NISSAN ALMERA N16 2001 Electronic Repair Manual

6 ADJUST THROTTLE POSITION SENSOR IDLE POSITION
With CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Turn throttle position sensor body clockwise or counterclockwise until ªTHRTL POS SENº indication becomes 0.35 to
0.65V.
SEF964W
3. Tighten the throttle position sensor fixing bolts.
©GO TO 7.
7 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
With CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Start engine and warm it up to normal operating temperature.
2. Select ªCLSD THL POSº in ªDATA MONITORº mode with CONSULT-II.
3. Stop engine. (Turn ignition switch ªOFFº.)
4. Turn ignition switch ªONº and wait at least 5 seconds.
SEF864V
5. Turn ignition switch ªOFFº and wait at least 9 seconds.
6. Repeat steps 4 and 6 until ªCLSD THL POSº indication changes to ªONº.
SEF061Y
©GO TO 11.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-115

8 CHECK CLOSED THROTTLE POSITION SWITCH IDLE POSITION
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Stop engine.
3. Turn ignition switch ªONº.
4. Check voltage between ECM terminal 92 and ground with accelerator pedal fully released.
NEF315A
Voltage: 0.35 to 0.65V
OK©GO TO 6.
NG©GO TO 9.
9 CHECK THROTTLE VALVE OPERATION
Without CONSULT-II
1. Loosen throttle position sensor fixing bolts.
2. Turn throttle position sensor body clockwise or counterclockwise until the voltage between ECM terminal 92 and ground
becomes 0.35 to 0.65V.
SEF964W
3. Tighten the throttle position sensor fixing bolts.
©GO TO 10.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-116

10 RESET THROTTLE POSITION SENSOR IDLE POSITION MEMORY
Without CONSULT-II
NOTE:
Always warm up engine to normal operating temperature. If engine is cool, the throttle position sensor idle posi-
tion memory will not be reset correctly.
1. Start engine and warm it up to normal operating temperature.
2. Stop engine. (Turn ignition switch ªOFFº).
3. Turn ignition switch ªONº and wait at least 5 seconds.
SEF864V
4. Turn ignition switch ªOFFº and wait at least 9 seconds.
5. Repeat steps 4 and 6, 20 times.
©GO TO 11.
11 CHECK (1ST TRIP) DTC
1. Start engine and warm it up to normal operating temperature.
2. Rev (2,000 to 3,000 rpm) two or three times.
3. Make sure no (1st trip) DTC is displayed with CONSULT-II GST or Diagnostic Test Mode II (Self-diagnostic Results).
OK or NG
OK©GO TO 13.
NG©GO TO 12.
12 REPAIR MALFUNCTION
Repair or replace components as necessary
©GO TO 11.
13 CHECK TARGET IDLE SPEED
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªENG SPEEDº in ªDATA MONITORº mode with CONSULT-II.
3. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
OK or NG
OK©GO TO 22.
NG©GO TO 14.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-117

14 PERFORM IDLE AIR VOLUME LEARNING
Refer to ªIdle Air Volume Learningº, EC-55
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT©GO TO 15.
INCMP©1. Follow the instruction of ªIdle Air Volume Learningº.
2. GO TO 14.
15 CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªENG SPEEDº in ªDATA MONITORº mode with CONSULT-II.
3. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
OK or NG
OK©GO TO 29.
NG (Models with Euro-
OBD system)©GO TO 17.
NG (Models without
Euro-OBD system)©GO TO 16.
16 CHECK IACV-AAC VALVE CIRCUIT FOR OPEN AND SHORT
1. Turn ignition switch ªOFFº.
2. Check IACV-AAC valve circuit for open and short. Refer to ªDiagnostic Procedureº, EC-313.
OK or NG
OK©GO TO 17.
NG©1. Repair or replace.
2. GO TO 18.
17 REPLACE IACV-AAC VALVE
Replace IACV-AAC valve.
©GO TO 18.
18 PERFORM IDLE AIR VOLUME LEARNING
Refer to ªIdle Air Volume Learningº, EC-55
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT©GO TO 19.
INCMP©1. Follow the instruction of ªIdle Air Volume Learningº.
2. GO TO 14.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-118

