Infiniti I30. Emission Control System (2003 year). Manual — part 6

SEF935Z

How to Set SRT Code

NHEC0031S0302

To set all SRT codes, self-diagnosis for the items indicated above must be performed one or more times. Each
diagnosis may require a long period of actual driving under various conditions.

With CONSULT-II

Perform corresponding DTC Confirmation Procedure one by one based on “Performance Priority” in the table
on EC-78.

Without CONSULT-II

The most efficient driving pattern in which SRT codes can be properly set is explained on the next page. The
driving pattern should be performed one or more times to set all SRT codes.

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-81

Driving Pattern

NHEC0031S0303

SEC390D

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-82

쐌

The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driv-
ing habits, etc.
Zone A refers to the range where the time required, for the diagnosis under normal conditions*, is the
shortest.
Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed
within zone A.

*: Normal conditions refer to the following:
−

Sea level

−

Flat road

−

Ambient air temperature: 20 - 30°C (68 - 86°F)

−

Diagnosis is performed as quickly as possible under normal conditions.
Under different conditions [For example: ambient air temperature other than 20 - 30°C (68 - 86°F)], diag-
nosis may also be performed.

Pattern 1:

쐌

The engine is started at the engine coolant temperature of −10 to 35°C (14 to 95°F)
(where the voltage between the ECM terminal 93 and ground is 3.0 - 4.3V).

쐌

The engine must be operated at idle speed until the engine coolant temperature is greater than 70°C
(158°F) (where the voltage between the ECM terminal 93 and ground is lower than 1.4V).

쐌

The engine is started at the fuel tank temperature of warmer than 0°C (32°F) (where the voltage
between the ECM terminal 75 and ground is less than 4.1V).

Pattern 2:

쐌

When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.
In this case, the time required for diagnosis may be extended.

Pattern 3:

쐌

The driving pattern outlined in *2 must be repeated at least 3 times.

Pattern 4:

쐌

Tests are performed after the engine has been operated for at least 17 minutes.

쐌

The accelerator pedal must be held very steady during steady-state driving.

쐌

If the accelerator pedal is moved, the test must be conducted all over again.

*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56 MPH), then release the accelerator pedal
and keep it released for more than 10 seconds. Depress the accelerator pedal until vehicle speed is 90 km/h
(56 MPH) again.
*2: Operate the vehicle in the following driving pattern.
1) Decelerate vehicle to 0 km/h (0 MPH) and let engine idle.
2) Repeat driving pattern shown below at least 10 times.

쐌

During acceleration, hold the accelerator pedal as steady as possible.

SEF414S

*3: Checking the vehicle speed with GST is advised.
Suggested Transmission Gear Position
Set the selector lever in the “D” position with the overdrive switch turned ON.

TEST VALUE AND TEST LIMIT (GST ONLY — NOT APPLICABLE TO CONSULT-II)

NHEC0031S04

The following is the information specified in Mode 6 of SAE J1979.
The test value is a parameter used to determine whether a system/circuit diagnostic test is “OK” or “NG” while
being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-83

maximum or minimum value and is compared with the test value being monitored.
Items for which these data (test value and test limit) are displayed are the same as SRT code items (30 test
items).
These data (test value and test limit) are specified by Test ID (TID) and Component ID (CID) and can be dis-
played on the GST screen.

X: Applicable

—: Not applicable

SRT item

Self-diagnostic test item

Test value (GST display)

Test limit

Application

TID

CID

CATALYST

Three way catalyst function

(Bank 1)

01H

01H

Max.

X

Three way catalyst function

(Bank 2)

03H

02H

Max.

X

EVAP SYSTEM

EVAP control system

(Small leak)

05H

03H

Max.

X

EVAP control system purge flow

monitoring

06H

83H

Min.

X

HO2S

Heated oxygen sensor 1 (bank 1)

09H

04H

Max.

X

0AH

84H

Min.

X

0BH

04H

Max.

X

0CH

04H

Max.

X

0DH

04H

Max.

