Infiniti I35 (A33). Manual — part 32
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
signal
Refer to EC-137, “ECM INSPECTION TABLE”.
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-125
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 10 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
WITH GST
NHAT0212S02
Follow the procedure “With CONSULT-II”.
DTC P0725 ENGINE SPEED SIGNAL
Diagnostic Trouble Code (DTC) Confirmation Procedure
AT-126
Wiring Diagram — AT — ENGSS
NHAT0044
MAT475B
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0725 ENGINE SPEED SIGNAL
Wiring Diagram — AT — ENGSS
AT-127
Diagnostic Procedure
NHAT0045
1
CHECK DTC WITH ECM
I
Check P code with CONSULT-II “ENGINE”.
Turn ignition switch ON and select “SELF-DIAGNOSTIC RESULTS” mode for “ENGINE” with CONSULT-II.
Refer to EC-90, “MALFUNCTION Indicator Lamp (MIL)”.
OK or NG
OK (with CONSULT-II)
©
GO TO 2.
OK (without CONSULT-
II)
©
GO TO 4.
NG
©
Check ignition signal circuit for engine control. Refer to EC-685, “IGNITION SIGNAL”.
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 “ENGINE SPEED”.
Check engine speed changes according to throttle position.
SAT645J
OK or NG
OK
©
GO TO 5.
NG
©
GO TO 3.
3
DETECT MALFUNCTIONING ITEM
Check the following items:
I
Harness for short or open between TCM and ECM
I
Resistor and ignition coil
Refer to EC-685, “IGNITION SIGNAL”.
OK or NG
OK
©
GO TO 5.
NG
©
Repair or replace damaged parts.
DTC P0725 ENGINE SPEED SIGNAL
Diagnostic Procedure
AT-128
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