Infiniti M45 (Y34). Manual — part 428
DTC P0506 ISC SYSTEM
EC-401
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A
EC
DTC P0506 ISC SYSTEM
PFP:23781
Description
ABS002LU
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
ABS002LV
DTC Confirmation Procedure
ABS002LW
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-44, "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-402, "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 system
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
EC-402
DTC P0506 ISC SYSTEM
Diagnostic Procedure
ABS002LX
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-174, "ECM Re-Communicating Function"
4.
Perform
EC-44, "Accelerator Pedal Released Position Learning"
.
5.
Perform
EC-44, "Throttle Valve Closed Position Learning"
6.
Perform
EC-44, "Idle Air Volume Learning"
>> INSPECTION END
DTC P0507 ISC SYSTEM
EC-403
C
D
E
F
G
H
I
J
K
L
M
A
EC
DTC P0507 ISC SYSTEM
PFP:23781
Description
ABS002LY
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
ABS002LZ
DTC Confirmation Procedure
ABS002M0
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-44, "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-404, "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 system
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
EC-404
DTC P0507 ISC SYSTEM
Diagnostic Procedure
ABS002M1
1.
CHECK PCV HOSE CONNECTION
Confirm that PCV hose is connected correctly.
OK or NG
OK
>> GO TO 2.
NG
>> Repair or replace.
2.
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 3.
NG
>> Discover air leak location and repair.
3.
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-174, "ECM Re-Communicating Function"
4.
Perform
EC-44, "Accelerator Pedal Released Position Learning"
.
5.
Perform
EC-44, "Throttle Valve Closed Position Learning"
6.
Perform
EC-44, "Idle Air Volume Learning"
>> INSPECTION END
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