Infiniti FX35, FX50 (S51). Manual — part 712
P1238, P2119 ELECTRIC THROTTLE CONTROL ACTUATOR
EC-389
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
3.
Shift selector lever position to P.
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:0000000005236990
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-389, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000005236991
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-25, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-25, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
JMBIA1511ZZ
EC-390
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P1239, P2135 TP SENSOR
P1239, P2135 TP SENSOR
Description
INFOID:0000000005236992
Electric throttle control actuator consists of throttle control motor,
throttle position (TP) sensor, etc. The throttle position sensor
responds to the throttle valve movement.
The throttle position sensor has two sensors. These sensors are a
kind of potentiometers which transform the throttle valve position into
output voltage, and emit the voltage signal to the ECM. In addition,
these sensors detect the opening and closing speed of the throttle
valve and feed 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:0000000005236993
DTC DETECTION LOGIC
NOTE:
If DTC P1239 or P2135 is displayed with DTC P0643, first perform the trouble diagnosis for DTC P0643.
Refer to
.
DTC CONFIRMATION PROCEDURE
1.
PRECONDITIONING
If DTC Confirmation Procedure has been previously conducted, always perform the following procedure
before conducting 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.
TESTING CONDITION:
Before performing the following procedure, confirm that battery voltage is more than 10 V at idle.
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Start engine and let it idle for 1 second.
2.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000005236994
1.
CHECK GROUND CONNECTION
1.
Turn ignition switch OFF.
2.
Check ground connection M95. Refer to Ground Inspection in
Is the inspection result normal?
YES
>> GO TO 2.
PBIB0145E
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1239
Throttle position (TP)
sensor (bank 2) circuit
range/performance
Rationally incorrect voltage is sent to ECM
compared with the signals from TP sensor 1
and TP sensor 2.
• Harness or connector
(TP sensor 1 and 2 circuit is open or
shorted.)
• Electric throttle control actuator
(TP sensor 1 and 2)
P2135
Throttle position (TP)
sensor (bank 1) circuit
range/performance
P1239, P2135 TP SENSOR
EC-391
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
NO
>> Repair or replace ground connection.
2.
CHECK THROTTLE POSITION SENSOR POWER SUPPLY CIRCUIT
1.
Disconnect electric throttle control actuator harness connector.
2.
Turn ignition switch ON.
3.
Check the voltage between electric throttle control actuator harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
3.
CHECK THROTTLE POSITION SENSOR GROUND CIRCUIT FOR OPEN AND SHORT
1.
Turn ignition switch OFF.
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 4.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
4.
CHECK THROTTLE POSITION SENSOR INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT
1.
Check the continuity between electric throttle control actuator harness connector and ECM harness con-
nector.
2.
Also check harness for short to ground and short to power.
Is the inspection result normal?
YES
>> GO TO 5.
NO
>> Repair open circuit, short to ground or short to power in harness or connectors.
5.
CHECK THROTTLE POSITION SENSOR
EC-392, "Component Inspection"
Is the inspection result normal?
YES
>> GO TO 7.
NO
>> GO TO 6.
6.
REPLACE ELECTRIC THROTTLE CONTROL ACTUATOR
1.
Replace malfunctioning electric throttle control actuator.
DTC
Electric throttle control actuator
Ground
Voltage (V)
Bank
Connector
Terminal
P1239
2
F27
1
Ground
Approx. 5
P2135
1
F6
6
DTC
Electric throttle control actuator
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1239
2
F27
4
F101
48
Existed
P2135
1
F6
3
40
DTC
Electric throttle control actuator
ECM
Continuity
Bank
Connector
Terminal
Connector
Terminal
P1239
2
F27
2
F101
31
Existed
3
35
P2135
1
F6
4
30
5
34
EC-392
< DTC/CIRCUIT DIAGNOSIS >
[VQ35HR]
P1239, P2135 TP SENSOR
2.
EC-392, "Special Repair Requirement"
>> INSPECTION END
7.
CHECK INTERMITTENT INCIDENT
GI-36, "Intermittent Incident"
>> INSPECTION END
Component Inspection
INFOID:0000000005236995
1.
CHECK THROTTLE POSITION (TP) SENSOR
1.
Turn ignition switch OFF.
2.
Reconnect all harness connectors disconnected.
3.
EC-25, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
4.
Turn ignition switch ON.
5.
Set selector lever position to D.
6.
Check the voltage between ECM harness connector terminals under the following conditions.
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-392, "Special Repair Requirement"
.
>> INSPECTION END
Special Repair Requirement
INFOID:0000000005236996
1.
PERFORM THROTTLE VALVE CLOSED POSITION LEARNING
EC-25, "THROTTLE VALVE CLOSED POSITION LEARNING : Special Repair Requirement"
>> GO TO 2.
2.
PERFORM IDLE AIR VOLUME LEARNING
EC-25, "IDLE AIR VOLUME LEARNING : Special Repair Requirement"
>> END
ECM
Condition
Voltage (V)
Connector
+
–
Terminal
Terminal
F101
30
[TP sensor 1 (bank 1)]
40
Accelerator pedal: Fully released
More than 0.36
Accelerator pedal: Fully depressed
Less than 4.75
31
[TP sensor 1 (bank 2)]
48
Accelerator pedal: Fully released
More than 0.36
Accelerator pedal: Fully depressed
Less than 4.75
34
[TP sensor 2 (bank 1)]
40
Accelerator pedal: Fully released
Less than 4.75
Accelerator pedal: Fully depressed
More than 0.36
35
[TP sensor 2 (bank 2)]
48
Accelerator pedal: Fully released
Less than 4.75
Accelerator pedal: Fully depressed
More than 0.36
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