2003 NISSAN ALMERA N16 Engine Control

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION
AT-51
[EURO-OBD]
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AT
TCM SELF-DIAGNOSTIC PROCEDURE (NO TOOLS)
1.CHECK O/D OFF INDICATOR LAMP
1. Start engine and warm it up to normal operating temperature.
2. Turn ignition switch to “OFF” position.
Wait 5 seconds.
3. Turn ignition switch to “ACC” position.
4. Set overdrive control switch to “ON” position.
5. Move selector lever to “P” position.
6. Turn ignition switch to “ON” position. (Do not start engine.)
7. Does O/D OFF indicator lamp come on for about 2 seconds?
Ye s o r N o
Ye s > > G O T O 2
No >> Go to AT- 2 11 , "
1. O/D OFF Indicator Lamp Does Not
Come On" .
2.JUDGEMENT PROCEDURE STEP 1
1. Turn ignition switch to “OFF” position.
2. Turn ignition switch to “ACC” position.
3. Move selector lever to “D” position.
4. Set overdrive control switch to “OFF” position.
5. Turn ignition switch to “ON” position. (Do not start engine.)
–Wait more than 2 seconds after turning ignition switch “ON”.
>> GO TO 3
SAT774B
MCIA3103E
SAT653E

AT-56
[EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
TROUBLE DIAGNOSIS — INTRODUCTION
PFP:00000
IntroductionECS007NU
The TCM receives a signal from the vehicle speed sensor, throttle
position sensor or PNP switch and provides shift control or lock-up
control via A/T solenoid valves.
The TCM also communicates with the ECM by means of a signal
sent from sensing elements used with the EURO-OBD related parts
of the A/T system for malfunction-diagnostic purposes. The TCM is
capable of diagnosing malfunctioning parts while the ECM can store
malfunctions in its memory.
Input and output signals must always be correct and stable in the
operation of the A/T system. The A/T system must be in good oper-
ating condition and be free of valve seizure, solenoid valve malfunc-
tion, etc.
It is much more difficult to diagnose a problem that occurs intermit-
tently rather than continuously. Most intermittent problems are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only, may not find the cause of the problems. A road
test with CONSULT-II (or GST) or a circuit tester connected should
be performed. Follow the “Work Flow”. Refer to AT- 6 0 , "
Work Flow" .
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a drive ability complaint. The cus-
tomer can supply good information about such problems, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A “Diagnostic Worksheet” like the exam-
ple (AT- 5 7 , "
DIAGNOSTIC WORKSHEET" ) should be used.
Start your diagnosis by looking for “conventional” problems first. This
will help troubleshoot drive ability problems on an electronically con-
trolled engine vehicle.
Also check related Service bulletins for information.
SAT631IA
SAT632I
SEF234G

