Index Manuals Almera Tino V10 (2003 year) - Service and Repair Manual

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Almera Tino V10 (2003 year). Manual - part 121

ENGINE CONTROL SYSTEM

EC-955

[YD (WITH EURO-OBD)]

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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

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

EC-956

[YD (WITH EURO-OBD)]

BASIC SERVICE PROCEDURE

BASIC SERVICE PROCEDURE

PFP:00018

Fuel Filter

EBS0137Z

DESCRIPTION

A water draining cock is on the lower side and a priming pump for bleeding air is on the upper side.

AIR BLEEDING

Pump the priming pump to bleed air.

●

When air is bled completely, the pumping of the priming pump
suddenly becomes heavy. Stop the operation at that time.

●

If it is difficult to bleed air by the pumping of the priming pump
(the pumping of the priming pump does not become heavy), dis-
connect the fuel supply hose between the fuel filter and the fuel
gallery. Then, perform the operation described above, and make
sure that fuel comes out. (Use a pan, etc. so as not to spill fuel.
Do not let fuel get on engine and other parts.) After that, connect
the hose, then bleed air again.

●

Start engine and let it idle for at least 1 minute after performing
air bleeding.

WATER DRAINING

1.

Remove the fuel filter, filter bracket, protector assembly from the dash panel as follows.

a.

Remove the air cleaner case (upper), air duct assembly, and vacuum hose for brake booster (between the
vacuum pump and vacuum pipe).

CAUTION:

After the duct is removed, cover the opening with gum tape, etc. to prevent foreign object from
getting into the engine during the operation.

b.

Remove the mounting nuts on the dash panel, then remove the fuel filter, filter bracket, and protector
assembly from the dash panel.

●

It is not necessary to disconnect the fuel hose.

2.

Using a tool such as a pliers, loosen the water draining cock at
the bottom of the fuel filter.
Loosening drain cock four to five turns causes water to
start draining.
Do not remove drain cock by loosening it excessively.
If water dose not drain properly, move the priming up and down.

CAUTION:

When the water is drained, the fuel is also drained. Use a
pan, etc. to avoid fuel adherence to the rubber parts such as
the engine mount insulator.
Do not over-tighten the water draining cock. This will dam-
age the cock thread, resulting in water or fuel leak.

3.

Bleed air of the fuel filter. Refer to

EC-956, "AIR BLEEDING"

.

4.

Start the engine.

Fuel Pump Learning Value Clearing

EBS01380

DESCRIPTION

In order to always keep optimum fuel pressure in fuel rail, the ECM controls fuel pump in high precision with
monitoring the signal of fuel rail pressure sensor.
Accordingly, the ECM always learns characteristic value of fuel pump. Fuel Pump Learning Value Clearing is
an operating to clear the value of the fuel pump learning.
It must be performed after the fuel pump is changed. When the ECM is replaced with brand new one, the Fuel
Pump Learning Value Clearing is not necessary to be performed. If the ECM to be replaced has the possibility
of learning the characteristic value of fuel pump, the Fuel Pump Learning Value Clearing is necessary to be
performed after the ECM has been replaced.

OPERATION PROCEDURE

NOTE:
Remove fuel pump without starting engine after performing Fuel Pump Learning Value Clearing.

SEF375Y

SMA825B

BASIC SERVICE PROCEDURE

EC-957

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1.

Turn ignition switch ON.

2.

Select “PUMP LEARNT CLEAR” in “ACTIVE TEST” mode with
CONSULT-II.

3.

Touch “CLEAR” and wait a few seconds.

4.

Make sure that “CMPLT” is displayed on CONSULT-II screen.

MBIB0896E

MBIB0893E

MBIB0894E

EC-958

[YD (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

ON BOARD DIAGNOSTIC (OBD) SYSTEM

PFP:00028

Introduction

EBS01381

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

The malfunction indicator (MI) on the instrument panel lights up when the same malfunction is detected in
three consecutive trips (Three trip detection logic).

Three Trip Detection Logic and One Trip Detection Logic

EBS01382

On board diagnosis (OBD) system of this vehicle has “Three Trip Detection Logic” and “One Trip Detection
Logic”. For which logic each self-diagnosis corresponds with, refer to

EC-938, "INDEX FOR DTC"

.

