Almera Tino V10 (2003 year). Manual — part 97
ENGINE CONTROL SYSTEM
EC-571
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SYSTEM DESCRIPTION
The ignition timing is controlled by the ECM to maintain the best air-
fuel ratio for every running condition of the engine. The ignition tim-
ing data is stored in the ECM. This data forms the map shown.
The ECM receives information such as the injection pulse width and
camshaft position sensor signal. Computing this information, ignition
signals are transmitted to the power transistor.
e.g., N: 1,800 rpm, Tp: 1.50 msec
A
°
BTDC
During the following conditions, the ignition timing is revised by the
ECM according to the other data stored in the ECM.
●
At starting
●
During warm-up
●
At idle
●
At low battery voltage
●
During acceleration
The knock sensor retard system is designed only for emergencies. The basic ignition timing is programmed
within the anti-knocking zone, if recommended fuel is used under dry conditions. The retard system does not
operate under normal driving conditions. If engine knocking occurs, the knock sensor monitors the condition.
The signal is transmitted to the ECM. The ECM retards the ignition timing to eliminate the knocking condition.
Air Conditioning Cut Control
EBS00QUT
INPUT/OUTPUT SIGNAL CHART
*1: These signals are sent to the ECM through CAN communication line.
*2: The ECM determines the start signal status by the signals of engine speed and battery voltage.
SYSTEM DESCRIPTION
This system improves engine operation when the air conditioner is used.
Under the following conditions, the air conditioner is turned off.
●
When the accelerator pedal is fully depressed.
●
When cranking the engine.
●
At high engine speeds.
●
When the engine coolant temperature becomes excessively high.
●
When operating power steering during low engine speed or low vehicle speed.
●
When engine speed is excessively low.
●
When refrigerant pressure is excessively low or high.
SEF742M
Sensor
Input Signal to ECM
ECM function
Actuator
Air conditioner switch
*1
Air conditioner “ON” signal
Air conditioner
cut control
Air conditioner relay
Throttle position sensor
Throttle valve opening angle
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
*2
Engine coolant temperature sensor
Engine coolant temperature
Battery
Battery voltage
*2
Refrigerant pressure sensor
Refrigerant pressure
Power steering pressure sensor
Power steering operation
Vehicle speed signal
*1
Vehicle speed
EC-572
[QG (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM
Fuel Cut Control (at No Load and High Engine Speed)
EBS00QUU
INPUT/OUTPUT SIGNAL CHART
*1: This signal is sent to the ECM through CAN communication line.
SYSTEM DESCRIPTION
If the engine speed is above 3,950 rpm with no load (for example, in neutral and engine speed over 3,950
rpm) fuel will be cut off after some time. The exact time when the fuel is cut off varies based on engine speed.
Fuel cut will operate until the engine speed reaches 1,500 rpm, then fuel cut is cancelled.
NOTE:
This function is different from deceleration control listed under “Multiport Fuel Injection (MFI) System”,
.
CAN Communication
EBS00QUV
SYSTEM DESCRIPTION
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.