19 CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªENG SPEEDº in ªDATA MONITORº mode with CONSULT-II.
3. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
OK or NG
OK©GO TO 21.
NG©GO TO 20.
20 CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case.)
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to ªNATS (Nissan Anti-Theft
system)º, EC-72.
©GO TO 14.
21 CHECK IGNITION TIMING
1. Start engine and warm it up to normal operating temperature.
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to ªNATS (Nissan Anti-Theft
System)º, EC-72.
SEM872F
Ignition timing:
M/T 8ɱ5É BTDC
A/T 10ɱ5É BTDC (in ªPº or ªNº position)
OK©GO TO 29.
NG©GO TO 22.
22 CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM section.
OK or NG
OK©GO TO 20.
NG©1. Repair the timing chain installation.
2. GO TO 14.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-119

23 CHECK IGNITION TIMING
1. Start engine and let it idle.
2. Check ignition timing at idle using a timing light.
SEM872F
Ignition timing:
M/T 8ɱ5É BTDC
A/T 10ɱ5É BTDC (in ªPº or ªNº position)
OK©GO TO 29.
NG©GO TO 24.
24 PERFORM IDLE AIR VOLUME LEARNING
Refer to ªIdle Air Volume Learningº, EC-55.
Which is the result CMPLT or INCMP?
CMPLT or INCMP
CMPLT©GO TO 25.
INCMP©1. Follow the construction of ªIdle Air Volume Leaningº.
2. GO TO 24.
25 CHECK TARGET IDLE SPEED AGAIN
With CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Select ªENG SPEEDº in ªDATA MONITORº mode with CONSULT-II.
3. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
Without CONSULT-II
1. Start engine and warm it up to normal operating temperature.
2. Check idle speed.
M/T: 700±50 rpm
A/T: 800±50 rpm (in ªPº or ªNº position)
OK or NG
OK©GO TO 27.
NG©GO TO 26.
26 CHECK ECM FUNCTION
1. Substitute another known-good ECM to check ECM function. (ECM may be the cause of a problem, but this is rarely
the case).
2. Perform initialization of NATS system and registration of NATS ignition key IDs. Refer to ªNATS (Nissan Anti-Theft
System)º, EC-72.
©GO TO 24.
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-120

27 CHECK IGNITION TIMING AGAIN
Check ignition timing again. Refer to Test No. 23.
OK©GO TO 29.
NG©GO TO 28.
28 CHECK TIMING CHAIN INSTALLATION
Check timing chain installation. Refer to EM section.
OK or NG
OK©GO TO 26.
NG©1. Repair the timing chain installation.
2. GO TO 24.
29 ERASE UNNECESSARY DTC
After this inspection, unnecessary DTC No. might be displayed.
Erase the stored memory in ECM.
Refer to ªHOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATIONº, EC-68.
©INSPECTION END
TROUBLE DIAGNOSIS Ð BASIC INSPECTIONQG
Basic Inspection (Cont'd)
EC-121

DTC Inspection Priority ChartNJEC0039If some DTCs are displayed at the same time, perform inspections one by one based on the following prior-
ity chart.
Priority Detected items (DTC)
1+P0100 Mass air flow sensor
+P0110 Intake air temperature sensor
+P0115 Engine coolant temperature sensor
+P0120 Throttle position sensor
+P0325 Knock sensor
+P0340 Camshaft position sensor (PHASE) circuit
+P0403 EGR volume control valve*1
+P0500 Vehicle speed sensor
+P0605 ECM
+P0335 Crankshaft position sensor (POS)
+P1605 A/T diagnostic communication line
+P1706 Park/Neutral position switch
2+P0130 - P0134 Heated oxygen sensor 1 (front)
+P0135 Heated oxygen sensor 1 heater (front)
+P0137 - P0140 Heated oxygen sensor 2 (rear)
+P0141 Heated oxygen sensor 2 heater (rear)
+P0443 EVAP canister purge volume control solenoid valve
+P0510 Closed throttle position switch*1
+P0705 - P0725, P0740 - P1760 A/T related sensors, solenoid valves and switches
+P1217 Overheat (Cooling system)
+P1401 EGR temperature sensor*1
3+P0171, P0172 Fuel injection system function
+P0300 - P0304 Misfire
+P0400, P1402 EGR function*1
+P0420 Three way catalyst function
+P0505 IACV-AAC valve
+P0731 - P0734, P0744 A/T function
+P 1111Intake valve timing control
*1: If so equipped
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
DTC Inspection Priority Chart
EC-122

