Infiniti G20 (P11). Manual — part 54
4
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
SAT463J
3. Turn ignition switch to “OFF” position.
4. Disconnect TCM harness connector.
5. Check resistance between terminal 42 and ground.
Continuity should exist.
SAT464J
OK or NG
OK
©
GO TO 5.
NG
©
Check the following item:
I
Harness for short or open between TCM, ECM and terminal cord assembly (Main har-
ness)
I
Ground circuit for ECM
Refer to EC-147, “TROUBLE DIAGNOSIS FOR POWER SUPPLY”.
5
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-209.
OK or NG
OK
©
INSPECTION END
NG
©
1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness con-
nector.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
Diagnostic Procedure (Cont’d)
AT-213
SAT298F
Component Inspection
NCAT0078
A/T FLUID TEMPERATURE SENSOR
NCAT0078S01
I
For removal, refer to AT-280.
I
Check resistance between two terminals while changing tem-
perature as shown at left.
Temperature °C (°F)
Resistance
20 (68)
Approximately 2.5 k
Ω
80 (176)
Approximately 0.3 k
Ω
DTC BATT/FLUID TEMP SEN (A/T FLUID TEMP SENSOR CIRCUIT AND TCM
POWER SOURCE)
Component Inspection
AT-214
SAT801I
Description
NCAT0079
The vehicle speed sensor·MTR is built into the speedometer
assembly. The sensor functions as an auxiliary device to the revo-
lution sensor when it is malfunctioning. The TCM will then use a
signal sent from the vehicle speed sensor·MTR.
TCM TERMINALS AND REFERENCE VALUE
NCAT0079S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement stan-
dard
40
Y/G
Vehicle speed sen-
sor
When moving vehicle at 2 to 3
km/h (1 to 2 MPH) for 1 m (3 ft) or
more.
Voltage varies
between less
than 1V and
more than 4.5V
ON BOARD DIAGNOSIS LOGIC
NCAT0079S02
Diagnostic trouble code
Malfunction is detected when ...
Check items (Possible cause)
: VHCL SPEED SEN·MTR
TCM does not receive the proper voltage
signal from the sensor.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Vehicle speed sensor
: 2nd judgement flicker
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC VHCL SPEED SEN·MTR VEHICLE SPEED SENSOR·MTR
Description
AT-215
SAT014K
SAT971J
SAT329HA
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NCAT0079S03
CAUTION:
I
Always drive vehicle at a safe speed.
I
If conducting this “DTC CONFIRMATION PROCEDURE”
again, always turn ignition switch “OFF” and wait at least
5 seconds before continuing.
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)
Start engine and accelerate vehicle from 0 to 25 km/h (0 to 16
MPH).
Without CONSULT-II
1)
Start engine.
2)
Drive vehicle under the following conditions:
Selector lever in “D” and vehicle speed higher than 25 km/h (16
MPH).
3)
Perform self-diagnosis.
Refer to TCM SELF-DIAGNOSTIC PROCEDURE (No Tools),
AT-49.
DTC VHCL SPEED SEN·MTR VEHICLE SPEED SENSOR·MTR
Description (Cont’d)
AT-216
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