2003 NISSAN ALMERA N16 Engine Control

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-103
[EURO-OBD]
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Offensive smell at fluid charging
pipe.ON vehicle 1. Fluid levelAT-63, "
FLUID LEVEL
CHECK"
OFF vehicle2. Torque converterAT-417, "
Locations of
Adjusting Shims, Needle
Bearings, Thrust Washers
and Snap Rings"
3. Oil pumpAT-435, "Oil Pump"
4. Reverse clutchAT-455, "Reverse Clutch"
5. High clutchAT-459, "High Clutch"
6. Brake bandAT-483, "Band Servo Pis-
ton Assembly"
7. Forward clutchAT-464, "Forward and
Overrun Clutches"
8. Overrun clutchAT-464, "Forward and
Overrun Clutches"
9. Low & reverse brakeAT-470, "Low & Reverse
Brake"
Torque converter is not locked up.ON vehicle1. Throttle position sensor [Accelerator
pedal position (APP) sensor]AT-181, "
DTC P1705
ACCELERATOR PEDAL
POSITION (APP) SEN-
SOR"
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT-123, "
DTC P0720 VEHI-
CLE SPEED SENSOR A/T
(REVOLUTION SEN-
SOR)",AT-201, "DTC
VEHICLE SPEED SEN-
SOR MTR"
3. PNP switch adjustmentAT-408, "
Park/Neutral Posi-
tion (PNP) Switch Adjust-
ment"
4. Engine speed signalAT-129, "DTC P0725
ENGINE SPEED SIGNAL"
5. A/T fluid temp sen circ and TCM pow sourAT-195, "
DTC BATT/FLUID
TEMP SEN (A/T FLUID
TEMP SENSOR CIRCUIT
AND TCM POWER
SOURCE)"
6. Line pressure testAT-67, "Line Pressure Test"
7. Torque converter clutch solenoid valveAT-159, "
DTC P0740
TORQUE CONVERTER
CLUTCH SOLENOID
VA LV E"
8. Control valve assemblyAT-406, "
Control Valve
Assembly and Accumula-
tors"
OFF vehicle 9. Torque converterAT-417, "
Locations of
Adjusting Shims, Needle
Bearings, Thrust Washers
and Snap Rings"
Symptom Condition Diagnostic ItemReference Page
EURO-OBD

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-105
[EURO-OBD]
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A/T does not shift to “D4 ” when driv-
ing with overdrive control switch
“ON”.ON vehicle1. Throttle position sensor [Accelerator
pedal position (APP) sensor]AT-181, "
DTC P1705
ACCELERATOR PEDAL
POSITION (APP) SEN-
SOR"
2. PNP switch adjustmentAT-408, "
Park/Neutral Posi-
tion (PNP) Switch Adjust-
ment"
3. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT-123, "
DTC P0720 VEHI-
CLE SPEED SENSOR A/T
(REVOLUTION SEN-
SOR)",AT-201, "DTC
VEHICLE SPEED SEN-
SOR MTR"
4. Shift solenoid valve AAT-171, "
DTC P0750
SHIFT SOLENOID VALVE
A"
5. Overrun clutch solenoid valveAT-187, "
DTC P1760
OVERRUN CLUTCH
SOLENOID VALVE"
6. Control valve assemblyAT-406, "
Control Valve
Assembly and Accumula-
tors"
7. A/T fluid temp sen circ and TCM pow sourAT-195, "
DTC BATT/FLUID
TEMP SEN (A/T FLUID
TEMP SENSOR CIRCUIT
AND TCM POWER
SOURCE)"
8. Line pressure testAT-67, "Line Pressure Test"
OFF vehicle9. Brake bandAT-483, "
Band Servo Pis-
ton Assembly"
10. Overrun clutchAT-464, "Forward and
Overrun Clutches"
Engine is stopped at “R”, “D”, “2”
and “1” positions.ON vehicle1. Fluid levelAT-63, "
FLUID LEVEL
CHECK"
2. Torque converter clutch solenoid valveAT-159, "
DTC P0740
TORQUE CONVERTER
CLUTCH SOLENOID
VA LV E"
3. Shift solenoid valve AAT-171, "
DTC P0750
SHIFT SOLENOID VALVE
A"
4. Shift solenoid valve BAT-176, "
DTC P0755
SHIFT SOLENOID VALVE
B"
5. Control valve assemblyAT-406, "
Control Valve
Assembly and Accumula-
tors"
Symptom Condition Diagnostic ItemReference Page
EURO-OBD