A/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
Sensor
Input Signal to ECM
ECM function
Actuator
Park/neutral position (PNP) switch
Neutral position
Fuel cut control
Fuel injectors
Throttle position sensor
Throttle position
Accelerator pedal position sensor
Accelerator pedal position
Engine coolant temperature sensor
Engine coolant temperature
Crankshaft position sensor (POS)
Camshaft position sensor (PHASE)
Engine speed
Vehicle speed signal
*1
Vehicle speed
YEL468E
Signals
ECM
TCM
ABS actuator
and electric
unit (control
unit)
Smart entrance
control unit
Combination
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
ENGINE CONTROL SYSTEM
EC-573
[QG (WITHOUT EURO-OBD)]
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M/T MODELS
System diagram
Input/output signal chart
T: Transmit R: Receive
Engine coolant temperature signal
T
R
Fuel consumption signal
T
R
Vehicle speed signal
T
R
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
Door switches state signal
T
R
A/C compressor signal
T
R
A/C compressor feedback signal
T
R
Accelerator pedal position signal
T
R
Output shaft revolution signal
R
T
ABS operation signal
T
R
OD OFF switch signal
R
T
OD OFF indicator signal
T
R
A/T self-diagnosis signal
R
T
ABS warning lamp signal
T
R
N range switch signal
R
T
P range switch signal
R
T
Signals
ECM
TCM
ABS actuator
and electric
unit (control
unit)
Smart entrance
control unit
Combination
meter
YEL469E
Signals
ECM
ABS actuator and
electric unit (con-
trol unit)
Smart entrance
control unit
Combination 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
EC-574
[QG (WITHOUT EURO-OBD)]
ENGINE CONTROL SYSTEM
Vehicle speed signal
T
R
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
Door switches state signal
T
R
A/C compressor signal
T
R
A/C compressor feedback signal
T
R
ABS operation signal
T
R
ABS warning lamp signal
T
R
Signals
ECM
ABS actuator and
electric unit (con-
trol unit)
Smart entrance
control unit
Combination meter
BASIC SERVICE PROCEDURE
EC-575
[QG (WITHOUT EURO-OBD)]
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BASIC SERVICE PROCEDURE
PFP:00018
Idle Speed and Ignition Timing Check
EBS00QUW
IDLE SPEED
With CONSULT-II
Check idle speed in “DATA MONITOR” mode with CONSULT-II.
Without CONSULT-II
Check the idle speed by installing the pulse type tachometer clamp on the loop wire or on suitable high-tension
wire which is installed between No. 1 ignition coil and No. 1 spark plug.
NOTE:
For the method of installing the tachometer, refer to
.
IGNITION TIMING
Any of following two methods may be used.
Method A
1.
Slide the harness protector of ignition coil No. to clear the wires.
2.
Attach timing light to the wires as shown.
3.
Check ignition timing.
Method B
1.
Remove No. 1 ignition coil.
SEF058Y
MBIB0047E
MBIB0048E
EC-576
[QG (WITHOUT EURO-OBD)]
BASIC SERVICE PROCEDURE
2.
Connect No. 1 ignition coil and No. 1 spark plug with suitable
high-tension wire as shown, and attach timing light clamp to this
wire.
3.
Check ignition timing.
Accelerator Pedal Released Position Learning
EBS00QUX
DESCRIPTION
“Accelerator Pedal Released Position Learning” is an operation to learn the fully released position of the accel-
erator pedal by monitoring the accelerator pedal position sensor output signal. It must be performed each time
harness connector of accelerator pedal position sensor or ECM is disconnected.
OPERATION PROCEDURE
1.
Make sure that accelerator pedal is fully released.
2.
Turn ignition switch “ON” and wait at least 2 seconds.
3.
Turn ignition switch “OFF” wait at least 10 seconds.
4.
Turn ignition switch “ON” and wait at least 2 seconds.
5.
Turn ignition switch “OFF” wait at least 10 seconds.
Throttle Valve Closed Position Learning
EBS00QUY
DESCRIPTION
“Throttle Valve Closed Position Learning” is an operation to learn the fully closed position of the throttle valve
by monitoring the throttle position sensor output signal. It must be performed each time harness connector of
electric throttle control actuator or ECM is disconnected.
OPERATION PROCEDURE
1.
Make sure that accelerator pedal is fully released.
2.
Turn ignition switch “ON”.
3.
Turn ignition switch “OFF” wait at least 10 seconds.
Make sure that throttle valve moves during above 10 seconds by confirming the operating sound.
Idle Air Volume Learning
EBS00QUZ
DESCRIPTION
“Idle Air Volume Learning” is an operation to learn the idle air volume that keeps each engine within the spe-
cific range. It must be performed under any of the following conditions:
●
Each time electric throttle control actuator or ECM is replaced.
●
Idle speed or ignition timing is out of specification.
MBIB0049E
SEF166Y
BASIC SERVICE PROCEDURE
EC-577
[QG (WITHOUT EURO-OBD)]
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PREPARATION
Before performing “Idle Air Volume Learning”, make sure that all of the following conditions are satisfied.