X

Heated oxygen sensor 1 (bank 2)

11H

05H

Max.

X

12H

85H

Min.

X

13H

05H

Max.

X

14H

05H

Max.

X

15H

05H

Max.

X

Heated oxygen sensor 2 (bank 1)

19H

86H

Min.

X

1AH

86H

Min.

X

1BH

06H

Max.

X

1CH

06H

Max.

X

Heated oxygen sensor 2 (bank 2)

21H

87H

Min.

X

22H

87H

Min.

X

23H

07H

Max.

X

24H

07H

Max.

X

HO2S HTR

Heated oxygen sensor 1 heater

(bank 1)

29H

08H

Max.

X

2AH

88H

Min.

X

Heated oxygen sensor 1 heater

(bank 2)

2BH

09H

Max.

X

2CH

89H

Min.

X

Heated oxygen sensor 2 heater

(bank 1)

2DH

0AH

Max.

X

2EH

8AH

Min.

X

Heated oxygen sensor 2 heater

(bank 2)

2FH

0BH

Max.

X

30H

8BH

Min.

X

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-84

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

NHEC0031S05

X: Applicable

—: Not applicable

Items

(CONSULT-II screen terms)

DTC*1

SRT code

Test value/

Test limit

(GST only)

1st trip
DTC*1

Reference

page

CONSULT-II

GST*2

ECM*3

CAN COMM CIRCUIT

U1000

1000*6

—

—

—

EC-159

CAN COMM CIRCUIT

U1001

1001*6

—

—

X

EC-159

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

0000

—

—

—

—

INT/V TIM CONT-B1

P0011

0011

—

—

X

EC-162

INT/V TIM CONT-B2

P0021

0021

—

—

X

EC-162

HO2S1 HTR (B1)

P0031

0031

X

X

X*5

EC-171

HO2S1 HTR (B1)

P0032

0032

X

X

X*5

EC-171

HO2S2 HTR (B1)

P0037

0037

X

X

X*5

EC-178

HO2S2 HTR (B1)

P0038

0038

X

X

X*5

EC-178

HO2S1 HTR (B2)

P0051

0051

X

X

X*5

EC-171

HO2S1 HTR (B2)

P0052

0052

X

X

X*5

EC-171

HO2S2 HTR (B2)

P0057

0057

X

X

X*5

EC-178

HO2S2 HTR (B2)

P0058

0058

X

X

X*5

EC-178

MAF SEN/CIRCUIT

P0101

0101

—

—

—

EC-184

MAF SEN/CIRCUIT

P0102

0102

—

—

—

EC-191

MAF SEN/CIRCUIT

P0103

0103

—

—

—

EC-191

ABSL PRES SEN/CIRC

P0107

0107

—

—

X

EC-197

ABSL PRES SEN/CIRC

P0108

0108

—

—

X

EC-197

IAT SEN/CIRCUIT

P0112

0112

—

—

X

EC-199

IAT SEN/CIRCUIT

P0113

0113

—

—

X

EC-199

ECT SEN/CIRC

P0117

0117

—

—

—

EC-203

ECT SEN/CIRC

P0118

0118

—

—

—

EC-203

TP SEN 2/CIRC

P0122

0122

—

—

—

EC-208

TP SEN 2/CIRC

P0123

0123

—

—

—

EC-208

ECT SENSOR

P0125

0125

—

—

—

EC-214

IAT SENSOR

P0127

0127

—

—

X

EC-217

THERMSTAT FNCTN

P0128

0128

—

—

X

EC-219

HO2S1 (B1)

P0132

0132

X

X

X*5

EC-221

HO2S1 (B1)

P0133

0133

X

X

X*5

EC-229

HO2S1 (B1)

P0134

0134

X

X

X*5

EC-241

HO2S2 (B1)

P0138

0138

X

X

X*5

EC-250

HO2S2 (B1)

P0139

0139

X

X

X*5

EC-258

HO2S1 (B2)

P0152

0152

X

X

X*5

EC-221

HO2S1 (B2)

