existed
50
Existed
P2118
1
F6
1
F101
2
Existed
4
Not existed
2
2
Not existed
4
Existed
Electric throttle control actuator
Resistance
Bank
Terminals
1
1 and 2
Approx. 1 - 15
Ω
[at 25
°
C (77
°
F)]
2
5 and 6
EC-398
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P1236, P2118 THROTTLE CONTROL MOTOR
>> INSPECTION END
Special Repair Requirement
INFOID:0000000001910850
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-18, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-19, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-399
< COMPONENT DIAGNOSIS >
[VQ37VHR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
Description
INFOID:0000000001734211
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.
DTC Logic
INFOID:0000000001734212
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following before conduct-
ing the next test.
1.
Turn ignition switch OFF and wait at least 10 seconds.
2.
Turn ignition switch ON.
3.
Turn ignition switch OFF and wait at least 10 seconds.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION A AND B
1.
Turn ignition switch ON and wait at least 1 second.
2.
Shift selector lever to D position (A/T) or 1st position (M/T) and wait at least 3 seconds.
3.
Shift selector lever to P position (A/T) or Neutral position (M/T).
4.
Turn ignition switch OFF and wait at least 10 seconds.
5.
Turn ignition switch ON and wait at least 1 second.
6.
Shift selector lever to D position (A/T) or 1st position (M/T) and wait at least 3 seconds.
7.
Shift selector lever to P position (A/T) or Neutral position (M/T).
8.
Turn ignition switch OFF, wait at least 10 seconds, and then turn ON.
9.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> GO TO 3.
3.
PERFORM DTC CONFIRMATION PROCEDURE FOR MALFUNCTION C
1.
Turn ignition switch ON and wait at least 1 second.
2.
Shift selector lever to D position (A/T) or 1st position (M/T) and wait at least 3 seconds.
3.
Shift selector lever to P position (A/T) or Neutral position (M/T).
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1238
Electric throttle control
actuator (bank 2)
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.
P2119
Electric throttle control
actuator (bank 1)
A)
Electric throttle control actuator does not func-
tion properly due to the return spring malfunc-
tion.
B)
Throttle valve opening angle in fail-safe mode is
not in specified range.
C)
ECM detect the throttle valve is stuck open.
EC-400
< COMPONENT DIAGNOSIS >
[VQ37VHR]
P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
4.
Start engine and let it idle for 3 seconds.
5.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001911019
1.
CHECK ELECTRIC THROTTLE CONTROL ACTUATOR VISUALLY
1.
Turn ignition switch OFF.
2.
Remove the intake air duct.
3.
Check if foreign matter is caught between the throttle valve (1)
and the housing.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Remove the foreign matter and clean the electric throttle
control actuator inside.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace malfunctioning electric throttle control actuator.
2.
Go to
EC-400, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000001910851
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-18, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-19, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
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