Infiniti M35/M45 Y50. Manual — part 499
DTC P0500 VSS
EC-469
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
5.
Maintain the following conditions for at least 50 consecutive sec-
onds.
6.
If 1st trip DTC is detected, go to
EC-469, "Diagnostic Procedure"
.
Overall Function Check
NBS0051R
Use this procedure to check the overall function of the vehicle speed sensor circuit. During this check, a 1st
trip DTC might not be confirmed.
WITH GST
1.
Lift up drive wheels.
2.
Start engine.
3.
Read vehicle speed sensor signal in Service $01 with GST.
The vehicle speed sensor on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.
4.
EC-469, "Diagnostic Procedure"
Diagnostic Procedure
NBS0051S
1.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
Refer to
.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
CHECK DTC WITH “UNIFIED METER AND A/C AMP.”
Refer to
DI-28, "UNIFIED METER AND A/C AMP"
.
>> INSPECTION END
ENG SPEED
1,600 - 6,000 rpm
COOLAN TEMP/S
More than 70
°
C (158
°
F)
B/FUEL SCHDL
5.3 - 31.8 msec
Selector lever
Except P or N position
PW/ST SIGNAL
OFF
SEF196Y
EC-470
[VQ35DE]
DTC P0506 ISC SYSTEM
DTC P0506 ISC SYSTEM
PFP:23781
Description
NBS0051T
NOTE:
If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis Logic
NBS0051U
DTC Confirmation Procedure
NBS0051V
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.
●
If the target idle speed is out of the specified value, perform
EC-86, "Idle Air Volume Learning"
,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the
"SERVICE DATA AND SPECIFICATIONS (SDS)"
TESTING CONDITION:
●
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
●
Always perform the test at a temperature above
−
10
°
C (14
°
F).
WITH CONSULT-II
1.
Open engine hood.
2.
Start engine and warm it up to normal operating temperature.
3.
Turn ignition switch OFF and wait at least 10 seconds.
4.
Turn ignition switch ON again and select “DATA MONITOR”
mode with CONSULT-II.
5.
Start engine and run it for at least 1 minute at idle speed.
6.
If 1st trip DTC is detected, go to
EC-471, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0506
0506
Idle speed control sys-
tem RPM lower than
expected
The idle speed is less than the target idle
speed by 100 rpm or more.
●
Electric throttle control actuator
●
Intake air leak
SEF174Y
DTC P0506 ISC SYSTEM
EC-471
[VQ35DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
NBS0051W
1.
CHECK INTAKE AIR LEAK
1.
Start engine and let it idle.
2.
Listen for an intake air leak after the mass air flow sensor.
OK or NG
OK
>> GO TO 2.
NG
>> Discover air leak location and repair.
2.
REPLACE ECM
1.
Stop engine.
2.
Replace ECM.
3.
Perform initialization of IVIS (NATS) system and registration of all IVIS (NATS) ignition key IDs. Refer to
BL-248, "ECM Re-Communicating Function"
4.
Perform
.
5.
Perform
EC-86, "Accelerator Pedal Released Position Learning"
6.
Perform
EC-86, "Throttle Valve Closed Position Learning"
7.
Perform
EC-86, "Idle Air Volume Learning"
>> INSPECTION END
EC-472
[VQ35DE]
DTC P0507 ISC SYSTEM
DTC P0507 ISC SYSTEM
PFP:23781
Description
NBS0051X
NOTE:
If DTC P0507 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
The ECM controls the engine idle speed to a specified level through the fine adjustment of the air, which is let
into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is
varied to allow for optimum control of the engine idling speed. The crankshaft position sensor (POS) detects
the actual engine speed and sends a signal to the ECM.
The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value
memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily.
The optimum value stored in the ECM is determined by taking into consideration various engine conditions,
such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan
operation, etc.).
On Board Diagnosis Logic
NBS0051Y
DTC Confirmation Procedure
NBS0051Z
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.
●
If the target idle speed is out of the specified value, perform
EC-86, "Idle Air Volume Learning"
,
before conducting DTC Confirmation Procedure. For the target idle speed, refer to the
"SERVICE DATA AND SPECIFICATIONS (SDS)"
TESTING CONDITION:
●
Before performing the following procedure, confirm that battery voltage is more than 11V at idle.
●
Always perform the test at a temperature above
−
10
°
C (14
°
F).
WITH CONSULT-II
1.
Open engine hood.
2.
Start engine and warm it up to normal operating temperature.
3.
Turn ignition switch OFF and wait at least 10 seconds.
4.
Turn ignition switch ON again and select “DATA MONITOR”
mode with CONSULT-II.
5.
Start engine and run it for at least 1 minute at idle speed.
6.
If 1st trip DTC is detected, go to
EC-473, "Diagnostic Procedure"
.
WITH GST
Follow the procedure “WITH CONSULT-II” above.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0507
0507
Idle speed control sys-
tem RPM higher than
expected
The idle speed is more than the target idle
speed by 200 rpm or more.
●
Electric throttle control actuator
●
Intake air leak
●
PCV system
SEF174Y
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