AT-58
[EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
Diagnostic Worksheet
1.❏ Read the Fail-safe and listen to customer complaints.AT-57, "Infor-
mation from
Customer"
2.❏ CHECK A/T FLUIDAT-63, "A/T
Fluid Check"❏ Leakage (Follow specified procedure)
❏ Fluid condition
❏ Fluid level
3.❏ Perform STALL TEST and LINE PRESSURE TEST.AT-64, "
Stall
Te s t",AT- 6 7 ,
"Line Pres-
sure Test"
❏ Stall test — Mark possible damaged components/others.
❏ Torque converter one-way clutch
❏ Reverse clutch
❏ Forward clutch
❏ Overrun clutch
❏ Forward one-way clutch❏ Low & reverse brake
❏ Low one-way clutch
❏ Engine
❏ Line pressure is low
❏ Clutches and brakes except high clutch and
brake band are OK
❏ Line Pressure test — Suspected parts:
4.❏ Perform all ROAD TEST and mark required procedures.AT-68, "
Road
Te s t"
4-
1.Check before engine is started.AT-70, "1.
CHECK
BEFORE
ENGINE IS
STARTED"
❏ SELF-DIAGNOSTIC PROCEDURE/DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCE-
DURE. — Mark detected items.
❏ PNP switch, AT- 111
.
❏ A/T fluid temperature sensor, AT- 11 7
.
❏ Vehicle speed sensor·A/T (Revolution sensor), AT-123
.
❏ Engine speed signal, AT-129
.
❏ Torque converter clutch solenoid valve, AT- 1 5 9
.
❏ Line pressure solenoid valve, AT-164
.
❏ Shift solenoid valve A, AT-171
.
❏ Shift solenoid valve B, AT-176
.
❏ Accelerator pedal position (APP) sensor, AT-181
.
❏ Overrun clutch solenoid valve, AT-187
.
❏ PNP & overdrive control switches, and throttle position sensor, AT- 2 3 7
.
❏ Batt/fluid temp sen (A/T fluid temperature sensor and TCM power source), AT-195
.
❏ Vehicle speed sensor·MTR, AT- 2 0 1
.
❏ CAN communication line, AT-192
.
❏ Control unit (RAM), control unit (ROM), AT- 2 0 5
.
❏ Control unit (EEP ROM), AT- 2 0 7
.
❏ Battery
❏ Others
4-
2.Check at idleAT-71, "
2.
CHECK AT
IDLE"❏ 1. O/D OFF Indicator Lamp Does Not Come On, AT- 2 11 .
❏ 2. Engine Cannot Be Started In “P” And “N” Position, AT- 2 1 2
.
❏ 3. In “P” Position, Vehicle Moves Forward Or Backward When Pushed, AT- 2 1 3
.
❏ 4. In “N” Position, Vehicle Moves, AT- 2 1 4
.
❏ 5. Large Shock. “N” → “R” Position, AT-215
.
❏ 6. Vehicle Does Not Creep Backward In “R” Position, AT- 2 1 6
.
❏ 7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position, AT-219
.

TROUBLE DIAGNOSIS — INTRODUCTION
AT-59
[EURO-OBD]
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4. 4-
3.Cruise testAT- 7 4 , "3.
CRUISE
TEST"
AT- 7 8 ,
"Cruise Test
— Part 1"
Part-1
❏ 8. Vehicle Cannot Be Started From D
1 , AT- 2 2 1 .
❏ 9. A/T Does Not Shift: D
1→ D2 Or Does Not Kickdown: D4→ D2 , AT- 2 2 3 .
❏ 10. A/T Does Not Shift: D
2→ D3 , AT- 2 2 5 .
❏ 11. A/T Does Not Shift: D
3→ D4 , AT-227 .
❏ 12. A/T Does Not Perform Lock-up, AT- 2 3 0
.
❏ 13. A/T Does Not Hold Lock-up Condition, AT- 2 3 1
.
❏ 14. Lock-up Is Not Released, AT- 2 3 2
.
❏ 15. Engine Speed Does Not Return To Idle (Light Braking D
4→ D3 ), AT-233 .
Part-2AT- 8 1 ,
"Cruise Test
— Part 2"❏ 16. Vehicle Does Not Start From D1 , AT- 2 3 4 .
❏ 9. A/T Does Not Shift: D
1→ D2 Or Does Not Kickdown: D4→ D2 , AT- 2 2 3 .
❏ 10. A/T Does Not Shift: D
2→ D3 , AT- 2 2 5 .
❏ 11. A/T Does Not Shift: D
3→ D4 , AT-227 .
Part-3AT- 8 3 ,
"Cruise Test
— Part 3"❏ 17. A/T Does Not Shift: D4→ D3 When Overdrive Control Switch “ON” → “OFF”, AT- 2 3 5 .
❏ 15. Engine Speed Does Not Return To Idle (Light Braking D
4→ D3 ), AT-233 .
❏ 18. A/T Does Not Shift: D
3→ 22 , When Selector Lever “D” → “2” Position, AT-235 .
❏ 15. Engine Speed Does Not Return To Idle (Light Braking D
4→ D3 ), AT-233 .
❏ 19. A/T Does Not Shift: 2
2→ 11 , When Selector Lever “2” → “1” Position, AT-236 .
❏ 20. Vehicle Does Not Decelerate By Engine Brake, AT- 2 3 7
.
❏ 21. TCM Self-diagnosis Does Not Activate (PNP & Overdrive Control Switches, and Throttle Position
Sensor Circuit Checks), AT- 2 3 7
.
❏ SELF-DIAGNOSTIC PROCEDURE/DIAGNOSTIC TROUBLE CODE (DTC) CONFIRMATION PROCE-
DURE — Mark detected items.
❏ PNP switch, AT- 111
.
❏ A/T fluid temperature sensor, AT- 11 7
.
❏ Vehicle speed sensor·A/T (Revolution sensor), AT- 1 2 3
.
❏ Engine speed signal, AT- 1 2 9
.
❏ Torque converter clutch solenoid valve, AT-159
.
❏ Line pressure solenoid valve, AT-164
.
❏ Shift solenoid valve A, AT- 1 7 1
.
❏ Shift solenoid valve B, AT- 1 7 6
.
❏ Accelerator pedal position (APP) sensor, AT-181
.
❏ Overrun clutch solenoid valve, AT- 1 8 7
.
❏ PNP & overdrive control switches, and throttle position sensor, AT- 2 3 7
.
❏ A/T fluid temperature sensor and TCM power source, AT-195
.
❏ Vehicle speed sensor·MTR, AT-201
.
❏ CAN communication line, AT- 1 9 2
❏ Control unit (RAM), control unit (ROM), AT-205 .
❏ Control unit (EEP ROM), AT-207
.
❏ Battery
❏ Others
5.❏ For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts.AT- 5 0 , "
Diag-
nostic Proce-
dure Without
CONSULT-II"
6.❏ Perform all ROAD TEST and re-mark required procedures.AT- 6 8 , "Road
Te s t"
7.❏ Perform DTC CONFIRMATION PROCEDURE for following MI indicating items and check out NG items.
Refer toEC-37, "
Emission-related Diagnostic Information" .EC section
❏ DTC (P0731) A/T 1st gear function, AT- 1 3 3
.
❏ DTC (P0732) A/T 2nd gear function, AT-139
.
❏ DTC (P0733) A/T 3rd gear function, AT- 1 4 5
.
❏ DTC (P0734) A/T 4th gear function, AT- 1 5 1
.