Learning will be cancelled if any of the following conditions are missed for even a moment.
●
Battery voltage: More than 12.9V (At idle)
●
Engine coolant temperature: 70 - 95
°
C (158 - 203
°
F)
●
PNP switch: ON
●
Electric load switch: OFF
(Air conditioner, headlamp, rear window defogger)
On vehicles equipped with daytime light systems, set lighting switch to the 1st position to light
only small lamps.
●
Steering wheel: Neutral (Straight-ahead position)
●
Vehicle speed: Stopped
●
Transmission: Warmed-up
For models with CONSULT-II, drive vehicle until “FLUID TEMP SE” in “DATA MONITOR” mode of “A/T”
system indicates less than 0.9V.
For models without CONSULT-II, drive vehicle for 10 minutes.
OPERATION PROCEDURE
With CONSULT-II
1.
Perform
EC-576, "Accelerator Pedal Released Position Learning"
.
2.
Perform
EC-576, "Throttle Valve Closed Position Learning"
.
3.
Start engine and warm it up to normal operating temperature.
4.
Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
5.
Select “IDLE AIR VOL LEARN” in “WORK SUPPORT” mode.
6.
Touch “START” and wait 20 seconds.
SEF217Z
SEF454Y
EC-578
[QG (WITHOUT EURO-OBD)]
BASIC SERVICE PROCEDURE
7.
Make sure that “CMPLT” is displayed on CONSULT-II screen. If
“CMPLT” is not displayed, “Idle Air Volume Learning” will not be
carried out successfully. In this case, find the cause of the inci-
dent by referring to the “Diagnostic Procedure” below.
8.
Rev up the engine two or three times and make sure that idle
speed and ignition timing are within the specifications.
Without CONSULT-II
NOTE:
●
It is better to count the time accurately with a clock.
●
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
1.
Perform
EC-576, "Accelerator Pedal Released Position Learning"
.
2.
Perform
EC-576, "Throttle Valve Closed Position Learning"
.
3.
Start engine and warm it up to normal operating temperature.
4.
Check that all items listed under the topic “PREPARATION” (previously mentioned) are in good order.
5.
Turn ignition switch “OFF” and wait at least 10 seconds.
6.
Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
7.
Repeat the following procedure quickly five times within 5 seconds.
a.
Fully depress the accelerator pedal.
b.
Fully release the accelerator pedal.
8.
Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 20 seconds until the MI stops
blinking and turned ON.
9.
Fully release the accelerator pedal within 3 seconds after the MI turned ON.
10. Start engine and let it idle.
11. Wait 20 seconds.
12. Rev up the engine two or three times and make sure that idle speed and ignition timing are within the
specifications.
13. If idle speed and ignition timing are not within the specification, “Idle Air Volume Learning” will not be car-
ried out successfully. In this case, find the cause of the incident by referring to the “Diagnostic Procedure”
below.
ITEM
SPECIFICATION
Idle speed
M/T: 700
±
50 rpm (in “Neutral” position)
A/T: 800
±
50 rpm (in “P” or “N” position)
Ignition timing
M/T: 8
±
5
°
BTDC (in “Neutral” position)
A/T: 10
±
5
°
BTDC (in “P” or “N” position)
MBIB0238E
ITEM
SPECIFICATION
Idle speed
M/T: 700
±
50 rpm (in “Neutral” position)
A/T: 800
±
50 rpm (in “P” or “N” position)
Ignition timing
M/T: 8
±
5
°
BTDC (in “Neutral” position)
A/T: 10
±
5
°
BTDC (in “P” or “N” position)
PBIB0665E
BASIC SERVICE PROCEDURE
EC-579
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DIAGNOSTIC PROCEDURE
If idle air volume learning cannot be performed successfully, proceed as follows:
1.
Check that throttle valve is fully closed.
2.
Check PCV valve operation.
3.
Check that downstream of throttle valve is free from air leakage.
4.
When the above three items check out OK, engine component parts and their installation condi-
tion are questionable. Check and eliminate the cause of the incident.
