Infiniti QX4 (R50). Manual — part 28
4
CHECK A/T FLUID TEMPERATURE SENSOR WITH TERMINAL CORD ASSEMBLY
1. Turn ignition switch to “OFF” position.
2. Disconnect terminal cord assembly connector on the right side of transfer assmebly.
3. Check resistance between terminals 8 and 9 when A/T is cold [20°C (68°F)].
SAT697I
Is resistance approx. 2.5 k
Ω
?
Yes
©
GO TO 7.
No
©
GO TO 5.
5
DETECT MALFUNCTIONING ITEM
1. Remove oil pan.
2. Check the following items:
I
A/T fluid temperature sensor
Refer to “Component Inspection”, AT-110.
I
Harness of terminal cord assembly for short or open
OK or NG
OK
©
GO TO 7.
NG
©
Repair or replace damaged parts.
6
CHECK INPUT SIGNAL OF A/T FLUID TEMPERATURE SENSOR (WITHOUT CONSULT-II)
Without CONSULT-II
1. Start engine.
2. Check voltage between TCM terminal 47 and ground while warming up A/T.
Voltage:
Cold [20°C (68°F)]
→
Hot [80°C (176°F)]:
Approximately 1.5V
→
0.5V
SAT518J
OK or NG
OK
©
GO TO 4.
NG
©
GO TO 3.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
Diagnostic Procedure (Cont’d)
AT-109
7
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-106.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 8.
8
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.
SAT687I
Component Inspection
NBAT0033
A/T FLUID TEMPERATURE SENSOR
NBAT0033S01
I
For removal, refer to AT-273.
I
Check resistance between terminals 8 and 9 while changing
temperature as shown at left.
Temperature °C (°F)
Resistance
20 (68)
Approximately 2.5 k
Ω
80 (176)
Approximately 0.3 k
Ω
DTC P0710 A/T FLUID TEMPERATURE SENSOR CIRCUIT
Diagnostic Procedure (Cont’d)
AT-110
SAT136K
Description
NBAT0034
The revolution sensor detects the revolution of the out put shaft
parking pawl lock gear and emits a pulse signal. The pulse signal
is sent to the TCM which converts it into vehicle speed.
TCM TERMINALS AND REFERENCE VALUE
NBAT0034S02
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
29
W
Revolution sensor
(Measure in AC
range)
When vehicle cruises at 30 km/h (19 MPH).
1V or more
Voltage rises
gradually in
response to
vehicle speed.
When vehicle parks.
0V
42
B
Throttle position
sensor
(Ground)
—
0V
ON BOARD DIAGNOSIS LOGIC
NBAT0034S03
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: VEH SPD SEN/CIR AT
TCM does not receive the proper voltage
signal from the sensor.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Revolution sensor
: P0720
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)
Description
AT-111
SAT014K
SAT971J
SAT014K
SAT020K
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0034S01
CAUTION:
I
Always drive vehicle at a safe speed.
I
Be careful not to rev engine into the red zone on the
tachometer.
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 “A/T” with CONSULT-II.
2)
Drive vehicle and check for an increase of “VHCL/S SE·MTR”
value.
If the check result is NG, go to “DIAGNOSTIC PROCEDURE”,
AT-200.
If the check result is OK, go to following step.
3)
Select “DATA MONITOR” mode for “ENGINE” with CONSULT-
II.
4)
Start engine and maintain the following conditions for at least
5 consecutive seconds.
VHCL SPEED SE: 30 km/h (19 MPH) or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD “ON”)
Driving pattern: Driving the vehicle uphill (increased engine
load) will help maintain the driving conditions required for this
test.
If the check result is NG, go to “DIAGNOSTIC PROCEDURE”,
AT-114.
If the check result is OK, go to following step.
5)
Maintain the following conditions for at least 5 consecutive
seconds.
CMPS·RPM (REF): 3,500 rpm or more
THRTL POS SEN: More than 1.2V
Selector lever: D position (OD “ON”)
Driving pattern: Driving the vehicle uphill (increased engine
load) will help maintain the driving conditions required for this
test.
With GST
Follow the procedure “With CONSULT-II”.
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
Description (Cont’d)
AT-112
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст