Infiniti QX56 (Z62). Manual — part 621
EC-462
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
2.
Disconnect electric throttle control actuator harness connector.
3.
Disconnect ECM harness connector.
4.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
5.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 9.
NO
>> Repair or replace.
9.
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.
Is the inspection result normal?
YES
>> GO TO 10.
NO
>> Remove the foreign matter and clean the electric throttle control actuator inside, then perform
throttle valve closed position learning. Refer to
10.
CHECK THROTTLE CONTROL MOTOR
EC-462, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 11.
NO
>> GO TO 12.
11.
CHECK INTERMITTENT INCIDENT
GI-40, "Intermittent Incident"
Is the inspection result normal?
YES
>> GO TO 12.
NO
>> Repair or replace harness or connectors.
12.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace malfunction electric throttle control actuator. Refer to
EM-30, "Removal and Installation"
.
2.
EC-463, "Special Repair Requirement"
>> INSPECTION END
Component Inspection
INFOID:0000000006217965
1.
CHECK THROTTLE CONTROL MOTOR
1.
Turn ignition switch OFF.
2.
Disconnect electric throttle control actuator harness connector.
3.
Check the resistance between electric throttle control actuator terminals as per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
Electric throttle control actuator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F66
5
F110
57
Not existed
63
Existed
6
57
Existed
63
Not existed
Terminals
Resistance
5 and 6
Approx. 1 - 15
Ω
[at 25
°
C (77
°
F)]
P2101 ELECTRIC THROTTLE CONTROL FUNCTION
EC-463
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace electric throttle control actuator. Refer to
EM-30, "Removal and Installation"
.
2.
EC-463, "Special Repair Requirement"
>> INSPECTION END
Special Repair Requirement
INFOID:0000000006217966
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
>> END
EC-464
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
P2118 THROTTLE CONTROL MOTOR
P2118 THROTTLE CONTROL MOTOR
DTC Logic
INFOID:0000000006217967
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at
least 10 seconds before conducting the next test.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Turn ignition switch ON and wait at least 2 seconds.
2.
Start engine and let it idle for 5 seconds.
3.
Check DTC.
Is DTC detected?
YES
>> Go to
.
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000006217968
1.
CHECK THROTTLE CONTROL MOTOR OUTPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Disconnect electric throttle control actuator harness connector.
2.
Disconnect ECM harness connector.
3.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
4.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning part.
2.
CHECK THROTTLE CONTROL MOTOR
EC-465, "Component Inspection (Electric Throttle Control Motor)"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 4.
3.
CHECK INTERMITTENT INCIDENT
DTC No.
Trouble diagnosis name
(Trouble diagnosis content)
DTC detecting condition
Possible cause
P2118
ETC MOT-B1
(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)
Electric throttle control actuator
ECM
Continuity
Connector
Terminal
Connector
Terminal
F66
5
F110
57
Not existed
63
Existed
6
57
Existed
63
Not existed
P2118 THROTTLE CONTROL MOTOR
EC-465
< DTC/CIRCUIT DIAGNOSIS >
[VK56VD]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
GI-40, "Intermittent Incident"
.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Repair or replace harness or connectors.
4.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Refer to
EM-30, "Removal and Installation"
>> INSPECTION END
Component Inspection (Electric Throttle Control Motor)
INFOID:0000000006217969
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 per the following.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> GO TO 2.
2.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
Replace electric throttle control actuator. Refer to
EM-30, "Removal and Installation"
>> INSPECTION END
Terminals
Resistance
5 and 6
Approx. 1 - 15
Ω
[at 25
°
C (77
°
F)]
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