It is useful to perform
EC-640, "TROUBLE DIAGNOSIS - SPECIFICATION VALUE"
.
5.
If any of the following conditions occur after the engine has started, eliminate the cause of the
incident and perform “Idle air volume learning” all over again:
–
Engine stalls.
–
Erroneous idle.
Fuel Pressure Check
EBS00QV0
FUEL PRESSURE RELEASE
Before disconnecting fuel line, release fuel pressure from fuel line to eliminate danger.
NOTE:
Prepare pans or saucers under the disconnected fuel line because the fuel may spill out. The fuel pres-
sure cannot be completely released because V10 models do not have fuel return system.
With CONSULT-II
1.
Turn ignition switch “ON”.
2.
Perform “FUEL PRESSURE RELEASE” in “WORK SUPPORT”
mode with CONSULT-II.
3.
Start engine.
4.
After engine stalls, crank it two or three times to release all fuel
pressure.
5.
Turn ignition switch “OFF”.
Without CONSULT-II
1.
Remove fuel pump fuse located in fuse box.
2.
Start engine.
3.
After engine stalls, crank it two or three times to release all fuel
pressure.
4.
Turn ignition switch “OFF”.
5.
Reinstall fuel pump fuse after servicing fuel system.
FUEL PRESSURE CHECK
NOTE:
●
When reconnecting fuel line, always use new clamps.
●
Make sure that clamp screw does not contact adjacent parts.
●
Use a torque driver to tighten clamps.
●
Use Pressure Gauge to check fuel pressure.
1.
Release fuel pressure to zero. Refer to
EC-579, "FUEL PRESSURE RELEASE"
.
SEF214Y
MBIB0999E
EC-580
[QG (WITHOUT EURO-OBD)]
BASIC SERVICE PROCEDURE
2.
Install the fuel pressure gauge with the fuel pressure check
adapter as shown in the figure.
3.
Turn ignition switch “ON”, and check for fuel leakage.
4.
Start engine and check for fuel leakage.
5.
Read the indication of fuel pressure gauge.
6.
If result is unsatisfactory, go to next step.
7.
Check the following.
●
Fuel hoses and fuel tubes for clogging
●
Fuel filter for clogging
●
Fuel pump
●
Fuel pressure regulator for clogging
If OK, replace fuel pressure regulator.
If NG, repair or replace.
At idling:
Approximately 350 kPa
(3.5 bar, 3.57 kg/cm
2
, 51 psi)
MBIB0050E
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-581
[QG (WITHOUT EURO-OBD)]
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ON BOARD DIAGNOSTIC (OBD) SYSTEM
PFP:00028
Introduction
EBS00QV1
The ECM has an on board diagnostic system, which detects malfunctions related to engine sensors or actua-
tors. The ECM also records various emission-related diagnostic information including:
The above information can be checked using procedures listed in the table below.
×
: Applicable
—: Not applicable
*1: When DTC and 1st trip DTC simultaneously appear on the display, they cannot be clearly distinguished from each other.
The malfunction indicator (MI) on the instrument panel lights up when the same malfunction is detected in two
consecutive trips (Two trip detection logic), or when the ECM enters fail-safe mode. (Refer to
.)
Two Trip Detection Logic
EBS00QV2
When a malfunction is detected for the first time, 1st trip DTC and 1st trip Freeze Frame data are stored in the
ECM memory. The MI will not light up at this stage. <1st trip>
If the same malfunction is detected again during the next drive, the DTC and Freeze Frame data are stored in
the ECM memory, and the MI lights up. The MI lights up at the same time when the DTC is stored. <2nd trip>
The “trip” in the “Two Trip Detection Logic” means a driving mode in which self-diagnosis is performed during
vehicle operation. When the ECM enters fail-safe mode (Refer to
.), the DTC is stored in the ECM
memory even in the 1st trip.
When there is an open circuit on MI circuit, the ECM can not warn the driver by lighting up MI when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system has trouble and MI circuit is open by means of
operating fail-safe function.
The fail-safe function also operate when above diagnoses except MI circuit are detected and demands the
driver to repair the trouble.