P0153

0153

X

X

X*5

EC-229

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-85

Items

(CONSULT-II screen terms)

DTC*1

SRT code

Test value/

Test limit

(GST only)

1st trip
DTC*1

Reference

page

CONSULT-II

GST*2

ECM*3

HO2S1 (B2)

P0154

0154

X

X

X*5

EC-241

HO2S2 (B2)

P0158

0158

X

X

X*5

EC-250

HO2S2 (B2)

P0159

0159

X

X

X*5

EC-258

FUEL SYS-LEAN-B1

P0171

0171

—

—

X

EC-267

FUEL SYS-RICH-B1

P0172

0172

—

—

X

EC-275

FUEL SYS-LEAN-B2

P0174

0174

—

—

X

EC-267

FUEL SYS-RICH-B2

P0175

0175

—

—

X

EC-275

FTT SENSOR

P0181

0181

—

—

X

EC-282

FTT SEN/CIRCUIT

P0182

0182

—

—

X

EC-285

FTT SEN/CIRCUIT

P0183

0183

—

—

X

EC-285

TP SEN 1/CIRC

P0222

0222

—

—

—

EC-290

TP SEN 1/CIRC

P0223

0223

—

—

—

EC-290

MULTI CYL MISFIRE

P0300

0300

—

—

X

EC-296

CYL 1 MISFIRE

P0301

0301

—

—

X

EC-296

CYL 2 MISFIRE

P0302

0302

—

—

X

EC-296

CYL 3 MISFIRE

P0303

0303

—

—

X

EC-296

CYL 4 MISFIRE

P0304

0304

—

—

X

EC-296

CYL 5 MISFIRE

P0305

0305

—

—

X

EC-296

CYL 6 MISFIRE

P0306

0306

—

—

X

EC-296

KNOCK SEN/CIRC-B1

P0327

0327

—

—

X

EC-305

KNOCK SEN/CIRC-B1

P0328

0328

—

—

X

EC-305

CKP SEN/CIRCUIT

P0335

0335

—

—

X

EC-310

CMP SEN/CIRCUIT

P0340

0340

—

—

X

EC-317

CMP SEN/CIRC-B2

P0345

0345

—

—

X

EC-317

TW CATALYST SYS-B1

P0420

0420

X

X

X*5

EC-326

TW CATALYST SYS-B2

P0430

0430

X

X

X*5

EC-326

EVAP PURG FLOW/MON

P0441

0441

X

X

X*5

EC-331

EVAP SMALL LEAK

P0442

0442

X

X

X*5

EC-341

PURG VOLUME CONT/V

P0444

0444

—

—

X

EC-356

PURG VOLUME CONT/V

P0445

0445

—

—

X

EC-356

VENT CONTROL VALVE

P0447

0447

—

—

X

EC-363

EVAP SYS PRES SEN

P0452

0452

—

—

X

EC-370

EVAP SYS PRES SEN

P0453

0453

—

—

X

EC-376

EVAP GROSS LEAK

P0455

0455

—

X

X*5

EC-385

EVAP VERY SML LEAK

P0456

0456

X*4

X

X*5

EC-397

FUEL LEV SEN SLOSH

P0460

0460

—

—

X

EC-412

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-86

Items

(CONSULT-II screen terms)

DTC*1

SRT code

Test value/

Test limit

(GST only)

