Nissan Almera Tino V10. Instruction — part 102
AT-132
[EURO-OBD]
DTC P0725 ENGINE SPEED SIGNAL
Wiring Diagram — AT — ENGSS
ECS0097N
YAT372A
DTC P0725 ENGINE SPEED SIGNAL
AT-133
[EURO-OBD]
D
E
F
G
H
I
J
K
L
M
A
B
AT
Diagnostic Procedure
ECS0097O
1.
CHECK DTC WITH ECM
Perform “Overall function check” for ignition signal. Refer to
EC-518, "Diagnostic Procedure"
.
OK or NG
OK (With CONSULT-II)>>GO TO 2
OK (Without CONSULT-II)>>GO TO 3
NG
>> Follow the construction of
EC-518, "Diagnostic Procedure"
.
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.
OK or NG
OK
>> GO TO 4
NG
>> Check the following items:
●
Harness for short or open between TCM and ECM
●
Resistor and ignition coil Refer to
.
3.
CHECK INPUT SIGNAL (WITHOUT CONSULT-II)
Without CONSULT-II
1.
Start engine.
2.
Check voltage between TCM terminal 39 and ground.
OK or NG
OK
>> GO TO 4
NG
>> Check the following items:
●
Harness for short or open between TCM and ECM
●
Resistor and ignition coil
.
SAT014K
SAT645J
Voltage (Idle speed):
Refer to
.
SCIA0740E
AT-134
[EURO-OBD]
DTC P0725 ENGINE SPEED SIGNAL
4.
CHECK DTC
Perform
AT-131, "DIAGNOSTIC TROUBLE 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.
DTC P0731 A/T 1ST GEAR FUNCTION
AT-135
[EURO-OBD]
D
E
F
G
H
I
J
K
L
M
A
B
AT
DTC P0731 A/T 1ST GEAR FUNCTION
PFP:31940
Description
ECS0097P
●
This is an OBD-II self-diagnostic item and not available in TCM self-diagnosis.
●
This malfunction will not be detected while the O/D OFF indicator lamp is indicating another self-diagnosis
malfunction.
●
This malfunction is detected when the A/T does not shift into first gear position as instructed by the TCM.
This is not caused by electrical malfunction (circuits open or shorted) but by mechanical malfunction such
as control valve sticking, improper solenoid valve operation, etc.
TCM TERMINALS AND REFERENCE VALUE
Remarks: Specification data are reference values.
ON BOARD DIAGNOSTIC LOGIC
This diagnosis monitors actual gear position by checking the torque converter slip ratio calculated by TCM as
follows:
Torque converter slip ratio = A x C/B
A: Output shaft revolution signal from revolution sensor
B: Engine speed signal from ECM
C: Gear ratio determined as gear position which TCM supposes
If the actual gear position is higher than the position (1st) supposed by TCM, the slip ratio will be more than
normal. In case the ratio exceeds the specified value, TCM judges this diagnosis malfunction.
This malfunction will be caused when either shift solenoid valve A is stuck open or shift solenoid valve B is
stuck open.
*: P0731 is detected.
Gear position
1
2
3
4
Shift solenoid valve A
ON (Closed)
OFF (Open)
OFF (Open)
ON (Closed)
Shift solenoid valve B
ON (Closed)
ON (Closed)
OFF (Open)
OFF (Open)
Termi-
nal No.
Wire color
Item
Condition
Judgement stan-
dard
(Approx.)
11
L/W
Shift solenoid
valve A
When shift solenoid valve A oper-
ates.
(When driving in “D
1
” or “D
4
”.)
Battery voltage
When shift solenoid valve A does not
operate.
(When driving in “D
2
” or “D
3
”.)
0V
12
L/Y
Shift solenoid
valve B
When shift solenoid valve B oper-
ates.
(When driving in “D
1
” or “D
2
”.)
Battery voltage
When shift solenoid valve B does not
operate.
(When driving in “D
3
” or “D
4
”.)
0V
Gear position supposed by TCM
1
2
3
4
In case of gear position with no malfunctions
1
2
3
4
In case of gear position with shift solenoid valve A stuck open
2*
2
3
3
In case of gear position with shift solenoid valve B stuck open
4*
3
3
4
Diagnostic trouble code
Malfunction is detected when...
Check items (Possible cause)
: A/T 1ST GR FNCTN
A/T cannot be shifted to the 1st gear posi-
tion even if electrical circuit is good.
●
Shift solenoid valve A
●
Shift solenoid valve B
●
Each clutch
●
Hydraulic control circuit
: P0731
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