Emission-related Diagnostic Information
EBS00QV3
DTC AND 1ST TRIP DTC
The 1st trip DTC (whose number is the same as the DTC number) is displayed for the latest self-diagnostic
result obtained. If the ECM memory was cleared previously, and the 1st trip DTC did not reoccur, the 1st trip
DTC will not be displayed.
If a malfunction is detected during the 1st trip, the 1st trip DTC is stored in the ECM memory. The MI will not
light up (two trip detection logic). If the same malfunction is not detected in the 2nd trip (meeting the required
driving pattern), the 1st trip DTC is cleared from the ECM memory. If the same malfunction is detected in the
2nd trip, both the 1st trip DTC and DTC are stored in the ECM memory and the MI lights up. In other words,
the DTC is stored in the ECM memory and the MI lights up when the same malfunction occurs in two consec-
utive trips. If a 1st trip DTC is stored and a non-diagnostic operation is performed between the 1st and 2nd
trips, only the 1st trip DTC will continue to be stored. For fail-safe items, the DTC is stored in the ECM memory
even in the 1st trip.
Procedures for clearing the DTC and the 1st trip DTC from the ECM memory are described in
TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"
.
When a 1st trip DTC is detected, check, print out or write down and erase (1st trip) DTC and Freeze Frame
data as specified in “Work Flow” procedure Step II, refer to
. Then perform “DTC Confirmation Proce-
dure” or “Overall Function Check” to try to duplicate the problem. If the malfunction is duplicated, the item
requires repair.
Emission-related diagnostic information
Diagnostic Trouble Code (DTC)
Freeze Frame data
1st Trip Diagnostic Trouble Code (1st Trip DTC)
1st Trip Freeze Frame data
DTC
1st trip DTC
Freeze Frame data
1st trip Freeze Frame
data
CONSULT-II
×
×
×
×
ECM
×
×
*
1
—
—
Engine operating condition in fail-safe mode
Engine speed will not rise more than 2,500 rpm due to the fuel cut
EC-582
[QG (WITHOUT EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
How to Read DTC and 1st Trip DTC
DTC and 1st trip DTC can be read by the following methods.
With CONSULT-II
CONSULT-II displays the DTC in “SELF-DIAG RESULTS” mode. Examples: P0117, P0340, P1065, etc.
(CONSULT-II also displays the malfunctioning component or system.)
Without CONSULT-II
The number of blinks of the MI in the Diagnostic Test Mode II (Self-Diagnostic Results) indicates the DTC.
Example: 0117, 0340 1065 etc.
●
1st trip DTC No. is the same as DTC No.
●
Output of a DTC indicates a malfunction. However, the Diagnostic Test Mode II does not indicate
whether the malfunction is still occurring or has occurred in the past and has returned to normal.
CONSULT-II can identify malfunction status as shown below. Therefore, using CONSULT-II (if avail-
able) is recommended.
A sample of CONSULT-II display for DTC and 1st trip DTC is shown below. DTC or 1st trip DTC of a malfunc-
tion is displayed in SELF-DIAGNOSTIC RESULTS mode of CONSULT-II. Time data indicates how many times
the vehicle was driven after the last detection of a DTC.
If the DTC is being detected currently, the time data will be “0”.
If a 1st trip DTC is stored in the ECM, the time data will be “[1t]”.
FREEZE FRAME DATA AND 1ST TRIP FREEZE FRAME DATA
The ECM records the driving conditions such as fuel system status, calculated load value, engine coolant tem-
perature, short term fuel trim, long term fuel trim, engine speed, vehicle speed, base fuel schedule and intake
air temperature at the moment a malfunction is detected.
Data which are stored in the ECM memory, along with the 1st trip DTC, are called 1st trip freeze frame data.
The data, stored together with the DTC data, are called freeze frame data and displayed on CONSULT-II. For
details, see
.