Fail-safe Chart=NJEC0040The ECM enters fail-safe mode if any of the following malfunctions is detected due to the open or short cir-
cuit. When the ECM enters the fail-safe mode, the MI illuminates.
DTC No.
Detected items Engine operating condition in fail-safe mode CON-
SULT-II
GSTECM*1
P0100 0100 Mass air flow sensor
circuitEngine speed will not rise more than 2,400 rpm due to the fuel cut.
P0115 0115 Engine coolant tempera-
ture sensor circuitEngine coolant temperature will be determined by ECM based on the time
after turning ignition switch ªONº or ªSTARTº.
CONSULT-II displays the engine coolant temperature decided by ECM.
The radiator fan operates.
ConditionEngine coolant temperature decided
(CONSULT-II display)
Just as ignition switch is turned
ON or Start40ÉC (104ÉF)
More than approx. 4 minutes
after ignition ON or Start80ÉC (176ÉF)
Except as shown above40 - 80ÉC (104 - 176ÉF)
(Depends on the time)
P0120 0120 Throttle position sensor
circuitThrottle position will be determined based on the injected fuel amount and
the engine speed. Therefore, acceleration will be poor.
Condition Driving condition
When engine is idling Normal
When accelerating Poor acceleration
Unable to
access
ECMUnable to
access
Diagnostic
Test Mode
IIECMECM fail-safe activating condition
The computing function of the ECM was judged to be malfunctioning.
When the fail-safe system activates (i.e., if the ECM detects a malfunction
condition in the CPU of ECM), the MI on the instrument panel lights to warn
the driver.
However it is not possible to access ECM and DTC cannot be confirmed.
Engine control with fail-safe
When ECM fail-safe is operating, fuel injection, ignition timing, fuel pump
operation and IACV-AAC valve operation are controlled under certain limita-
tions.
ECM fail-safe operation
Engine speedEngine speed will not rise more than
3,000 rpm
Fuel injectionSimultaneous multiport fuel injection sys-
tem
Ignition timing Ignition timing is fixed at the preset value
Fuel pumpFuel pump relay is ªONº when engine is
running and ªOFFº when engine stalls
IACV-AAC valve Full open
Cooling fansCooling fan relay ªONº (High speed condi-
tion) when engine is running, and ªOFFº
when engine stalls.
Replace ECM, if ECM fail-safe condition is confirmed.
*: In Diagnostic Test Mode II (Self-diagnostic results) (If so equipped)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
Fail-safe Chart
EC-123

Symptom Matrix ChartNJEC0041SYSTEM Ð ENGINE CONTROL SYSTEMNJEC0041S01
SYMPTOM
Reference
page
HARD/NO START/RESTART (EXCP. HA)
ENGINE STALL
HESITATION/SURGING/FLAT SPOT
SPARK KNOCK/DETONATION
LACK OF POWER/POOR ACCELERATION
HIGH IDLE/LOW IDLE
ROUGH IDLE/HUNTING
IDLING VIBRATION
SLOW/NO RETURN TO IDLE
OVERHEATS/WATER TEMPERATURE HIGH
EXCESSIVE FUEL CONSUMPTION
EXCESSIVE OIL CONSUMPTION
BATTERY DEAD (UNDER CHARGE)
Warranty symptom code AA AB AC AD AE AF AG AH AJ AK AL AM HA
Fuel Fuel pump circuit11232 22 3 2EC-464
Fuel pressure regulator sys-
tem334444444 4EC-39
Injector circuit11232 22 2EC-447
Evaporative emission sys-
tem334444444 4EC-33
Air Positive crankcase ventila-
tion system334444444 41EC-37
Incorrect idle speed adjust-
ment3 3 1 1 1 1 1 EC-41
IACV-AAC valve circuit112332222 2 2EC-313
Ignition Incorrect ignition timing
adjustment33111 11 1EC-41
Ignition circuit11222 22 2EC-451
EGR EGR volume control valve
circuit2233 3EC-293
EGR system212333223 3EC-285,
293, 353
Main power supply and ground circuit22333 33 23 2EC-145
Air conditioner circuit223333333 3 2HAsection
1 - 6: The numbers refer to the order of inspection.
(continued on next page)
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONQG
Symptom Matrix Chart
EC-124