“Trip” of “Three Trip Detection Logic” means a driving mode in which the self-diagnosis is performed while

driving.

THREE TRIP DETECTION LOGIC

When a malfunction is detected for the first time, 1st trip DTC is stored in the ECM memory. MI does not illumi-
nate at this stage. <1st trip>
When the same malfunction is detected again during the next driving, 2nd trip DTC is stored in the ECM mem-
ory and 1st trip DTC is cleared from the ECM memory. MI does not illuminate at this stage. <2nd trip>
When the same malfunction is detected again at the third driving, DTC and Freeze Frame Data are stored in
the ECM memory and 2nd trip DTC is cleared from the ECM memory. MI illuminates at the same time when
DTC is stored. <3rd trip>
In other words, DTC and Freeze Frame Data are stored and MI illuminates when the same malfunction occurs
in 3 consecutive trips.
This is called “Three Trip Detection Logic”.

ONE TRIP DETECTION LOGIC

When a malfunction is detected for the first time, DTC and Freeze Frame Data are stored in the ECM memory
and MI lights up. This is called “One Trip Detection Logic”. Some self-diagnoses will not illuminate MI when
DTC is stored. (Refer to

EC-958, "Emission-related Diagnostic Information"

.) 1st/2nd trip DTC is not stored for

one trip detection logic.

Emission-related Diagnostic Information

EBS01383

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

X: Applicable —: Not applicable

Emission-related diagnostic information

ISO Standard

Diagnostic Trouble Code (DTC)

Mode 3 of ISO 15031-5

Freeze Frame data

Mode 2 of ISO 15031-5

1st/2nd Trip Diagnostic Trouble Code (1st/2nd Trip DTC)

Mode 7 of ISO 15031-5

Calibration ID

Mode 9 of ISO 15031-5

DTC

1st trip DTC

2nd trip DTC

Freeze Frame data

CONSULT-II

×

×

×

×

GST

×

×

×

×

Items

(CONSULT-II screen item)

DTC*

1

*

2

(CONSULT-II, GST )

1st/2nd

trip DTC

MI lighting

up

Reference page

CAN COMM CIRCUIT

U1000

—

—

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

—

—

—

CMP/CKP RELATION

P0016

×

×

TC BOOST SOL/CIRC*

3

P0045

×

×

HIGH FUEL PRESS

P0088

×

×

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-959

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FUEL PUMP

P0089

×

×

FUEL LEAK

P0093

×

×

MAF SENSOR

P0101

×

×

MAF SEN/CIRCUIT

P0102

×

×

MAF SEN/CIRCUIT

P0103

×

×

IAT SEN/CIRCUIT

P0112

×

×

IAT SEN/CIRCUIT

P0113

×

×

ECT SEN/CIRCUIT

P0117

×

×

ECT SEN/CIRCUIT

P0118

×

×

APP SEN 1/CIRCUIT

P0122

—

—

APP SEN 1/CIRCUIT

P0123

—

—

FUEL TEMP SEN/CIRC

P0182

×

×

FUEL TEMP SEN/CIRC

P0183

×

×

FRP SEN/CIRC

P0192

×

×

FRP SEN/CIRC

P0193

×

×

INJECTOR

P0200

×

×

CYL1 INJECTOR

P0201

×

×

CYL2 INJECTOR

P0202

×

×

CYL3 INJECTOR

P0203

×

×

CYL4 INJECTOR

P0204

×

×

ENG OVER TEMP

P0217

—

×

APP SEN 2/CIRCUIT

P0222

—

—

APP SEN 2/CIRCUIT

P0223

—

—

TC SYSTEM

P0234

—

—

TC BOOST SEN/CIRC*

3

P0237

×

×

TC BOOST SEN/CIRC*

3

P0238

×

×

CKP SEN/CIRCUIT

P0335

×

×

CKP SENSOR

P0336

×

×

CMP SEN/CIRCUIT

P0340

×

×

CMP SENSOR

P0341

×

×

GLOW RELAY

P0380

×

×

EGR SYSTEM*

3

P0401

×

×

EGR VALVE

P0404

×

×

BATTERY VOLTAGE

P0563

—

—

ECM

P0605

×

×

ECM

P0606

×

×

FUEL PUMP/CIRC

P0628

×

×

FUEL PUMP/CIRC

P0629

×

×

SENSOR PWR/CIRC1

P0642

×

×

SENSOR PWR/CIRC1

P0643

×

×

SENSOR PWR/CIRC2

P0652

×

×

SENSOR PWR/CIRC2

P0653

×

×

ECM RELAY

P0686

—

—

Items

(CONSULT-II screen item)

