Infiniti M45 (Y34). Manual — part 479
DTC P1706 PNP SWITCH
EC-605
C
D
E
F
G
H
I
J
K
L
M
A
EC
10.
CHECK PNP SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT-IV
Check harness continuity between the following;
●
TCM terminal 30 and A/T assembly terminal 1
●
TCM terminal 31 and A/T assembly terminal 2
●
TCM terminal 38 and A/T assembly terminal 3
●
TCM terminal 39 and A/T assembly terminal 4
●
TCM terminal 47 and A/T assembly terminal 5
OK or NG
OK
>> GO TO 11.
NG
>> Repair open circuit or short to ground or short to power in harness or connectors.
11.
CHECK FUSE BLOCK (J/B) NO. 1
Refer to
PG-62, "FUSE BLOCK - JUNCTION BOX (J/B) NO.1"
.
OK or NG
OK
>> GO TO 12.
NG
>> Replace fuse block (J/B) No. 1.
12.
CHECK INTERMITTENT INCIDENT
Refer to
EC-132, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"
>> INSPECTION END
EC-606
DTC P1720 VEHICLE SPEED SENSOR (A/T OUTPUT)
DTC P1720 VEHICLE SPEED SENSOR (A/T OUTPUT)
PFP:31036
Description
ABS002S4
NOTE:
If DTC P1720 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
EC-143, "DTC U1000, U1001 CAN COMMUNICATION LINE"
ECM receives two vehicle speed sensor signals via CAN communication line. One is sent from VDC/TCS/ABS
control unit, and the other is from TCM (Transmission control module). ECM uses these two signals for engine
control.
CONSULT-II Reference Value in Data Monitor Mode
ABS002S5
Specification data are reference values.
On Board Diagnosis Logic
ABS002S6
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure
ABS002S8
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-II
1.
Turn ignition switch ON.
2.
Select “DATA MONITOR” mode with CONSULT-II.
3.
Start engine.
4.
Drive vehicle at a speed of 20 km/h (12 MPH) or more for at least 5 seconds without brake pedal depress-
ing.
5.
If 1st trip DTC is detected, go to
EC-607, "Diagnostic Procedure"
.
WITH GST
Follow the procedure WITH CONSULT-II above.
MONITOR ITEM
CONDITION
SPECIFICATION
VHCL SPEED SE
●
Turn drive wheels and compare the CONSULT-II value with speedometer
indication.
Almost the same speed as the
speedometer indication
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1720
1720
Vehicle speed sensor
(A/T output)
ECM detects a difference between two
vehicle speed sensor signals is out of the
specified range.
●
Harness or connectors
(The CAN communication line is open or
shorted)
●
Harness or connectors
(Revolution sensor circuit is open or shorted)
●
Harness or connectors
(Wheel sensor circuit is open or shorted.)
●
TCM (Transmission control module)
●
VDC/TCS/ABS control unit
●
Combination meter
DTC P1720 VEHICLE SPEED SENSOR (A/T OUTPUT)
EC-607
C
D
E
F
G
H
I
J
K
L
M
A
EC
Diagnostic Procedure
ABS002S9
1.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Perform trouble shooting relevant to DTC indicated.
2.
CHECK DTC WITH VDC/TCS/ABS CONTROL UNIT
Check DTC with VDC/TCS/ABS control unit. Refer to
.
OK or NG
OK
>> GO TO 3.
NG
>> Perform trouble shooting relevant to DTC indicated.
3.
CHECK COMBINATION METER
Check combination meter function. Refer to
>> INSPECTION END
EC-608
DTC P1780 SHIFT CHANGE SIGNAL
DTC P1780 SHIFT CHANGE SIGNAL
PFP:31036
Description
ABS002SA
NOTE:
If DTC P1780 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to
EC-143, "DTC U1000, U1001 CAN COMMUNICATION LINE"
ECM receives current gear position signal, next gear position signal, shift change signal, shift pattern signal
through CAN communication line from TCM (Transmission control module). ECM uses these four signals for
engine control.
On Board Diagnosis Logic
ABS002SB
The MIL will not light up for this diagnosis.
DTC Confirmation Procedure
ABS002SD
CAUTION:
Always drive vehicle at a safe speed.
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.
WITH CONSULT-II
1.
Perform DTC confirmation procedure for DTC P1754, refer to
AT-185, "DTC Confirmation Procedure"
2.
If 1st trip DTC is detected, go to
AT-187, "Diagnostic Procedure"
WITH GST
Follow the procedure WITH CONSULT-II above.
Diagnostic Procedure
ABS002SE
1.
CHECK DTC WITH TCM
Check DTC with TCM. Refer to
OK or NG
OK
>> GO TO 2.
NG
>> Perform trouble shooting relevant to DTC indicated.
2.
CHECK TCM FUNCTION
Refer to
OK or NG
OK
>> GO TO 3.
NG
DTC No.
Trouble diagnosis name
DTC detecting condition
Possible cause
P1780
1780
Shift change signal
A)
The next gear position signal and the current gear
position signal are not in the normal pattern com-
pared with the shift pattern signal,
●
Harness or connectors
(CAN communication line circuit
is open or shorted)
●
TCM (Transmission control mod-
ule)
●
A/T unit assembly
B)
The next gear position signal and the current gear
position signal are different even through the shift
change signal is OFF.
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