1st trip
DTC*1

Reference

page

CONSULT-II

GST*2

ECM*3

FUEL LEVEL SENSOR

P0461

0461

—

—

X

EC-416

FUEL LEVL SEN/CIRC

P0462

0462

—

—

X

EC-418

FUEL LEVL SEN/CIRC

P0463

0463

—

—

X

EC-418

VEH SPEED SEN/CIRC*7

P0500

0500

—

—

X

EC-422

ISC SYSTEM

P0506

0506

—

—

X

EC-426

ISC SYSTEM

P0507

0507

—

—

X

EC-428

PW ST P SEN/CIRC

P0550

0550

—

—

X

EC-430

ECM

P0605

0605

—

—

X

EC-435

MIL/CIRC

P0650

0650

—

—

X

EC-437

PNP SW/CIRC

P0705

0705

—

—

X

AT-109

ATF TEMP SEN/CIRC

P0710

0710

—

—

X

AT-115

VEH SPD SEN/CIR AT*7

P0720

0720

—

—

X

AT-121

ENGINE SPEED SIG

P0725

0725

—

—

X

AT-126

A/T 1ST GR FNCTN

P0731

0731

—

—

X

AT-131

A/T 2ND GR FNCTN

P0732

0732

—

—

X

AT-137

A/T 3RD GR FNCTN

P0733

0733

—

—

X

AT-143

A/T 4TH GR FNCTN

P0734

0734

—

—

X

AT-149

TCC SOLENOID/CIRC

P0740

0740

—

—

X

AT-158

A/T TCC S/V FNCTN

P0744

0744

—

—

X

AT-163

L/PRESS SOL/CIRC

P0745

0745

—

—

X

AT-173

SFT SOL A/CIRC

P0750

0750

—

—

—

AT-179

SFT SOL B/CIRC

P0755

0755

—

—

—

AT-184

ECM BACK UP/CIRCUIT

P1065

1065

—

—

X

EC-441

MAF SENSOR

P1102

1102

—

—

—

EC-445

ETC ACTR

P1121

1121

—

—

—

EC-451

ETC FUNCTION/CIRC

P1122

1122

—

—

—

EC-453

ETC MOT PWR

P1124

1124

—

—

—

EC-461

ETC MOT PWR

P1126

1126

—

—

—

EC-461

ETC MOT

P1128

1128

—

—

—

EC-467

HO2S1 (B1)

P1143

1143

X

X

X*5

EC-472

HO2S1 (B1)

P1144

1144

X

X

X*5

EC-479

HO2S2 (B1)

P1146

1146

X

X

X*5

EC-486

HO2S2 (B1)

P1147

1147

X

X

X*5

EC-495

CLOSED LOOP-B1

P1148

1148

—

—

—

EC-504

HO2S1 (B2)

P1163

1163

X

X

X*5

EC-472

HO2S1 (B2)

P1164

1164

X

X

X*5

EC-479

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-87

Items

(CONSULT-II screen terms)

DTC*1

SRT code

Test value/

Test limit

(GST only)

1st trip
DTC*1

Reference

page

CONSULT-II

GST*2

ECM*3

HO2S2 (B2)

P1166

1166

X

X

X*5

EC-486

HO2S2 (B2)

