Infiniti I30. Emission Control System (2003 year). Manual

SYMPTOM

Reference
section

HARD/NO

T/REST

(EXCP

HA)

ENGINE

ALL

HESIT

TION/SURGING/FLA

SPOT

ARK

KNOCK/DET

ONA

TION

LACK

POWER/POOR

ACCELERA

TION

HIGH

IDLE/LOW

IDLE

ROUGH

IDLE/HUNTING

IDLING

VIBRA

TION

SLOW/NO

RETURN

IDLE

OVERHEA

TS/W

TER

TEMPERA

TURE

HIGH

EXCESSIVE

FUEL

CONSUMPTION

EXCESSIVE

OIL

CONSUMPTION

TTER

DEAD

(UNDER

CHARGE)

Warranty symptom code

AA AB AC AD AE AF AG

AK AL AM HA

Engine

Cylinder head

EM section

Cylinder head gasket

Cylinder block

Piston

Piston ring

Connecting rod

Bearing

Crankshaft

Valve
mechanism

Timing chain

Camshaft

Intake valve timing control

Intake valve

Exhaust valve

Exhaust

Exhaust manifold/Tube/Muffler/
Gasket

FE section

Three way catalyst

Lubrication

Oil pan/Oil strainer/Oil pump/Oil
filter/Oil gallery

MA, EM, LC
section

Oil level (Low)/Filthy oil

LC section

Cooling

Radiator/Hose/Radiator filler cap

Thermostat

Water pump

Water gallery

Cooling fan

Coolant level (low)/Contaminated
coolant

MA section

1 - 6: The numbers refer to the order of inspection.

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Matrix Chart (Cont’d)

EC-129

SYMPTOM

Reference
section

HARD/NO

T/REST

(EXCP

HA)

ENGINE

ALL

HESIT

TION/SURGING/FLA

SPOT

ARK

KNOCK/DET

ONA

TION

LACK

POWER/POOR

ACCELERA

TION

HIGH

IDLE/LOW

IDLE

ROUGH

IDLE/HUNTING

IDLING

VIBRA

TION

SLOW/NO

RETURN

IDLE

OVERHEA

TS/W

TER

TEMPERA

TURE

HIGH

EXCESSIVE

FUEL

CONSUMPTION

EXCESSIVE

OIL

CONSUMPTION

TTER

DEAD

(UNDER

CHARGE)

Warranty symptom code

AA AB AC AD AE AF AG

AK AL AM HA

IVIS (INFINITI Vehicle Immobilizer System —
NATS)

EC-90 or EL
section

1 - 6: The numbers refer to the order of inspection.

CONSULT-II Reference Value in Data Monitor
Mode

NHEC1426

Remarks:

쐌

Specification data are reference values.

쐌

Specification data are output/input values which are detected or supplied by the ECM at the connector.

* Specification data may not be directly related to their components signals/values/operations.
i.e. Adjust ignition timing with a timing light before monitoring IGN TIMING, because the monitor may show the specification data in

spite of the ignition timing not being adjusted to the specification data. This IGN TIMING monitors the data calculated by the ECM
according to the signals input from the camshaft position sensor and other ignition timing related sensors.

MONITOR ITEM

CONDITION

SPECIFICATION

ENG SPEED

쐌

Run engine and compare CONSULT-II value with the tachometer indi-
cation.

Almost the same speed as
the tachometer indication.

MAS A/F SE-B1

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

1.1 - 1.5V

2,500 rpm

1.7 - 2.4V

COOLAN TEMP/S

쐌

Engine: After warming up

More than 70°C (158°F)

HO2S1 (B1)
HO2S1 (B2)

쐌

Engine: After warming up

Maintaining engine speed at 2,000
rpm

0 - 0.3V

Approx. 0.6 -

1.0V

HO2S1 MNTR (B1)
HO2S1 MNTR (B2)

LEAN

RICH

Changes more than 5 times
during 10 seconds.

