Infiniti QX4 (R50). Manual — part 29
Wiring Diagram — AT — VSSA/T
NBAT0188
MAT910A
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
Wiring Diagram — AT — VSSA/T
AT-113
Diagnostic Procedure
NBAT0035
1
INSPECTION START
Do you have CONSULT-II?
Yes or No
Yes (With CONSULT-II)
©
GO TO 2.
No (Without CONSULT-
II)
©
GO TO 5.
2
CHECK INPUT SIGNAL (WITH CONSULT-II)
With CONSULT-II
1. Start engine.
2. Select “TCM INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Read out the value of “VHCL/S SE·A/T” while driving.
Check the value changes according to driving speed.
SAT614J
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 4.
3
CHECK REVOLUTION SENSOR
Refer to “Component Inspection”, AT-115.
OK or NG
OK
©
GO TO 6.
NG
©
Repair or replace revolution sensor.
4
DETECT MALFUNCTIONING ITEM
Check the following items:
I
Harness for short or open between TCM and revolution sensor (Main harness)
I
Harness for short or open between revolution sensor and ECM (Main harness)
I
Ground circuit for ECM
Refer to EC-142, “WIRING DIAGRAM”.
OK or NG
OK
©
GO TO 6.
NG
©
GO TO 3.
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
Diagnostic Procedure
AT-114
5
CHECK INPUT SIGNAL (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 29 and ground while driving.
(Measure with AC range.)
Voltage:
At 0 km/h (0 MPH):
0V
At 30 km/h (19 MPH):
1V or more
(Voltage rises gradually in response to vehicle speed.)
SAT519J
OK or NG
OK
©
GO TO 3.
NG
©
GO TO 4.
6
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-112.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 7.
7
CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK
©
INSPECTION END
NG
©
Repair or replace damaged parts.
SAT210IA
Component Inspection
NBAT0036
REVOLUTION SENSOR
NBAT0036S01
I
For removal, refer to AT-273.
I
Check resistance between terminals 1, 2 and 3.
Terminal No.
Resistance
1
2
500 - 650
Ω
2
3
No continuity
1
3
No continuity
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
Diagnostic Procedure (Cont’d)
AT-115
Description
NBAT0037
The engine speed signal is sent from the ECM to the TCM.
TCM TERMINALS AND REFERENCE VALUE
NBAT0037S02
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
39
W/B
Engine speed sig-
nal
Refer to EC-127, “ECM INSPECTION
TABLE”.
—
ON BOARD DIAGNOSIS LOGIC
NBAT0037S03
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: ENGINE SPEED SIG
TCM does not receive the proper voltage
signal from ECM.
I
Harness or connectors
(The sensor circuit is open or shorted.)
: P0725
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0037S01
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” has been previously conducted, always turn ignition
switch “OFF” and wait at least 5 seconds before conducting
the next test.
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
With CONSULT-II
1)
Turn ignition switch “ON” and select “DATA MONITOR” mode
for “ENGINE” with CONSULT-II.
2)
Start engine and maintain the following conditions for at least
10 consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD “ON”)
With GST
Follow the procedure “With CONSULT-II”.
DTC P0725 ENGINE SPEED SIGNAL
Description
AT-116
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