Nissan Qashqai (2007-2010). Manual — part 342
P1574 ASCD VEHICLE SPEED SENSOR
EC-887
< COMPONENT DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1574 ASCD VEHICLE SPEED SENSOR
Description
INFOID:0000000001089473
The ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from combina-
tion meter, and the other is from TCM (Transmission control module). The ECM uses these signals for ASCD
control. Refer to
DTC Logic
INFOID:0000000001089474
DTC DETECTION LOGIC
NOTE:
• If DTC P1574 is displayed with DTC U1001, first perform the trouble diagnosis for DTC U1001. Refer
.
• If DTC P1574 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer
.
• If DTC P1574 is displayed with DTC P0500, first perform the trouble diagnosis for DTC P0500. Refer
• If DTC P1574 is displayed with DTC P0605, first perform the trouble diagnosis for DTC P0605. Refer
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.
Start engine.
2.
Drive the vehicle at more than 40 km/h (25 MPH).
CAUTION:
Always drive vehicle at a safe speed.
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.
3.
Check DTC.
Is DTC detected?
YES
>> Go to
NO
>> INSPECTION END
Diagnosis Procedure
INFOID:0000000001089475
1.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
TM-214, "Diagnosis Description"
Is the inspection result normal?
YES
>> GO TO 2.
DTC No.
Trouble diagnosis
name
DTC detecting condition
Possible cause
P1574
ASCD vehicle speed
sensor
ECM detects a difference between two vehicle
speed signals is out of the specified range.
• Harness or connectors
(The CAN communication line is open or
shorted.)
(Combination meter circuit is open or shorted.)
• Combination meter
• ABS actuator and electric unit (control unit)
• Wheel sensor
• TCM (CVT models)
• ECM
EC-888
< COMPONENT DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
P1574 ASCD VEHICLE SPEED SENSOR
NO
>> Perform trouble shooting relevant to DTC indicated.
2.
CHECK DTC WITH “ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)”
BRC-17, "CONSULT-III Function (ABS)"
.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace.
3.
CHECK COMBINATION METER
Check combination meter function.
Refer to
MWI-23, "CONSULT-III Function (METER/M&A)"
.
>> INSPECTION END
P1706 PNP SWITCH
EC-889
< COMPONENT DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
P1706 PNP SWITCH
Description
INFOID:0000000001089476
When the shift lever position is P or N (CVT), Neutral position (M/T), park/neutral position (PNP) switch is ON.
ECM detects the position because the continuity of the line (the ON signal) exists.
DTC Logic
INFOID:0000000001089477
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.
INSPECTION START
Do you have CONSULT-III?
Do you have CONSULT-III?
YES
>> GO TO 2.
NO
>> GO TO 5.
2.
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 3.
3.
CHECK PNP SWITCH FUNCTION
With CONSULT-III
1.
Turn ignition switch ON.
2.
Select “P/N POSI SW” in “DATA MONITOR” mode with CONSULT-III. Then check the “P/N POSI SW” sig-
nal under the following conditions.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Go to
4.
PERFORM DTC CONFIRMATION PROCEDURE
1.
Select “DATA MONITOR” mode with CONSULT-III.
2.
Start engine and warm it up to normal operating temperature.
3.
Maintain the following conditions for at least 50 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1706
Park/neutral position
switch
The signal of the park/neutral position (PNP)
switch is not changed in the process of engine
starting and driving.
• Harness or connectors
[The park/neutral position (PNP) switch
circuit is open or shorted.]
• Park/neutral position (PNP) switch
Position (Shift lever)
Known-good signal
N or P position (CVT)
Neutral position (M/T)
ON
Except above position
OFF
ENG SPEED
CVT: 1,500 - 6,375 rpm
M/T: 1,500 - 6,375 rpm
COOLAN TEMP/S
More than 70
°
C (158
°
F)
EC-890
< COMPONENT DIAGNOSIS >
[MR20DE (WITH EURO-OBD)]
P1706 PNP SWITCH
4.
Check 1st trip DTC.
Is 1st trip DTC detected?
YES
>> Go to
NO
>> INSPECTION END
5.
PERFORM COMPONENT FUNCTION CHECK
Perform component function check. Refer to
EC-893, "Component Function Check"
NOTE:
Use component function check the overall function of the park/neutral position (PNP) switch circuit. During this
check, a 1st trip DTC might not be confirmed.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Component Function Check
INFOID:0000000001089478
1.
PERFORM COMPONENT FUNCTION CHECK
1.
Turn ignition switch ON.
2.
Check the voltage between ECM harness connector and ground.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Go to
Diagnosis Procedure
INFOID:0000000001089479
1.
CHECK PNP SWITCH POWER SUPPLY CIRCUIT
1.
Turn ignition switch OFF.
2.
Disconnect Park/neutral position (PNP) switch harness connector.
3.
Turn ignition switch ON.
4.
Check the voltage between PNP switch harness connector and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> GO TO 2.
2.
DTECTED MALFUNCTIONING PART
Check the following.
• Harness connectors E6, F123
B/FUEL SCHDL
CVT: 2.4 - 31.8 msec
M/T: 3.5 - 31.8 msec
VHCL SPEED SE
More than 64 km/h (40 mph)
Shift lever
Suitable position
ECM
Ground
Condition
Voltage
Connector
Terminal
F8
69
(PNP switch signal)
Ground
Shift lever
P or N (CVT)
Neutral (M/T)
Approx. 0V
Except above
BATTERY VOLTAGE
PNP switch
Ground
Voltage
Connector
Terminal
F21 (CVT)
7
Ground
Battery voltage
F46 (M/T 2W)
2
F48 (M/T 4W)
2
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