HO2S2 (B1)
HO2S2 (B2)

쐌

Warm-up condition

쐌

After keeping engine speed
between 3,500 and 4,000 rpm
for 1 minute and at idle for 1
minute under no load

Revving engine from idle up to 3,000
rpm quickly

0 - 0.3V

Approx. 0.6 -

1.0V

HO2S2 MNTR (B1)
HO2S2 MNTR (B2)

LEAN

RICH

VHCL SPEED SE

쐌

Turn drive wheels and compare CONSULT-II value with the speedom-
eter indication

Almost the same speed as
the speedometer indication

BATTERY VOLT

쐌

Ignition switch: ON (Engine stopped)

11 - 14V

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

Symptom Matrix Chart (Cont’d)

EC-130

MONITOR ITEM

CONDITION

SPECIFICATION

ACCEL SEN 1

쐌

Ignition switch: ON
(Engine stopped)

쐌

Shift lever: “D”

Accelerator pedal: Released

0.41 - 0.71V

Accelerator pedal: Fully depressed

More than 3.7V

ACCEL SEN 2*

쐌

Ignition switch: ON
(Engine stopped)

쐌

Shift lever: “D”

Accelerator pedal: Released

0.15 - 0.97V

Accelerator pedal: Fully depressed

More than 3.5V

THRTL SEN 1
THRTL SEN 2*

쐌

Ignition switch: ON
(Engine stopped)

쐌

Shift lever: “D”

Accelerator pedal: Released

More than 0.36V

Accelerator pedal: Fully depressed

Less than 4.75V

START SIGNAL

쐌

Ignition switch: ON

START

OFF

CLSD THL POS

쐌

Ignition switch: ON
(Engine stopped)

Accelerator pedal: Fully released

Accelerator pedal: Slightly depressed OFF

AIR COND SIG

쐌

Engine: After warming up, idle
the engine

Air conditioner switch: “OFF”

OFF

Air conditioner switch: “ON”
(Compressor operates.)

P/N POSI SW

쐌

Ignition switch: ON

Shift lever: “P” or “N”

Except above

OFF

PW/ST SIGNAL

쐌

Engine: After warming up, idle
the engine

Steering wheel in neutral position
(forward direction)

OFF

The steering wheel is turned

IGNITION SW

쐌

Ignition switch: ON

OFF

INJ PULSE-B1
INJ PULSE-B2

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

2.0 - 3.0 msec

2,000 rpm

1.9 - 2.9 msec

B/FUEL SCHDL

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

2.3 - 2.9 msec

2,000 rpm

2.3 - 2.9 msec

IGN TIMING

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

13 - 18° BTDC

2,000 rpm

25 - 45° BTDC

LOAD SIGNAL

쐌

Ignition switch: ON

Rear window defogger switch is ON
and/or lighting switch is in 2nd.

Rear window defogger switch is OFF
and lighting switch is OFF.

OFF

PURG VOL C/V

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

0 %

2,000 rpm

—

A/F ALPHA-B1
A/F ALPHA-B2

쐌

Engine: After warming up

Maintaining engine speed at 2,000
rpm

54 - 155%

EVAP SYS PRES

쐌

Ignition switch: ON

Approx. 3.4V

AIR COND RLY

쐌

Air conditioner switch: OFF

OFF

FUEL PUMP RLY

쐌

Ignition switch is turned to ON (Operates for 1 seconds)

쐌

Engine running or cranking

Except as shown above

OFF

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

EC-131

MONITOR ITEM

CONDITION

SPECIFICATION

VENT CONT/V

쐌

Ignition switch: ON

OFF

HO2S1 HTR (B1)
HO2S1 HTR (B2)

쐌

Engine: After warming up

쐌

Engine speed: Below 3,600 rpm

쐌

Engine speed: Above 3,600 rpm

OFF

HO2S2 HTR (B1)
HO2S2 HTR (B2)

쐌

Ignition switch: ON (Engine stopped)

쐌

Engine speed: Above 3,600 rpm

OFF

쐌

Engine speed: Below 3,600 rpm after the following conditions are met.

쐌

After warming up

쐌

After keeping the engine speed between 3,500 and 4,000 rpm for 1
minute and at idle for 1 minute under no load

VC/V BYPASS/V

Ignition switch: ON

OFF

CAL/LD VALUE

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

10 - 35%

2,500 rpm

10 - 35%

BRAKE SW

쐌

Ignition switch: ON

Brake pedal: Released

OFF

Brake pedal: Slightly depressed

MASS AIRFLOW

쐌

Engine: After warming up

쐌

Air conditioner switch: “OFF”

쐌

Shift lever: “N”

쐌

No-load

Idle

2.0 - 6.0 g·m/s

2,500 rpm

7.0 - 20.0 g·m/s

ABSOL PRES/SE

쐌

Ignition switch: ON

Approx. 4.4V

VIAS S/V

쐌

Engine: After warming up

1,800 - 3,600 rpm

Except above conditions

OFF

TRVL AFTER MIL

Ignition switch: ON

Vehicle has traveled after MIL has
turned ON.