AT-62
[EURO-OBD]
TROUBLE DIAGNOSIS — INTRODUCTION
*1:AT-57, "Information from Customer"*2:AT-58, "Diagnostic Worksheet"*3:AT-7, "Service Notice or Precau-
tions"
*4:AT-63, "A/T Fluid Check"*5:AT-64, "Stall Test" and AT- 6 7 , "Line Pressure
Te s t"
*6:AT- 6 8 , "Road Test"
*7:AT-41, "CONSULT-II"*8:AT-37, "ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION"
*9:AT- 5 0 , "Diagnostic Procedure
Without CONSULT-II"
*10:AT- 111 , "DTC P0705 PARK/NEU-
TRAL POSITION (PNP) SWITCH"
*11:AT-123, "DTC P0720 VEHICLE SPEED
SENSOR A/T (REVOLUTION SENSOR)"
and AT- 2 0 5 , "DTC CONTROL UNIT (RAM),
CONTROL UNIT (ROM)" to AT-207, "DTC
CONTROL UNIT (EEP ROM)"
*12:AT- 2 11 , "1. O/D OFF Indicator
Lamp Does Not Come On"
*13:AT-237, "20. Vehicle Does Not
Decelerate By Engine Brake"
*14:AT-86, "Symptom Chart"*15:AT- 3 9 , "HOW TO ERASE DTC"
*16:AT- 111 , "DTC P0705 PARK/NEU-
TRAL POSITION (PNP) SWITCH"
*17:AT-123, "DTC P0720 VEHICLE SPEED
SENSOR A/T (REVOLUTION SENSOR)"
and AT- 2 0 5 , "DTC CONTROL UNIT (RAM),
CONTROL UNIT (ROM)" to AT-207, "DTC
CONTROL UNIT (EEP ROM)"
*18:EC-429, "Emission-related Diag-
nostic Information"

