Infiniti I30 (A33). Manual — part 30
Diagnostic Procedure
NHAT0042
1
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 2.
2
CHECK REVOLUTION SENSOR (With CONSULT-II)
With CONSULT-II
1. Start engine.
MTBL0594
I
Harness for short or open between TCM, ECM and revolution sensor (Main harness)
OK or NG
OK
©
GO TO 3.
NG
©
Repair or replace damaged parts.
3
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure, AT-115.
OK or NG
OK
©
INSPECTION END
NG
©
GO TO 4.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
Diagnostic Procedure
AT-117
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.
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
Diagnostic Procedure (Cont’d)
AT-118
Description
NHAT0043
The engine speed signal is sent from the ECM to the TCM.
TCM TERMINALS AND REFERENCE VALUE
NHAT0043S01
Remarks: Specification data are reference values.
Terminal
No.
Wire color
Item
Condition
Judgement
standard
(Approx.)
39
W/G
Engine speed sig-
nal
When engine runs at idle speed.
0.6V
When engine runs at 3,000 rpm.
2.2V
On Board Diagnosis Logic
NHAT0210
Diagnostic trouble code ENGINE SPEED SIG with CONSULT-II or
P0725 without CONSULT-II is detected when TCM does not
receive the proper voltage signal from ECM.
Possible Cause
NHAT0211
Check harness or connectors. (The sensor circuit is open or
shorted.)
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0725 ENGINE SPEED SIGNAL
Description
AT-119
SAT014K
SEF949Y
Diagnostic Trouble Code (DTC) Confirmation
Procedure
NHAT0212
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” 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
NHAT0212S01
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 (O/D ON)
WITH GST
NHAT0212S02
Follow the procedure “With CONSULT-II”.
DTC P0725 ENGINE SPEED SIGNAL
Diagnostic Trouble Code (DTC) Confirmation Procedure
AT-120
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