DTC*

1

*

2

(CONSULT-II, GST )

1st/2nd

trip DTC

MI lighting

up

Reference page

EC-960

[YD (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

*1: 1st trip DTC No. and 2nd trip DTC No. are the same as DTC No.
*2: This number is prescribed by ISO 15031-6.
*3: For YD22DDTi engine models

DTC AND 1ST/2ND TRIP DTC

The number of 1st/2nd trip DTC is the same as the number of DTC.
When a malfunction is detected during 1st trip, 1st trip DTC is stored in the ECM memory. MI does not illumi-
nate at this time. When the same malfunction is detected in the next trip (2nd trip), 2nd trip DTC is stored in the
ECM memory and 1st trip DTC is cleared from the ECM memory. MI does not illuminate at this time. In addi-
tion, DTC is stored in the ECM memory and Mi lights up when the same malfunction is detected during the fol-
lowing consecutive trip (3rd trip).
The procedure for erasing DTC, 1st trip DTC, and 2nd trip DTC from the ECM memory is described in

"HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

.

For malfunctions in which 1st/2nd trip DTC are displayed, Refer to

EC-958, "Emission-related Diagnostic Infor-

.

1st/2nd trip DTC is specified in Mode 7 of ISO15031-5. 1st/2nd trip DTC detection occurs without lighting up
MI and therefore does not warn the driver of a malfunction.
When 1st/2nd trip DTC is detected, check, print out or write down, and erase 1st/2nd trip DTC as specified
with step II of Work Flow, refer to

EC-968, "WORK FLOW"

. Then perform DTC Confirmation Procedure or

Overall Function Check to try to duplicate the malfunction. If the malfunction is duplicated, it is necessary to
investigate the cause again.

How to Read DTC and 1st/2nd Trip DTC

DTC and 1st/2nd trip DTC can be read by the following procedures.

TCS C/U FUNCTN

P1211

—

—

TCS/CIRC

P1212

—

—

INJ ADJ RES/CIRC1

P1260

×

×

INJ ADJ RES/CIRC1

P1261

×

×

INJ ADJ RES/CIRC2

P1262

×

×

INJ ADJ RES/CIRC2

P1263

×

×

INJ ADJ RES/CIRC3

P1264

×

×

INJ ADJ RES/CIRC3

P1265

×

×

INJ ADJ RES/CIRC4

P1266

×

×

INJ ADJ RES/CIRC4

P1267

×

×

INJECTOR 1

P1268

—

—

INJECTOR 2

P1269

—

—

INJECTOR 3

P1270

—

—

INJECTOR 4

P1271

—

—

FRP RELIEF VALVE

P1272

×

×

FUEL PUMP

P1273

×

×

FUEL PUMP

P1274

—

×

FUEL PUMP

P1275

—

×

NATS MALFUNTION

P1610 - P1617

—

—

APP SENSOR

P2135

—

—

INJ PWR/CIRC

P2146

×

×

INJECTOR/CIRC

P2147

×

×

INJECTOR/CIRC

P2148

×

×

INJ PWR/CIRC

P2149

×

×

BARO SEN/CIRC

P2228

×

×

BARO SEN/CIRC

P2229

×

×

Items

(CONSULT-II screen item)

DTC*

1

*

2

(CONSULT-II, GST )

1st/2nd

trip DTC

MI lighting

up

Reference page

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-961

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With CONSULT-II
With GST

ONSULT-II or GST (Generic Scan Tool): Examples: P0117, P0335, P1260, etc.
These numbers are prescribed by ISO 15031-6.
(CONSULT-II also displays the malfunctioning parts and systems.)
A sample of CONSULT-II display for DTC and 1st/2nd trip DTC is
shown in the figure. DTC and 1st/2nd trip DTC are displayed in the
“SELF-DIAG RESULTS” mode of CONSULT-II.
“TIME” data shows how many times the vehicle was driven after the
last detection of DTC or 1st/2nd trip DTC. When DTC or 1st/2nd trip
DTC has been detected currently, “TIME” becomes “0”.

