Nissan Frontier D22. Instruction — part 74
DTC P0720 VEHICLE SPEED SENSOR·A/T (REVOLUTION SENSOR)
AT-265
[RE4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
3.
CHECK DTC
Perform Diagnostic Trouble Code (DTC) confirmation procedure. Refer to
CODE (DTC) CONFIRMATION PROCEDURE"
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 connector.
Component Inspection
ECS007MF
REVOLUTION SENSOR
●
For removal, refer to
.
●
Check resistance between terminals 1 and 2.
Terminal No.
Resistance
1
2
500 - 650
Ω
AAT487A
AT-266
[RE4R01A]
DTC P0725 ENGINE SPEED SIGNAL
DTC P0725 ENGINE SPEED SIGNAL
PFP:24825
Description
ECS007MG
The engine speed signal is sent from the ECM to the TCM.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSIS LOGIC
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DIAGNOSTIC TROUBLE CODE CONFIRMATION PROCE-
DURE” 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 mal-
function is eliminated.
With CONSULT-II
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
●
Follow the procedure “With CONSULT-II”.
Terminal
No.
Wire color
Item
Condition
Judgement stan-
dard (Approx.)
39
P/L
Engine speed
signal
When engine runs at idle speed.
0.5 - 2.5V
Diagnostic trouble code
Malfunction is detected when ...
Check item (Possible cause)
: ENGINE SPEED SIG
TCM does not receive the proper voltage
signal from ECM.
●
Harness or connectors
(The sensor circuit is open or shorted)
: P0725
SAT014K
SEF949Y
DTC P0725 ENGINE SPEED SIGNAL
AT-267
[RE4R01A]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Wiring Diagram — AT — ENGSS
ECS007MH
WCWA0149E
AT-268
[RE4R01A]
DTC P0725 ENGINE SPEED SIGNAL
Diagnostic Procedure
ECS007MI
1.
CHECK DTC WITH ECM
Perform diagnostic test mode II (self-diagnostic results) for engine control. Check ignition signal circuit condi-
tion.
OK or NG
OK
>> GO TO 2.
NG
>> Check ignition signal circuit for engine control. Refer to
(VG33E only) or
(VG33ER only), “IGNITION SIGNAL”.
2.
CHECK INPUT SIGNAL
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.
Without CONSULT-II
1.
Start engine.
2.
Check voltage between TCM harness connector M78 terminal 39 and ground.
Does battery voltage (idle speed) 0.5 - 2.5V?
Yes
>> GO TO 3.
No
>> Check the following items:
●
Harness for short or open between TCM connector M78 and ECM connector F29
●
Resistor
●
(VG33E only) or
(VG33ER only), “IGNITION SIGNAL”.
SAT645J
AAT488A
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