Infiniti QX4 (R50). Manual — part 51
4
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.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC VEHICLE SPEED SENSOR·MTR
Diagnostic Procedure (Cont’d)
AT-201
SAT136K
Description
NBAT0224
The turbine revolution sensor detects input shaft rpm (revolutions
per minute). It is located on the input side of the automatic trans-
mission. The vehicle speed sensor A/T (Revolution sensor) is
located on the output side of the automatic transmission. With the
two sensors, input and output shaft rpms are accurately detected.
The result is optimal shift timing during deceleration and improved
shifting.
TCM TERMINALS AND REFERENCE VALUE
NBAT0224S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
38
W
Turbine revolution
sensor
(Measure in AC
range)
When engine is running at 1,000 rpm
1.2V
Voltage rises
gradually in
response to
engine speed.
42
B
Throttle position
sensor (Ground)
—
0V
ON BOARD DIAGNOSIS LOGIC
NBAT0224S02
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: TURBINE REV
TCM does not receive the proper voltage
signal from the sensor.
I
Harness or connectors
(The sensor circuit is open or shorted.)
I
Turbine revolution sensor
: 10th judgement flicker
DTC TURBINE REVOLUTION SENSOR
Description
AT-202
SAT014K
SAT971J
SAT635I
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION
PROCEDURE
NBAT0224S03
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)
Start engine.
2)
Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
3)
Drive vehicle under the following conditions:
Selector lever in “D”, vehicle speed higher than 40 km/h (25
MPH), engine speed higher than 1,500 rpm, throttle opening
greater than 1.0/8 of the full throttle position and driving for
more than 5 seconds.
No Tools
1)
Start engine.
2)
Drive vehicle under the following conditions:
Selector lever in “D”, vehicle speed higher than 40 km/h (25
MPH), engine speed higher than 1,500 rpm, throttle opening
greater than 1/8 of the full throttle position and driving for more
than 5 seconds.
3)
Perform self-diagnosis.
Refer to TCM SELF-DIAGNOSTIC PROCEDURE (No Tools),
AT-46.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC TURBINE REVOLUTION SENSOR
Description (Cont’d)
AT-203
Wiring Diagram — AT — TRSA/T
NBAT0225
MAT923A
DTC TURBINE REVOLUTION SENSOR
Wiring Diagram — AT — TRSA/T
AT-204
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