●

CONSULT-II displays for DTC and 1st/2nd trip DTC become the
same.

●

The output of a DTC indicates a malfunction. However, GST
does not indicate whether the malfunction is still occurring or
has occurred in the past and has returned to normal. CONSULT-
II can identify the malfunction status. Therefore the use of CON-
SULT-II (If available) is recommended.

FREEZE FRAME DATA

ECM records driving conditions such as calculated load value, engine coolant temperature, engine speed,
vehicle speed, and intake manifold pressure at the moment a malfunction is detected.
The data stored together with DTC is called Freeze Frame Data, and is displayed on CONSULT-II or GST.
When 1st/2nd trip DTC is detected, Freeze Frame Data is not recorded.
Only a set of Freeze Frame Data can be stored in the ECM memory. When ECM records Freeze Frame Data,
and another Freeze Frame Data is generated after that, the first (original) Freeze Frame Data is not updated in
ECM and it remains.
When the DTC is erased from ECM memory, Freeze Frame Data is erased with DTC. The procedure for eras-
ing DTC is described in

EC-961, "How to Erase DTC"

.

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 5
seconds and then turn it ON (engine stopped) again.

2.

Touch “ENGINE”.

3.

Touch “SELF-DIAG RESULTS”.

PBIB2022E

EC-962

[YD (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

4.

Touch “ERASE”. (The DTC in the ECM will be erased.)

With GST

The emission related diagnostic information in the ECM can be erased by selecting MODE 4 with GST.

1.

If the ignition switch stays ON after repair work, be sure to turn ignition switch OFF once. Wait at least 5
seconds and then turn it ON (engine stopped) again.

2.

Select MODE 4 with GST (Generic Scan Tool).

●

If the battery is disconnected, the emission-related diagnostic information will be lost within 24
hours.

●

The following data are cleared when the ECM memory is erased.

–

Diagnostic trouble codes

–

1st trip diagnostic trouble codes

–

2nd trip diagnostic trouble codes

–

Freeze frame data

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)

EBS01384

●

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 EL-352, “NATS (NISSAN ANTI-THEFT SYSTEM)”.

●

Confirm no self-diagnostic results of NATS is displayed
before touching “ERASE” in “SELF-DAIG 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 procedure of NATS initialization and NATS ignition key ID registration, refer to CON-
SULT-II operation manual, NATS.

MBIB0895E

SEF543X

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-963

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Malfunction Indicator (MI)

EBS01385

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 EL-115, “WARNING
LAMPS” or see

EC-1250, "MI & DATA LINK CONNECTORS"

.

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 two functions.

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 EL-
115, “WARNING LAMPS” or see

EC-1250, "MI & DATA LINK CONNECTORS"

.

Diagnostic Test Mode I - Malfunction Warning

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. (See

1250, "MI & DATA LINK CONNECTORS"

.)

Engine running

MALFUNCTION
WARNING

This is a usual driving condition. When ECM detects a mal-
function, the MI will light up to inform the driver that a mal-
function has been detected.

MI

Condition

ON

When the malfunction is detected or the ECM's CPU is malfunctioning.

OFF

No malfunction.

EC-964

[YD (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

OBD System Operation Chart

EBS01386

RELATIONSHIP BETWEEN MI, 1ST/2ND TRIP DTC, DTC, AND DETECTABLE ITEMS

●

When the malfunction is detected for the first time, 1st trip DTC is stored in the ECM memory.

●

When the same malfunction is detected during 2nd consecutive trip, 2nd trip DTC is stored and 1st trip
DTC is cleared.

●

When the same malfunction is detected during 3rd consecutive trip, DTC and Freeze Frame Data are
stored and MI illuminates. Refer to

EC-958, "Three Trip Detection Logic and One Trip Detection Logic"

for

details.1st/2nd trip DTC are cleared from the ECM memory.

●

MI will go off after the vehicle is driven 3 consecutive times with no malfunction (driving pattern A).

●

1st/2nd trip DTC, DTC, and Freeze Frame Data will be stored until the vehicle is driven 41 times (driving
pattern B) without the same malfunction recurring. “TIME” data displayed in the “SELF-DIAG RESULTS”
mode of CONSULT-II shows the number of times the vehicle is driven without the same malfunction recur-
ring.