0 - 65,535 km
(0 - 40,723 mile)

AC PRESS SEN

쐌

Ignition switch: ON (Engine stopped)

Approx. 0V

쐌

Engine: Idle

쐌

Air conditioner switch: OFF

1.0 - 4.0V

INT/V TIM (B1)
INT/V TIM (B2)

쐌

Engine: After warming up

쐌

Shift lever “N”

쐌

Quickly depressed accelerator
pedal

쐌

No-load

Idle

−5 - 5° CA

2,000 rpm

Approximately 0 - 30° CA

INT/V SOL (B1)
INT/V SOL (B2)

쐌

Engine: After warming up

쐌

Shift lever “N”

쐌

Quickly depressed accelerator
pedal

쐌

No-load

Idle

0 - 2%

2,000 rpm

Approximately 25 - 50%

ENGINE MOUNT

쐌

Engine: Running

Idle

“IDLE”

2,000 rpm

“TRVL”

COOLING FAN

쐌

After warming up engine, idle
the engine.

쐌

After conditioner switch: “OFF”

Engine coolant temperature is 94°C
(201°F) or less.

OFF

Engine coolant temperature is
between 95°C (203°F) and 99°C
(210°F).

LOW

Engine coolant temperature is 100°C
(212°F) or more.

HIGH

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

EC-132

MONITOR ITEM

CONDITION

SPECIFICATION

VHCL SPEED SE

Turn drive wheels and compare speedometer indication with the CON-
SULT-II value.

Almost the same speed as
the CONSULT-II value

SET VHCL SPD

쐌

ASCD set condition.

The preset vehicle speed is
displayed.

MAIN SW

쐌

Ignition switch: ON

쐌

ON/OFF (MAIN) switch: Pressed

쐌

ON/OFF (MAIN) switch: Released

OFF

CANCEL SW

쐌

Ignition switch: ON

쐌

CANCEL switch: Pressed

쐌

CANCEL switch: Released

OFF

RESUME/ACC SW

쐌

Ignition switch: ON

쐌

ACCEL/RESUME switch: Pressed

쐌

ACCEL/RESUME switch:
Released

OFF

SET SW

쐌

Ignition switch: ON

쐌

COAST/SET switch: Pressed

쐌

COAST/SET switch: Released

OFF

BRAKE SW 1

쐌

Ignition switch: ON

쐌

Shift lever: Except “N” and “P”
position

쐌

Brake pedal: Released

쐌

Brake pedal: Depressed

OFF

BRAKE SW 2

쐌

Ignition switch: ON

쐌

Brake pedal: Released

OFF

쐌

Brake pedal: Depressed

CRUISE LAMP

쐌

Ignition switch: ON

쐌

ON/OFF (MAIN) switch: Pressed
at the 1st time

at the 2nd time

OFF

SET LAMP

쐌

Ignition switch: ON

쐌

When vehicle speed is between
40 km/h (25 MPH) and 144 km/h
(89 MPH)

쐌

SET lamp is indicated.

쐌

SET lamp is not indicated.

OFF

*: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ from
ECM terminals voltage signal.

Major Sensor Reference Graph in Data Monitor
Mode

NHEC1427

The following are the major sensor reference graphs in “DATA MONITOR” mode.

CLSD THL POS, ACCEL SEN1, THRTL SEN1

NHEC1427S01

Below is the data for “CLSD THL POS”, “ACCEL SEN1” and “THRTL SEN1” when depressing the accelera-
tor pedal with the ignition switch “ON” and with selector lever in “D” position.
The signal of “ACCEL SEN1” and “THRTL SEN1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from “ON” to “OFF”.

SEC041D

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

CONSULT-II Reference Value in Data Monitor Mode (Cont’d)

EC-133

SEC042D

ECM Terminals and Reference Value

NHEC0044

PREPARATION

NHEC0044S01

ECM is located behind the instrument lower cover. For this
inspection, remove instrument lower cover.

Remove ECM harness protector.

MEC486B

Perform all voltage measurements with the connector con-
nected. Extend tester probe as shown to perform tests easily.

쐌

Open harness securing clip to make testing easier.

쐌

Use extreme care not to touch 2 pins at one time.