P1167

1167

X

X

X*5

EC-495

CLOSED LOOP-B2

P1168

1168

—

—

—

EC-504

TCS C/U FUNCTN

P1211

1211

—

—

X

EC-506

TCS/CIRC

P1212

1212

—

—

X

EC-508

ENG OVER TEMP

P1217

1217

—

—

—

EC-510

CTP LEARNING

P1225

1225

—

—

X

EC-528

CTP LEARNING

P1226

1226

—

—

X

EC-530

SENSOR POWER/CIRC

P1229

1229

—

—

—

EC-532

PURG VOLUME CONT/V

P1444

1444

—

—

X

EC-538

VENT CONTROL VALVE

P1446

1446

—

—

X

EC-551

VENT CONTROL VALVE

P1448

1448

—

—

X

EC-559

EVAP VERY SML LEAK

P1456

1456

X*4

X

X*5

EC-568

FUEL LEVL SEN/CIRC

P1464

1464

—

—

X

EC-584

VC/V BYPASS/V

P1490

1490

—

—

X

EC-587

VC CUT/V BYPASS/V

P1491

1491

—

—

X

EC-593

ASCD SW

P1564

1564

—

—

—

EC-605

ASCD BRAKE SW

P1572

1572

—

—

—

EC-612

ASCD VHL SPD SEN

P1574

1574

—

—

—

EC-622

NATS MALFUNCTION

P1610-

P1615

1610-1615

—

—

X

EL-375

TP SEN/CIRC A/T

P1705

1705

—

—

—

AT-189

P-N POS SW/CIRCUIT

P1706

1706

—

—

X

EC-627

O/R CLTCH SOL/CIRC

P1760

1760

—

—

X

AT-196

VIAS S/V CIRC

P1800

1800

—

—

X

EC-632

BRAKE SW/CIRCUIT

P1805

1805

—

—

X

EC-637

APP SEN 1/CIRC

P2122

2122

—

—

—

EC-643

APP SEN 1/CIRC

P2123

2123

—

—

—

EC-643

APP SEN 2/CIRC

P2127

2127

—

—

—

EC-650

APP SEN 2/CIRC

P2128

2128

—

—

—

EC-650

TP SENSOR

P2135

2135

—

—

—

EC-656

APP SENSOR

P2138

2138

—

—

—

EC-662

*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: SRT code will not be set if the self-diagnostic result is NG.
*5: This is not displayed with GST.
*6: The troubleshooting for this DTC needs CONSULT-II.
*7: When the fail-safe operations for both self-diagnoses occur at the same time, the MIL illuminates.
NOTE:

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-88

Regarding I35 models, “-B1” indicates bank 1 and “-B2” indicates bank 2.

HOW TO ERASE EMISSION-RELATED DIAGNOSTIC INFORMATION

NHEC0031S06

How to Erase DTC (

With CONSULT-II)

NHEC0031S0601

NOTE:
If the DTC is not for A/T related items (see EC-9), skip steps 2 through 4.
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. Turn CONSULT-II “ON” and touch “A/T”.
3. Touch “SELF-DIAG RESULTS”.
4. Touch “ERASE”. [The DTC in the TCM (Transmission control module) will be erased.] Then touch “BACK”

twice.

5. Touch “ENGINE”.
6. Touch “SELF-DIAG RESULTS”.
7. Touch “ERASE”. (The DTC in the ECM will be erased.)

쐌

If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased
individually from the ECM and TCM (Transmission control module).

SAT859K

The emission related diagnostic information in the ECM can be erased by selecting “ERASE” in the “SELF-
DIAG RESULTS” mode with CONSULT-II.
If DTCs are displayed for both ECM and TCM (Transmission control module), they need to be erased indi-
vidually from the ECM and TCM (Transmission control module).

How to Erase DTC (

With GST)

NHEC0031S0602

NOTE:
If the DTC is not for A/T related items (see EC-9), skip step 2.

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-89

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. Perform “How to Erase DTC (with GST)”, AT-40. (The DTC in TCM will be erased.)
3. Select Mode 4 with GST (Generic Scan Tool).

How to Erase DTC (

No Tools)

NHEC0031S0604

NOTE:
If the DTC is not for A/T related items (see EC-9), skip step 2.
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. Perform “How to Erase DTC (No Tools)”, AT-40. (The DTC in TCM will be erased.)
3. Change the diagnostic test mode from Mode II to Mode I by depressing the accelerator pedal. Refer to

EC-92, “HOW TO SWITCH DIAGNOSTIC MODE”.

쐌

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

쐌

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

1) Diagnostic trouble codes
2) 1st trip diagnostic trouble codes
3) Freeze frame data
4) 1st trip freeze frame data
5) System readiness test (SRT) codes
6) Test values
7) 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.

IVIS (INFINITI VEHICLE IMMOBILIZER SYSTEM — NATS)

NHEC0031S08

SEF515Y

쐌

If the security indicator lights up with the ignition switch in the “ON” position or “NATS MALFUNC-
TION” is displayed on “SELF-DIAG RESULTS” screen, perform self-diagnostic results mode with
CONSULT-II using IVIS program card. Refer to “IVIS (Infiniti Vehicle Immobilizer System — NATS)”
EL-375.

쐌

Confirm no self-diagnostic results of IVIS (NATS) is displayed before touching “ERASE” in “SELF-
DIAG RESULTS” mode with CONSULT-II.