SUMMARY CHART

Refer to

for details of pattern A and B.

Items

Trip

Counter

Driving Pattern

MI (goes off)

3

2

A

DTC, Freeze Frame Data (clear)

41

40

B

1st/2nd Trip DTC (clear)

41

40

B

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-965

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RELATIONSHIP BETWEEN MI, DTC, 1ST/ 2NDTRIP DTC AND DRIVING PATTERNS

*1: CONSULT-II displays for DTC and

1st/2nd trip DTC become the same.

*2: 1st/2nd trip DTC becomes the same

display in mode7 of GST.

*3: When the same malfunction is

detected in three consecutive trips,
MI will light up.

*4: MI will go off after vehicle is driven 3

times (pattern A) without any mal-
functions.

*5: When the malfunction is detected for

the first time, 1st trip DTC is stored in
the ECM memory.

*6: When the same malfunction is

detected during 2nd consecutive trip,
2nd trip DTC is stored and 1st trip
DTC is cleared.

*7: When the same malfunction is

detected during 3rd consecutive trip,
DTC and Freeze Frame Data are
stored.

*8: The DTC and the freeze frame data

will not be displayed any longer after
vehicle is driven 41 times (pattern B)
without the same malfunction.

PBIB2048E

EC-966

[YD (WITH EURO-OBD)]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

<Driving Pattern A>

Driving pattern A means the vehicle operation as follows:
Engine speed should go over 500 rpm at least 5 seconds and the DTC Confirmation Procedure is performed.

●

The A counter will be cleared when the same malfunction is detected.

●

The A counter will be counted up when the same malfunction is not detected.

●

The MI will go off when the A counter reaches 3.

<Driving Pattern B>

Driving pattern B means the vehicle operation as follows:
Driving pattern A and (1)-(3) are satisfied.

●

The B counter will be cleared when the same malfunction is detected.

●

The B counter will be counted up when the same malfunction is not detected.

●

The DTC will not be displayed after the B counter reaches 40.

PBIB2049E

TROUBLE DIAGNOSIS

EC-967

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TROUBLE DIAGNOSIS

PFP:00004

Trouble Diagnosis Introduction

EBS01387

INTRODUCTION

The engine has an ECM to control major systems such as fuel injec-
tion control, fuel injection timing control, glow control system, etc.
The ECM accepts input signals from sensors and instantly actuators.
It is essential that both input and output signals are proper and sta-
ble. At the same time, it is important that there are no malfunctions
such as vacuum leaks, or other malfunctions with the engine.

It is much more difficult to diagnose a malfunction that occurs inter-
mittently rather than continuously. Most intermittent malfunctions 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 incidents. A road
test with CONSULT-II or a circuit tester connected should be per-
formed. Follow the

EC-968, "WORK FLOW"

.

Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on next page should be used.
Start your diagnosis by looking for conventional incidents first. This
will help troubleshoot driveability incidents on an electronically con-
trolled engine vehicle.

MEF036D

SEF233G

SEF234G

EC-968

[YD (WITH EURO-OBD)]

TROUBLE DIAGNOSIS

WORK FLOW

*1

If time data of “SELF-DIAG
RESULTS” is other than “0”, perform

EC-1002, "TROUBLE DIAGNOSIS
FOR INTERMITTENT INCIDENT"

.

*2

If the incident cannot be verified, per-
form

EC-1002, "TROUBLE DIAGNO-

SIS FOR INTERMITTENT
INCIDENT"

.

*3

If the on board diagnostic system
cannot be performed, check main
power supply and ground circuit.
Refer to

EC-1003, "MAIN POWER

SUPPLY AND GROUND CIRCUIT"

.

*4

If malfunctioning part cannot be
detected, perform

EC-1002, "TROU-

BLE DIAGNOSIS FOR INTERMIT-
TENT INCIDENT"

.

PBIB2047E

TROUBLE DIAGNOSIS

EC-969

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Description for Work Flow

DIAGNOSTIC WORK SHEET

There are many operating conditions that lead to the malfunction of
engine components. A good grasp of such conditions can make trou-
bleshooting faster and more accurate.
In general, each customer feels differently about an incident. It is
important to fully understand the symptoms or conditions for a cus-
tomer complaint.
Utilize a diagnostic worksheet like the one shown below in order to
organize all the information for troubleshooting.