쐌

Data is for comparison and may not be exact.

ECM HARNESS CONNECTOR TERMINAL LAYOUT

NHEC0044S02

SEF970W

ECM INSPECTION TABLE

NHEC0044S03

Specification data are reference values and are measured between
each terminal and ground.
Pulse signal is measured by CONSULT-II.

CAUTION:

Do not use ECM ground terminals when measuring the input/
output voltage. Doing so may result in damage to the ECM’s
transistor. Use ground other than the ECM terminals, such as
the ground.

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value

EC-136

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

1
2
3

12
13

R/B
R/W
R/Y
R/L
L/W
PU/R

Injector No. 1
Injector No. 2
Injector No. 3
Injector No. 4
Injector No. 5
Injector No. 6

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

BATTERY VOLTAGE
(11 - 14V)

★

SEC984C

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is 2,000 rpm.

BATTERY VOLTAGE
(11 - 14V)

★

SEC985C

Electronic controlled
engine mount-1

[Engine is running]

쐌

Idle speed

0 - 1V

[Engine is running]

쐌

Except the above

BATTERY VOLTAGE
(11 - 14V)

5
6
7

15
16
17

Y/R
G/R
L/R
GY
PU/W
GY/R

Ignition signal No. 1
Ignition signal No. 2
Ignition signal No. 3
Ignition signal No. 4
Ignition signal No. 5
Ignition signal No. 6

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

0 - 0.2V

★

SEC986C

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is 2,500 rpm.

0.1 - 0.3V

★

SEC987C

Intake valve timing
control solenoid valve
(bank 2)

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is 2,500 rpm.

7 - 12V

★

PBIB1790E

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-137

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

L/W

Intake valve timing
control solenoid valve
(bank 1)

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is 2,500 rpm.

7 - 12V

★

PBIB1790E

PU/R

EVAP canister purge
volume control sole-
noid valve

[Engine is running]

쐌

Idle speed

BATTERY VOLTAGE
(11 - 14V)

★

SEC990C

[Engine is running]

쐌

Engine speed is 2,000 rpm (More than 100 sec-
onds after starting engine).

BATTERY VOLTAGE
(11 - 14V)

★

SEC991C

W/R

Electronic controlled
engine mount-2

[Engine is running]

쐌

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

쐌

Except the above

0 - 1V

PU/W

Engine coolant tem-
perature sensor sig-
nal output

[Engine is running]

쐌

Idle speed

0 - 12V
Output voltage varies with engine
coolant temperature.

B/R

Air conditioner relay

[Engine is running]

쐌

Both A/C switch and blower switch are “ON”
(Compressor is operating).

0 - 1.0V

[Engine is running]

쐌

A/C switch is “OFF”.

BATTERY VOLTAGE
(11 - 14V)

B/P

Fuel pump relay

[Ignition switch “ON”]

쐌

For 1 second after turning ignition switch “ON”

[Engine is running]

0 - 1.5V

[Ignition switch “ON”]

쐌

More than 1 second after turning ignition switch
“ON”

BATTERY VOLTAGE
(11 - 14V)

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-138

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

ASCD CRUISE lamp

[Ignition switch “ON”]

쐌

CRUISE switch is “ON”.

[Ignition switch “ON”]

쐌

CRUISE switch is “OFF”.

BATTERY VOLTAGE
(11 - 14V)

ASCD SET lamp

[Engine is running]

쐌

SET switch is “ON”.

쐌

ASCD control is operating.

[Engine is running]

쐌

SET or CRUISE switch is “OFF”.

쐌

ASCD control is not operating.

BATTERY VOLTAGE
(11 - 14V)

Throttle control motor
relay

[Ignition switch “OFF”]

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch “ON”]

0 - 1.0V

Y/G

VIAS control solenoid
valve

[Engine is running]

쐌

Idle speed

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

쐌

Engine speed is between 1,800 and 3,600 rpm.

0 - 1.0V

OR/G

Vacuum cut valve
bypass valve

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

A/C cut signal

[Engine is running]

쐌

Air conditioner is operating.

0 - 0.5V

Counter current
return

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

LG/B

MIL

[Ignition switch “ON”]

0 - 1.0V

[Engine is running]

쐌

Idle speed

BATTERY VOLTAGE
(11 - 14V)

W/G

Tachometer

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

7 - 8V

★

SEC992C

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is 2,500 rpm.