쐌

When replacing ECM, initialization of IVIS (NATS) system and registration of all IVIS (NATS) igni-
tion 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 IVIS (NATS)
initialization and IVIS (NATS) ignition key ID registration, refer to CONSULT-II operation manual,
IVIS/NVIS.

Malfunction Indicator Lamp (MIL)

NHEC1189

DESCRIPTION

NHEC1189S01

The MIL is located on the instrument panel.
1. The MIL will light up when the ignition switch is turned ON without the engine running. This is a bulb check.

쐌

If the MIL does not light up, refer to “WARNING LAMPS”, EL-150 or see DTC P0650 MIL (CIRCUIT), EC-437.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Emission-related Diagnostic Information (Cont’d)

EC-90

2. When the engine is started, the MIL should go off. If the MIL remains on, the on board diagnostic system

has detected an engine system malfunction.

SEF217U

ON BOARD DIAGNOSTIC SYSTEM FUNCTION

NHEC1189S02

The on board diagnostic system has the following four functions.

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 MIL bulb for damage (blown,
open circuit, etc.).
If the MIL does not come on, check MIL 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 MIL will light up to inform the driver
that a malfunction has been detected. The following mal-
functions will light up or blink the MIL in the 1st trip.

쐌

“Misfire (Possible three way catalyst damage)”

쐌

“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.

MIL Flashing without DTC

NHEC1189S0201

If the ECM is in Diagnostic Test Mode II, MIL may flash when engine is running. In this case, check ECM
diagnostic test mode. How to Switch Diagnostic Test Mode.
How to switch the diagnostic test (function) modes, and details of the above functions are described later. How
to Switch Diagnostic Test Mode.
The following emission-related diagnostic information is cleared when the ECM memory is erased.
1. Diagnostic trouble codes
2. 1st trip diagnostic trouble codes
3. Freeze frame data
4. 1st trip freeze frame data
5. System readiness test (SRT) codes

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

EC-91

6. Test values
7. Others

HOW TO SWITCH DIAGNOSTIC TEST MODE

NHEC1189S03

NOTE:

쐌

It is better to count the time accurately with a clock.

쐌

It is impossible to switch the diagnostic mode when an accelerator pedal position sensor circuit
has a malfunction.

쐌

Always ECM returns to Diagnostic Test Mode I after ignition switch is turned “OFF”.

How to Set Diagnostic Test Mode II (Self-diagnostic Results)

NHEC1189S0301

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.
1) Fully depress the accelerator pedal.
2) Fully release the accelerator pedal.
3. Wait 7 seconds, fully depress the accelerator pedal and keep it for approx. 10 seconds until the MIL starts

blinking.

4. Fully release the accelerator pedal.

ECM has entered to Diagnostic Test Mode II (Self-diagnostic results).

PBIB0092E

How to Set Diagnostic Test Mode II (Heated Oxygen Sensor 1 Monitor)

NHEC1189S0302

1. Set the ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to 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.

How to Set Diagnostic Switch Monitored Sensor from Bank 1 to Bank 2 or Vice versa

NHEC1189S0303

1. Fully depress the accelerator pedal quickly and then release it immediately.
2. Make sure that monitoring sensor has changed by MIL blinking as follows.

PBIB0093E

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

NHEC1189S0304

1. Set ECM in Diagnostic Test Mode II (Self-diagnostic results). Refer to 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 diagnos-

tic information has been erased from the backup memory in the ECM.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

EC-92

3. Fully release the accelerator pedal, and confirm the DTC 0000 is displayed.

DIAGNOSTIC TEST MODE I — BULB CHECK

NHEC1189S04

In this mode, the MIL on the instrument panel should stay ON. If it remains OFF, check the bulb. Refer to
“WARNING LAMPS”, EL-150 or see DTC P0650 MIL (CIRCUIT), EC-437.

DIAGNOSTIC TEST MODE I — MALFUNCTION WARNING

NHEC1189S05

MIL

Condition

ON

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

OFF

No malfunction.