Only one set of freeze frame data (either 1st trip freeze frame data or freeze frame data) can be stored in the
ECM. 1st trip freeze frame data is stored in the ECM memory along with the 1st trip DTC. There is no priority
for 1st trip freeze frame data and it is updated each time a different 1st trip DTC is detected. However, once
freeze frame data (2nd trip detection/MI on) is stored in the ECM memory, 1st trip freeze frame data is no
longer stored. Remember, only one set of freeze frame data can be stored in the ECM.
Both 1st trip freeze frame data and freeze frame data (along with the DTCs) are cleared when the ECM mem-
ory is erased. Procedures for clearing the ECM memory are described in
SION-RELATED DIAGNOSTIC INFORMATION"
.
HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION
How to Erase DTC ( With CONSULT-II)
The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
1.
If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once. Wait at least
10 seconds and then turn it “ON” (engine stopped) again.
2.
Touch “ENGINE”.
3.
Touch “SELF-DIAG RESULTS”.
PBIB0911E
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-583
[QG (WITHOUT EURO-OBD)]
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4.
Touch “ERASE”. (The DTC in the ECM will be erased.)
How to Erase DTC ( Without CONSULT-II)
1.
If the ignition switch stays “ON” after repair work, be sure to turn ignition switch “OFF” once.
2.
Wait at least 10 seconds and then turn it “ON” (engine stopped) again.
3.
Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to
EC-585, "HOW TO SWITCH DIAGNOSTIC TEST MODE"
.
●
If the battery is disconnected, the emission-related diagnostic information will be lost after
approx. 24 hours.
●
The following data are cleared when the ECM memory is erased.
–
Diagnostic trouble codes
–
1st trip diagnostic trouble codes
–
Freeze frame data
–
1st trip freeze frame data
–
Others
Actual work procedures are explained using a DTC as an example. Be careful so that not only the DTC, but all
of the data listed above, are cleared from the ECM memory during work procedures.
NATS (Nissan Anti-theft System)
EBS00QV4
●
If the security indicator lights up with the ignition switch in
the “ON” position or “NATS MALFUNCTION” is displayed
on “SELF-DIAG RESULTS” screen, perform self-diagnostic
results mode with CONSULT-II using NATS program card.
Refer to “NATS (NISSAN ANTI-THEFT SYSTEM)”, EL-352.
●
Confirm no self-diagnostic results of NATS is displayed
before touching “ERASE” in “SELF-DIAG RESULTS” mode
with CONSULT-II.
●
When replacing ECM, initialization of NATS system and reg-
istration of all NATS ignition key IDs must be carried out
with CONSULT-II using NATS program card.
Therefore, be sure to receive all keys from vehicle owner.
Regarding the procedures of NATS initialization and NATS ignition key ID registration, refer to
CONSULT-II operation manual, NATS.
PBIB0671E
SEF515Y
EC-584
[QG (WITHOUT EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
Malfunction Indicator (MI)
EBS00QV5
DESCRIPTION
The MI is located on the instrument panel.
1.
The MI will light up when the ignition switch is turned ON without
the engine running. This is a bulb check.
If the MI does not light up, refer to “WARNING LAMPS”, EL-115
or see
.
2.
When the engine is started, the MI should go off.
If the MI remains on, the on board diagnostic system has
detected an engine system malfunction.
ON BOARD DIAGNOSTIC SYSTEM FUNCTION
The on board diagnostic system has the following four functions.
When there is an open circuit on MI circuit, the ECM can not warn the driver by lighting up MI when there is
malfunction on engine control system.
Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected as
NG for 5 trips, ECM warns the driver that engine control system has trouble and MI circuit is open by means of
operating fail-safe function.
The fail-safe function also operate when above diagnoses except MI circuit are detected and demands the
driver to repair the trouble.
SAT652J
Diagnostic Test
Mode
KEY and ENG.
Status
Function
Explanation of Function
Mode I
Ignition switch in
“ON” position
Engine stopped
BULB CHECK
This function checks the MI bulb for damage (blown, open
circuit, etc.).
If the MI does not come on, check MI circuit.
Engine running
MALFUNCTION
WARNING
This is a usual driving condition. When a malfunction is
detected twice in two consecutive driving cycles (two trip
detection logic), the MI will light up to inform the driver that
a malfunction has been detected.
