Nissan Silvia. Instruction — part 23
SAT338HC
Description
NMAT0034
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
NMAT0034S02
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
G/Y
Throttle position
sensor
(Ground)
—
0V
ON BOARD DIAGNOSIS LOGIC
NMAT0034S03
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: VHCL SPEED SEN·A/T
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
: 1st judgement flicker
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN·A/T (REVOLUTION SENSOR)
Description
AT-89
SAT014K
SAT806H
SELF-DIAGNOSIS CODE CONFIRMATION PROCEDURE
NMAT0034S04
After the repair, perform the following procedure to confirm the
malfunction is eliminated.
WITH CONSULT-II
NMAT0034S05
1)
Start engine.
2)
Select “SELF-DIAG RESULTS” mode for “A/T” with CON-
SULT-II.
3)
Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than 30
km/h (19 MPH), throttle opening greater than 1/8 of the full
throttle position and driving for more than 5 seconds.
WITHOUT CONSULT-II
NMAT0034S06
1)
Start engine.
2)
Drive vehicle under the following conditions:
Selector lever in “D” position, vehicle speed higher than 30
km/h (19 MPH), throttle opening greater than 1/8 of the full
throttle position and driving for more than 5 seconds.
3)
Perform self-diagnosis.
Refer
to
SELF-DIAGNOSTIC
PROCEDURE
(Without
CONSULT-II), AT-37.
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN·A/T (REVOLUTION SENSOR)
Description (Cont’d)
AT-90
Wiring Diagram — AT — VSSA/T
NMAT0188
TAT255
GI
MA
EM
LC
EC
FE
CL
MT
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN·A/T (REVOLUTION SENSOR)
Wiring Diagram — AT — VSSA/T
AT-91
Diagnostic Procedure
NMAT0035
1
CHECK REVOLUTION SENSOR
Refer to “Component Inspection”, AT-93.
OK or NG
OK (With CONSULT-II)
©
GO TO 2.
OK (Without CONSULT-
II)
©
GO TO 3.
NG
©
Repair or replace revolution sensor.
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 4.
NG
©
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-83, “Wiring Diagram”.
TROUBLE DIAGNOSIS FOR VHCL SPEED SEN·A/T (REVOLUTION SENSOR)
Diagnostic Procedure
AT-92
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