STEP

DESCRIPTION

STEP I

Get detailed information about the conditions and the environment when the incident/symptom occurred using the

EC-969, "DIAGNOSTIC WORK SHEET"

.

STEP II

Before confirming the concern, check and write down (print out using CONSULT-II or GST) the (1st/2nd trip) DTC and
the freeze frame data (When 1st/2nd trip DTC is detected, Freeze Frame Data is not recorded.), then erase the DTC
and the data. (Refer to

EC-961, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

.) The (1st/

2nd trip) DTC and the freeze frame data can be used when duplicating the incident at STEP III & IV.
If the incident cannot be verified, perform

EC-1002, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

Study the relationship between the cause, specified by (1st/2nd trip) DTC, and the symptom described by the cus-
tomer. (The Symptom Matrix Chart will be useful. See

.)

Also check related service bulletins for information.

STEP III

Try to confirm the symptom and under what conditions the incident occurs.
The DIAGNOSTIC WORK SHEET and the freeze frame data are useful to verify the incident. Connect CONSULT-II
to the vehicle in “DATA MONITOR (AUTO TRIG)” mode and check real time diagnosis results.
If the incident cannot be verified, perform

EC-1002, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

If the malfunction code is detected, skip STEP IV and perform STEP V.

STEP IV

Try to detect the (1st/2nd trip) DTC by driving in (or performing) the DTC Confirmation Procedure. Check and read
the (1st/2nd trip) DTC and freeze frame data by using CONSULT-II or GST.
During the (1st/2nd trip) DTC verification, be sure to connect CONSULT-II to the vehicle in “DATA MONITOR (AUTO
TRIG)” mode and check real time diagnosis results.
If the incident cannot be verified, perform

EC-1002, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCIDENT"

.

In case the DTC Confirmation Procedure is not available, perform the Overall Function Check instead. The (1st/2nd
trip) DTC cannot be displayed by this check, however, this simplified check is an effective alternative.
The NG result of the Overall Function Check is the same as the (1st/2nd trip) DTC detection.

STEP V

Take the appropriate action based on the results of STEP I through IV.
If the malfunction code is indicated, proceed to TROUBLE DIAGNOSIS FOR DTC PXXXX.
If the normal code is indicated, proceed to the BASIC INSPECTION. (Refer to

.)Then perform inspections

according to the Symptom Matrix Chart. (Refer to

.)

STEP VI

Identify where to begin diagnosis based on the relationship study between symptom and possible causes. Inspect the
system for mechanical binding, loose connectors or wiring damage using (tracing) Harness Layouts.
Gently shake the related connectors, components or wiring harness with CONSULT-II set in “DATA MONITOR
(AUTO TRIG)” mode.
Check the voltage of the related ECM terminals or monitor the output data from the related sensors with CONSULT-II.
Refer to

EC-984, "ECM Terminals And Reference Value"

,

EC-999, "CONSULT-II Reference Value in Data Monitor

.

The Diagnostic Procedure in EC section contains a description based on open circuit inspection. A short circuit
inspection is also required for the circuit check in the Diagnostic Procedure. For details, refer to Circuit Inspection in
GI-21, “HOW TO PERFOPRM EFFICIENT DIAGNOSES FOR AN ELECTRICAL INCIDENT”.
Repair or replace the malfunction parts.
If malfunctioning part cannot be detected, perform

EC-1002, "TROUBLE DIAGNOSIS FOR INTERMITTENT INCI-

.

STEP VII

Once you have repaired the circuit or replaced a component, you need to run the engine in the same conditions and
circumstances which resulted in the customer's initial complaint.
Perform the DTC Confirmation Procedure and confirm the normal code [DTC No. P0000] is detected. If the incident is
still detected in the final check, perform STEP VI by using a method different from the previous one.
Before returning the vehicle to the customer, be sure to erase the unnecessary (already fixed) (1st/2nd trip) DTC in
ECM. (Refer to

EC-961, "HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION"

.)

SEF907L

EC-970

[YD (WITH EURO-OBD)]

TROUBLE DIAGNOSIS

Worksheet Sample

DTC Inspection Priority Chart

EBS01388

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.

NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to

EC-1011, "DTC U1000 CAN COMMUNICATION LINE"

.

MTBL0533

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