CAN COMMUNICATION
AT-109
[EURO-OBD]
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CAN COMMUNICATIONPFP:23710
System DescriptionECS007O2
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN H line, CAN L line) allowing a high rate of information transmission with less wiring.
Each control unit transmits/receives data but selectively reads required data only.
CAN Communication UnitECS007O3
×:Applicable
TYPE1
System diagram
Input/output signal chart
T: Transmit R: Receive Body type Sedan/ 5DH/B/ 3DH/B
Axle2WD
Engine QG18DE QG15DE/QG18DE
Transmission A/T M/T
Brake controlABS
CAN communication unit
ECM××
TCM×
Smart entrance control unit××
Data link connector××
Combination meter××
CAN communication type AT-109, "
TYPE1"AT-110, "TYPE 2"
SEL825Y
Signals ECM TCMSmart entrance
control unitCombination meter
Engine speed signal T R
Brake switch signal R T
Rear window defogger signal R T
Heater fan switch signal R T
Air conditioner switch signal R T
MI signal T R
Current gear position signal T R
Engine coolant temperature signal T R
Fuel consumption signal T R

AT-110
[EURO-OBD]
CAN COMMUNICATION
TYPE 2
System diagram
Input/output signal chart
T: Transmit R: Receive Vehicle speed signal R T
Seat belt reminder signalRT
Headlamp switch signalTR
Flashing indicator signalTR
Engine cooling fan speed signal T R
Child lock indicator signalTR
Door switches state signalTR
A/C compressor signal T R
Accelerator pedal position signal T R
Output shaft revolution signal R T
OD OFF switch signal R T
OD OFF indicator signal T R
A/T self-diagnosis signal R TSignals ECM TCMSmart entrance
control unitCombination meter
SEL826Y
Signals ECMSmart entrance control
unitCombination meter
Engine speed signal T R
Rear window defogger signal R T
Heater fan switch signal R T
Air conditioner switch signal R T
MI signal T R
Engine coolant temperature signal T R
Fuel consumption signal T R
Vehicle speed signal R T
Seat belt reminder signal R T
Headlamp switch signal T R
Flashing indicator signal T R
Engine cooling fan speed signal T R
Child lock indicator signal T R
Door switches state signal T R
A/C compressor signal T R

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

DTC P0732 A/T 2ND GEAR FUNCTION
AT-139
[EURO-OBD]
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DTC P0732 A/T 2ND GEAR FUNCTIONPFP:31940
DescriptionECS007OM
●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 second 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 (2nd) 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 shift solenoid valve B is stuck open.
*: P0732 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.)
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 B stuck open43*3 4
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: A/T 2ND GR FNCTN
A/T cannot be shifted to the 2nd gear
position even if electrical circuit is good.
●Shift solenoid valve B
●Each clutch
●Hydraulic control circuit : P0732

DTC P0733 A/T 3RD GEAR FUNCTION
AT-145
[EURO-OBD]
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DTC P0733 A/T 3RD GEAR FUNCTIONPFP:31940
DescriptionECS007OQ
●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 third 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, malfunctioning servo piston or brake band,
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 (3rd) 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 shift solenoid valve A is stuck closed.
*: P0733 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
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 closed 1 1 4* 4
Diagnostic trouble code Malfunction is detected when... Check items (Possible cause)
: A/T 3RD GR FNCTN
A/T cannot be shifted to the 3rd gear posi-
tion even if electrical circuit is good.
●Shift solenoid valve A
●Each clutch
●Hydraulic control circuit : P0733

DTC P0734 A/T 4TH GEAR FUNCTION
AT-151
[EURO-OBD]
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DTC P0734 A/T 4TH GEAR FUNCTIONPFP:31940
DescriptionECS007OU
●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 fourth gear position or the torque converter
clutch does not lock up 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, malfunctioning oil pump or torque converter clutch, etc.
CONSULT-II REFERENCE VALUE IN DATA MONITOR MODE
Remarks: Specification data are reference values.
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 much lower than the position (4th) supposed by TCM, the slip ratio will be much
less than normal. In case the ratio does not reach the specified value, TCM judges this diagnosis malfunction.
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)
Monitor item Condition Specification
Line pressure solenoid valve dutySmall throttle opening
(Low line pressure)
↓
Large throttle opening
(High line pressure)Approximately 24%
↓
Approximately 95%
Te r m i -
nal No.Wire color Item ConditionJudgement stan-
dard
(Approx.)
1R/WLine pressure
solenoid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 3.0V
When depressing accelerator pedal
fully after warming up engine.0V
2P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.5 - 14V
When depressing accelerator pedal
fully after warming up engine.0V
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