Nissan Altima L32. Instruction — part 561
P0500 VSS
EC-1365
< COMPONENT DIAGNOSIS >
[VQ35DE]
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P0500 VSS
Description
INFOID:0000000004362202
The vehicle speed signal is sent to the combination meter from the “ABS actuator and electric unit (control
unit)” via the CAN communication line. The combination meter then sends a signal to the ECM via the CAN
communication line.
DTC Logic
INFOID:0000000004362203
DTC DETECTION LOGIC
NOTE:
• If DTC P0500 is displayed with DTC UXXXX, first perform the trouble diagnosis for DTC UXXXX.
Refer to
• If DTC P0500 is displayed with DTC P0607, first perform the trouble diagnosis for DTC P0607. Refer
.
DTC CONFIRMATION PROCEDURE
1.
INSPECTION START
Will CONSULT-III be used?
Will CONSULT-III be used?
YES
>> GO TO 2.
NO
>> GO TO 5.
2.
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 3.
3.
CHECK VEHICLE SPEED SIGNAL
NOTE:
This procedure may be conducted with the drive wheels lifted in the shop or by driving the vehicle. If a
road test is expected to be easier, it is unnecessary to lift the vehicle.
With CONSULT-III
1. Start engine (ESP switch OFF).
2. Read “VHCL SPEED SE” in “DATA MONITOR” mode with CONSULT-III. The vehicle speed on CON-
SULT-III should exceed 10 km/h (6 MPH) when rotating wheels with suitable gear position.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Go to
EC-1366, "Diagnosis Procedure"
4.
PERFORM DTC CONFIRMATION PROCEDURE
1. Select “DATA MONITOR” mode with CONSULT-III.
2. Warm engine up to normal operating temperature.
3. Maintain the following conditions for at least 50 consecutive seconds.
DTC No. Trouble diagnosis name
DTC detecting condition
Possible cause
P0500
Vehicle speed sensor
The vehicle speed signal sent to ECM
is almost 0 km/h (0 MPH) even when
vehicle is being driven.
• Harness or connectors
(The CAN communication line is open or shorted.)
• Harness or connectors
(The vehicle speed signal circuit is open or shorted.)
• Wheel sensor
• Combination meter
• ABS actuator and electric unit (control unit)
EC-1366
< COMPONENT DIAGNOSIS >
[VQ35DE]
P0500 VSS
CAUTION:
Always drive vehicle at a safe speed.
4. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
EC-1366, "Diagnosis Procedure"
NO
>> INSPECTION END
5.
PERFORM COMPONENT FUNCTION CHECK
Perform Component Function Check. Refer to
EC-1366, "Component Function Check"
.
Use component function check to check the overall function of the vehicle speed signal circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
EC-1366, "Diagnosis Procedure"
Component Function Check
INFOID:0000000004362204
1.
PERFORM COMPONENT FUNCTION CHECK
With GST
1. Lift up drive wheels.
2. Start engine.
3. Read vehicle speed signal in Service $01 with GST.
The vehicle speed signal on GST should be able to exceed 10 km/h (6 MPH) when rotating wheels with
suitable gear position.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
EC-1366, "Diagnosis Procedure"
Diagnosis Procedure
INFOID:0000000004362205
1.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
BRC-12, "CONSULT-III Function (ABS)"
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace malfunctioning part.
2.
CHECK COMBINATION METER FUNCTION
MWI-38, "CONSULT-III Function (METER/M&A)"
.
>> INSPECTION END
ENG SPEED
1,600 - 6,000 rpm
COOLAN TEMP/S
More than 70
°C (158°F)
B/FUEL SCHDL
5.5 - 31.8 msec
Selector lever
Except P or N position (CVT)
Except Neutral position (M/T)
PW/ST SIGNAL
OFF
P0506 ISC SYSTEM
EC-1367
< COMPONENT DIAGNOSIS >
[VQ35DE]
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P0506 ISC SYSTEM
Description
INFOID:0000000004362206
The ECM controls the engine idle speed to a specified level via 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 var-
ied 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.).
DTC Logic
INFOID:0000000004362207
DTC DETECTION LOGIC
NOTE:
If DTC P0506 is displayed with other DTC, first perform the trouble diagnosis for the other DTC.
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.
If the target idle speed is out of the specified value, perform
EC-1053, "IDLE AIR VOLUME LEARNING :
, before conducting DTC CONFIRMATION PROCEDURE.
TESTING CONDITION:
• Before performing the following procedure, confirm that battery voltage is more than 11 V at idle.
• Always perform the test at a temperature above
−10°C(14°F).
>> GO TO 2.
2.
PERFORM DTC CONFIRMATION PROCEDURE
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch OFF and wait at least 10 seconds.
3. Turn ignition switch ON.
4. Turn ignition switch OFF and wait at least 10 seconds.
5. Restart engine and run it for at least 1 minute at idle speed.
6. Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
EC-1367, "Diagnosis Procedure"
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000004362208
1.
CHECK INTAKE AIR LEAKAGE
1. Start engine and let it idle.
2. Listen for an intake air leakage after the mass air flow sensor.
Is intake air leakage detected?
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P0506
Idle speed control sys-
tem RPM lower than ex-
pected
The idle speed is less than the target idle speed
by 100 rpm or more.
• Electric throttle control actuator
• Intake air leakage
EC-1368
< COMPONENT DIAGNOSIS >
[VQ35DE]
P0506 ISC SYSTEM
YES
>> Discover air leakage location and repair.
NO
>> GO TO 2.
2.
REPLACE ECM
1. Stop engine.
2. Replace ECM.
3. Go to
EC-1051, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Require-
>> INSPECTION END
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