쐌

These DTC numbers are clarified in Diagnostic Test Mode II (SELF-DIAGNOSTIC RESULTS)

DIAGNOSTIC TEST MODE II — SELF-DIAGNOSTIC RESULTS

NHEC1189S06

In this mode, the DTC and 1st trip DTC are indicated by the number of blinks of the MIL as shown below.
The DTC and 1st trip DTC are displayed at the same time. If the MIL 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
MIL illuminates in diagnostic test mode II (SELF-DIAGNOSTIC RESULTS), it is a DTC; if two or more codes
are displayed, 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 or GST. A DTC will be used as an example for
how to read a code.

SEF952W

A particular trouble code can be identified by the number of four-digit numeral flashes. The “zero” is indicated
by the number of ten flashes. The length of time the 1,000th-digit numeral flashes on and off is 1.2 seconds
consisting of an ON (0.6-second) - OFF (0.6-second) cycle.
The 100th-digit numeral and lower digit numerals consist of a 0.3-second ON and 0.3-second OFF cycle.
A change from one digit numeral to another occurs at an interval of 1.0-second OFF. In other words, the later
numeral appears on the display 1.3 seconds after the former numeral has disappeared.
A change from one trouble code to another occurs at an interval of 1.8-second OFF.
In this way, all the detected malfunctions are classified by their DTC numbers. The DTC “0000” refers to no
malfunction. (See “TROUBLE DIAGNOSIS — INDEX”, EC-9.)

How to Erase Diagnostic Test Mode II (Self-diagnostic Results)

NHEC1189S0601

The DTC can be erased from the back up memory in the ECM by depressing accelerator pedal. Refer to How
to Switch Diagnostic Test Mode.

쐌

If the battery is disconnected, the DTC will be lost from the backup memory after within 24 hours.

쐌

Be careful not to erase the stored memory before starting trouble diagnoses.

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

EC-93

DIAGNOSTIC TEST MODE II — HEATED OXYGEN SENSOR 1 MONITOR

NHEC1189S07

In this mode, the MIL displays the condition of the fuel mixture (lean or rich) which is monitored by the heated
oxygen sensor 1.

MIL

Fuel mixture condition in the exhaust gas

Air fuel ratio feedback control condition

ON

Lean

Closed loop system

OFF

Rich

*Remains ON or OFF

Any condition

Open loop system

*: Maintains conditions just before switching to open loop.

To check the heated oxygen sensor 1 function, start engine in the Diagnostic Test Mode II and warm it up until
engine coolant temperature indicator points to the middle of the gauge.
Next run engine at about 2,000 rpm for about 2 minutes under no-load conditions. Then make sure that the
MIL comes ON more than 5 times within 10 seconds with engine running at 2,000 rpm under no-load.

OBD System Operation Chart

NHEC0033

RELATIONSHIP BETWEEN MIL, 1ST TRIP DTC, DTC, AND DETECTABLE ITEMS

NHEC0033S01

쐌

When a malfunction is detected for the first time, the 1st trip DTC and the 1st trip freeze frame data are
stored in the ECM memory.

쐌

When the same malfunction is detected in two consecutive trips, the DTC and the freeze frame data are
stored in the ECM memory, and the MIL will come on. For details, refer to “Two Trip Detection Logic” on
EC-75.

쐌

The MIL will go off after the vehicle is driven 3 times with no malfunction. The drive is counted only when
the recorded driving pattern is met (as stored in the ECM). If another malfunction occurs while counting,
the counter will reset.

쐌

The DTC and the freeze frame data will be stored until the vehicle is driven 40 times (driving pattern A)
without the same malfunction recurring (except for Misfire and Fuel Injection System). For Misfire and Fuel
Injection System, the DTC and freeze frame data will be stored until the vehicle is driven 80 times (driv-
ing pattern C) without the same malfunction recurring. The “TIME” in “SELF-DIAGNOSTIC RESULTS”
mode of CONSULT-II will count the number of times the vehicle is driven.