The following malfunctions will light up the MI in the 1st
trip.
●
“One trip detection diagnoses”
Mode II
Ignition switch in
“ON” position
Engine stopped
SELF-DIAGNOSTIC
RESULTS
This function allows DTCs and 1st trip DTCs to be read.
Engine running
HEATED OXYGEN SENSOR 1
MONITOR
This function allows the fuel mixture condition (lean or
rich), monitored by heated oxygen sensor 1, to be read.
Engine operating condition in fail-safe mode
Engine speed will not rise more than 2,500 rpm due to the fuel cut
ON BOARD DIAGNOSTIC (OBD) SYSTEM
EC-585
[QG (WITHOUT EURO-OBD)]
C
D
E
F
G
H
I
J
K
L
M
A
EC
MI Flashing without DTC
If the ECM is in Diagnostic Test Mode II, MI may flash when engine is running. In this case, check ECM diag-
nostic test mode. Refer to
EC-585, "HOW TO SWITCH DIAGNOSTIC TEST MODE"
.
How to switch the diagnostic test (function) modes, and details of the above functions are described later
585, "HOW TO SWITCH DIAGNOSTIC TEST MODE"
.
The following emission-related diagnostic information is cleared when the ECM memory is erased.
●
Diagnostic trouble codes
●
1st trip diagnostic trouble codes
●
Freeze frame data
●
1st trip freeze frame data
●
Others
HOW TO SWITCH DIAGNOSTIC TEST MODE
NOTE:
●
It is better to count the time accurately with a clock.
●
It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.
●
Always ECM returns to Diagnostic Test Mode I after ignition switch is turned “OFF”.
How to Set Diagnostic Test Mode II (Self-diagnostic Results)
1.
Confirm that accelerator pedal is fully released, turn ignition switch “ON” and wait 3 seconds.
2.
Repeat the following procedure quickly five times within 5 seconds.
a.
Fully depress the accelerator pedal.
b.
Fully release the accelerator pedal.
3.
Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MI starts
blinking.
4.
Fully release the accelerator pedal.
ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).
How to Set Diagnostic Test Mode II (Heated Oxygen Sensor 1 Monitor)
1.
Set the ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to
EC-585, "How to Set Diagnostic
Test Mode II (Self-diagnostic Results)"
.
2.
Start Engine.
ECM has entered to Diagnostic Test Mode II (Heated oxygen sensor 1 monitor).
ECM will start heated oxygen sensor 1 monitoring from the bank 1 sensor for A/T models.
How to Switch Monitored Sensor From Bank 1 to Bank 2 or Vice Versa
1.
Fully depress the accelerator pedal quickly and then release it immediately.
PBIB0092E
EC-586
[QG (WITHOUT EURO-OBD)]
ON BOARD DIAGNOSTIC (OBD) SYSTEM
2.
Make sure that monitoring sensor has changed by MI blinking as follows.
How to Erase Diagnostic Test Mode II (Self-diagnostic Results)
1.
Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to
EC-585, "How to Set Diagnostic
Test Mode II (Self-diagnostic Results)"
.
2.
Fully depress the accelerator pedal and keep it for more than 10 seconds.
The emission-related diagnostic information has been erased from the backup memory in the ECM.
3.
Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.
DIAGNOSTIC TEST MODE I — BULB CHECK
In this mode, the MI on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
“WARNING LAMPS”, EL-115 or see
.
DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING
●
These DTC numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)
DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS
In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MI as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MI does not illuminate in diagnostic test mode
I (Malfunction warning), all displayed items are 1st trip DTCs. If only one code is displayed when the MI illumi-
nates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes are dis-
played, they may be either DTCs or 1st trip DTCs. DTC No. is same as that of 1st trip DTC. These unidentified
codes can be identified by using the CONSULT-II. A DTC will be used as an example for how to read a code.
PBIB0093E
MI
Condition
ON
When the malfunction is detected.
OFF
No malfunction.
PBIA3905E
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