TROUBLE DIAGNOSIS — BASIC INSPECTION
AT-65
[EURO-OBD]
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JUDGEMENT OF STALL TEST
The test result and possible damaged components relating to each result are shown in the illustrations on next
page.
In order to pinpoint the possible damaged components, follow the WORK FLOW shown in AT-60, "
Work Flow"
(EURO-OBD).
NOTE:
Stall revolution is too high in “D”, “2” or “1” position:
●Slippage occurs in 1st gear but not in 2nd and 3rd gears...... Low one-way clutch slippage
●Slippage occurs in the following gears:
1st through 3rd gears in “D” position and engine brake functions with overdrive control switch set to
“OFF”.
1st and 2nd gears in “2” position and engine brake functions with accelerator pedal released (fully closed
throttle)...... Forward clutch or forward one-way clutch slippage
Stall revolution is too high in R position:
●Engine brake does not function in “1” position...... Low & reverse brake slippage
●Engine brake functions in “1” position...... Reverse clutch slippage
Stall revolution within specifications:
●Vehicle does not achieve speed of more than 80 km/h (50 MPH)...... One-way clutch seizure in torque
converter housing
CAUTION:
Be careful since automatic fluid temperature increases abnormally.
●Slippage occurs in 3rd and 4th gears in “D” position...... High clutch slippage
●Slippage occurs in 2nd and 4th gear in “D” position...... Brake band slippage
●Engine brake does not function in 2nd and 3rd gears in “D” position, 2nd gear in “2” position, and 1st gear
in “1” position with overdrive control switch set to “OFF”.
Stall revolution less than specifications:
●Poor acceleration during starts...... One-way clutch seizure in torque converter

AT-68
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
JUDGEMENT OF LINE PRESSURE TEST
Road TestECS007NZ
DESCRIPTION
●The purpose of the test is to determine overall performance of A/
T and analyze causes of problems.
●The road test consists of the following three parts:
1. Check before engine is started
2. Check at idle
3. Cruise test
●Before road test, familiarize yourself with all test procedures and
items to check.
●Conduct tests on all items until specified symptom is found.
Troubleshoot items which check out No Good after road test.
Refer to the following items.
Judgement Suspected parts
At idleLine pressure is low in all positions.
●Oil pump wear
●Control piston damage
●Pressure regulator valve or plug sticking
●Spring for pressure regulator valve damaged
●Line pressure leakage between oil strainer and pressure regulator valve
●Clogged strainer
Line pressure is low in particular posi-
tion.
●Line pressure leakage between manual valve and particular clutch
●For example, line pressure is:
− Low in “R” and “1” positions, but
− Normal in “D” and “2” positions.
Therefore, fluid leakage exists at or around low and reverse brake circuit.
Refer to AT- 1 8 , "
Shift Mechanism" .
Line pressure is high.
●Maladjustment of throttle position sensor
●A/T fluid temperature sensor damaged
●Line pressure solenoid valve sticking
●Short circuit of line pressure solenoid valve circuit
●Pressure modifier valve sticking
●Pressure regulator valve or plug sticking
●Open in dropping resistor circuit
At stall
speedLine pressure is low.
●Maladjustment of throttle position sensor
●Line pressure solenoid valve sticking
●Short circuit of line pressure solenoid valve circuit
●Pressure regulator valve or plug sticking
●Pressure modifier valve sticking
●Pilot valve sticking
SAT786A
SAT496G

AT-70
[EURO-OBD]
TROUBLE DIAGNOSIS — BASIC INSPECTION
1. CHECK BEFORE ENGINE IS STARTED
1. CHECK O/D OFF INDICATOR LAMP
1. Park vehicle on flat surface.
2. Turn ignition switch to “OFF” position.
3. Move selector lever to “P” position.
4. Set overdrive control switch to “ON” position.
5. Turn ignition switch to “ON” position. (Do not start engine.)
6. Does O/D OFF indicator lamp come on for about 2 seconds?
Ye s o r N o
Yes >> GO TO 2
No >> Stop ROAD TEST. GO TO “1. O/D OFF Indicator Lamp
Does Not Come On” AT- 2 11
.
2. CHECK O/D OFF INDICATOR LAMP
Does O/D OFF indicator lamp flicker for about 8 seconds?
Ye s o r N o
Yes >> Perform self-diagnosis and check NG items on the AT-
57, "DIAGNOSTIC WORKSHEET" . Refer to AT- 5 1 ,
"TCM SELF-DIAGNOSTIC PROCEDURE (NO
TOOLS)" .
No >> 1. Turn ignition switch to “OFF” position.
2. Perform self-diagnosis and note NG items.
Refer to AT- 5 1 , "
TCM SELF-DIAGNOSTIC PROCE-
DURE (NO TOOLS)" .
3. GO TO “2. CHECK AT IDLE” AT- 7 1
.
SAT774B
MCIA3103E
MCIA3103E