쐌

The 1st trip DTC is not displayed when the self-diagnosis results in “OK” for the 2nd trip.

SUMMARY CHART

NHEC0033S02

Items

Fuel Injection System

Misfire

Other

MIL (goes off)

3 (pattern B)

3 (pattern B)

3 (pattern B)

DTC, Freeze Frame Data (no
display)

80 (pattern C)

80 (pattern C)

40 (pattern A)

1st Trip DTC (clear)

1 (pattern C), *1

1 (pattern C), *1

1 (pattern B)

1st Trip Freeze Frame Data
(clear)

*1, *2

*1, *2

1 (pattern B)

For details about patterns “B” and “C” under “Fuel Injection System” and “Misfire”, see EC-96.
For details about patterns “A” and “B” under “Other”, see EC-98.
*1: Clear timing is at the moment OK is detected.
*2: Clear timing is when the same malfunction is detected in the 2nd trip.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

Malfunction Indicator Lamp (MIL) (Cont’d)

EC-94

RELATIONSHIP BETWEEN MIL, DTC, 1ST TRIP DTC AND DRIVING PATTERNS FOR
“MISFIRE” <EXHAUST QUALITY DETERIORATION>, “FUEL INJECTION SYSTEM”

=NHEC0033S03

SEF392S

*1: When the same malfunction is

detected in two consecutive trips,
MIL will light up.

*2: MIL will go off after vehicle is

driven 3 times (pattern B) without
any malfunctions.

*3: When the same malfunction is

detected in two consecutive trips,
the DTC and the freeze frame
data will be stored in ECM.

*4: The DTC and the freeze frame

data will not be displayed any
longer after vehicle is driven 80
times (pattern C) without the same
malfunction. (The DTC and the
freeze frame data still remain in
ECM.)

*5: When a malfunction is detected

for the first time, the 1st trip DTC
and the 1st trip freeze frame data
will be stored in ECM.

*6: The 1st trip DTC and the 1st trip

freeze frame data will be cleared
at the moment OK is detected.

*7: When the same malfunction is

detected in the 2nd trip, the 1st
trip freeze frame data will be
cleared.

*8: 1st trip DTC will be cleared when

vehicle is driven once (pattern C)
without the same malfunction after
DTC is stored in ECM.

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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

EC-95

EXPLANATION FOR DRIVING PATTERNS FOR “MISFIRE <EXHAUST QUALITY
DETERIORATION>”, “FUEL INJECTION SYSTEM”

NHEC0033S04

<Driving Pattern B>

NHEC0033S0401

Driving pattern B means the vehicle operation as follows:
All components and systems should be monitored at least once by the OBD system.

쐌

The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.

쐌

The B counter will be counted up when driving pattern B is satisfied without any malfunction.

쐌

The MIL will go off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)

<Driving Pattern C>

NHEC0033S0402

Driving pattern C means the vehicle operation as follows:
1) The following conditions should be satisfied at the same time:

Engine speed: (Engine speed in the freeze frame data)

±

375 rpm

Calculated load value: (Calculated load value in the freeze frame data) x (1

±

0.1) [%]

Engine coolant temperature (T) condition:

쐌

When the freeze frame data shows lower than 70°C (158°F), “T” should be lower than 70°C (158°F).

쐌

When the freeze frame data shows higher than or equal to 70°C (158°F), “T” should be higher than or
equal to 70°C (158°F).

Example:
If the stored freeze frame data is as follows:
Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80°C (176°F)
To be satisfied with driving pattern C, the vehicle should run under the following conditions:
Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70°C
(158°F)

쐌

The C counter will be cleared when the malfunction is detected regardless of (1).

쐌

The C counter will be counted up when (1) is satisfied without the same malfunction.

쐌

The DTC will not be displayed after C counter reaches 80.

쐌

The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC
is stored in ECM.

ON BOARD DIAGNOSTIC SYSTEM DESCRIPTION

OBD System Operation Chart (Cont’d)

EC-96