2003 NISSAN ALMERA N16 Electronic Repair Manual

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Page 1585 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0725 ENGINE SPEED SIGNAL
AT-129
[EURO-OBD]
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AT
DTC P0725 ENGINE SPEED SIGNALPFP:24825
DescriptionECS007OF
The engine speed signal is sent from the ECM to the TCM.
TCM TERMIN

Page 1586 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual AT-130
[EURO-OBD]
DTC P0725 ENGINE SPEED SIGNAL
Wiring Diagram — AT — ENGSS
ECS007OG
YAT 3 5 8

Page 1587 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0725 ENGINE SPEED SIGNAL
AT-131
[EURO-OBD]
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Diagnostic ProcedureECS007OH
1.CHECK DTC WITH ECM
Perform “Overall function check” for ignition signal. Refer to EC-369, &

Page 1588 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual AT-132
[EURO-OBD]
DTC P0725 ENGINE SPEED SIGNAL
4. CHECK DTC
Perform AT-129, "
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE" .
OK or NG
OK >>INSPECTION END
NG >> 1. Perform TCM input/o

Page 1589 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0731 A/T 1ST GEAR FUNCTION
AT-133
[EURO-OBD]
D
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DTC P0731 A/T 1ST GEAR FUNCTIONPFP:31940
DescriptionECS007OI
●This is an OBD-II self-diagnostic item and not available in

DTC P0731 A/T 1ST GEAR FUNCTION
AT-133
[EURO-OBD]
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DTC P0731 A/T 1ST GEAR FUNCTIONPFP:31940
DescriptionECS007OI
●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)
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
11 L / WShift solenoid
valve AWhen shift solenoid valve A oper-
ates.
(When driving in “D
1 ” or “D4 ”.)Battery voltage
When shift solenoid valve A does not
operate.
(When driving in “D
2 ” or “D3 ”.)0V
12 L/YShift solenoid
valve BWhen shift solenoid valve B oper-
ates.
(When driving in “D
1 ” or “D2 ”.)Battery voltage
When shift solenoid valve B does not
operate.
(When driving in “D
3 ” or “D4 ”.)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 open2* 2 3 3
In case of gear position with shift solenoid valve B stuck open4* 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

Page 1590 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual AT-134
[EURO-OBD]
DTC P0731 A/T 1ST GEAR FUNCTION
DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCEDURE
CAUTION:
●Always drive vehicle at a safe speed.
●Be careful not to rev engine into the red zo

Page 1591 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual DTC P0731 A/T 1ST GEAR FUNCTION
AT-135
[EURO-OBD]
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●If “TESTING” does not appear on CONSULT-II for a long time, select “SELF-DIAGNOSIS” for
“ENGINE”

Page 1592 of 3189

NISSAN ALMERA N16 2003 Electronic Repair Manual AT-136
[EURO-OBD]
DTC P0731 A/T 1ST GEAR FUNCTION
Wiring Diagram — AT — 1ST
ECS007OJ
YAT 2 3 5

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