7 - 8V

★

SEC032D

BR/R

Cooling fan relay
(LOW)

[Engine is running]

쐌

Cooling fan is operating.

0 - 1.0V

[Engine is running]

쐌

Cooling fan is not operating.

BATTERY VOLTAGE
(11 - 14V)

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-139

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Cooling fan relay
(HIGH)

[Engine is running]

쐌

Cooling fan is operating at high speed.

0 - 1.0V

[Engine is running]

쐌

Cooling fan is not operating.

BATTERY VOLTAGE
(11 - 14V)

W/B

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch “ON”]

쐌

For a few seconds after turning ignition switch
“OFF”

0 - 1.5V

[Ignition switch “ON”]

쐌

A few seconds after turning ignition switch “OFF”

BATTERY VOLTAGE
(11 - 14V)

OR/L

Heated oxygen sen-
sor 1 heater (bank 1)

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is below 3,600 rpm.

Approximately 7V

★

PBIB0519E

[Engine is running]

쐌

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

R/L

Heated oxygen sen-
sor 1 heater (bank 2)

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is below 3,600 rpm.

Approximately 7V

★

PBIB0519E

[Engine is running]

쐌

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

P/B

Heated oxygen sen-
sor 2 heater (bank 1)

[Engine is running]

쐌

Engine speed is below 3,600 rpm after the fol-
lowing conditions are met.

–

Engine: after warming up

–

Keeping engine speed between 3,500 and
4,000 rpm for 1 minute and at idle for 1 minute
under no load

0 - 0.5V

[Ignition switch “ON”]

쐌

Engine stopped

[Engine is running]

쐌

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

BR/W

Start signal

[Ignition switch “ON”]

Approximately 0V

[Ignition switch “START”]

9 - 12V

Ignition switch

[Ignition switch “OFF”]

[Ignition switch “ON”]

BATTERY VOLTAGE
(11 - 14V)

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-140

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

G/OR

PNP switch

[Ignition switch “ON”]

쐌

General position is “P” or “N”.

Approximately 0V

[Ignition switch “ON”]

쐌

Except the above gear position

BATTERY VOLTAGE
(11 - 14V)

G/B

Air conditioner switch
signal

[Engine is running]

쐌

Both A/C switch and blower switch are “ON”.

Approximately 0V

[Engine is running]

쐌

A/C switch is “OFF”.

BATTERY VOLTAGE
(11 - 14V)

R/L

Heated oxygen sen-
sor 2 heater (bank 2)

[Engine is running]

쐌

Engine speed is below 3,600 rpm after the fol-
lowing conditions are met.

–

Engine: after warming up

–

Keeping engine speed between 3,500 and
4,000 rpm for 1 minute and at idle for 1 minute
under no load

0 - 0.5V

[Ignition switch “ON”]

쐌

Engine stopped

[Engine is running]

쐌

Engine speed is above 3,600 rpm.

BATTERY VOLTAGE
(11 - 14V)

ECM ground

[Engine is running]

쐌

Idle speed

Engine ground

G/Y

ASCD steering
switch

[Ignition switch “ON”]

쐌

ASCD steering switch: “OFF”

Approximately 4.0V

[Ignition switch “ON”]

쐌

ON/OFF (MAIN) switch: Pressed

Approximately 0V

[Ignition switch “ON”]

쐌

CANCEL switch: Pressed

Approximately 1.0V

[Ignition switch “ON”]

쐌

ACCEL/RESUME switch: Pressed

Approximately 3.0V

[Ignition switch “ON”]

쐌

COAST/SET switch: Pressed

Approximately 2.0V

W/G

Electrical load signal

[Engine is running]

쐌

Rear window defogger: ON

쐌

Hi-beam headlamp: ON

BATTERY VOLTAGE
(11 - 14V)

[Engine is running]

쐌

Electrical load: OFF

R/G

Stop lamp switch

[Ignition switch “ON”]
Brake pedal is depressed.

BATTERY VOLTAGE
(11 - 14V)

[Ignition switch “ON”]
Brake pedal is released.

Approximately 0V

ECM ground

[Engine is running]

쐌

Idle speed

Engine ground

Sensors’ ground

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

Approximately 0V

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-141

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

G/B

ASCD brake switch

[Ignition switch “ON”]

쐌

Brake pedal is depressed.

[Ignition switch “ON”]

쐌

Brake pedal is released.

BATTERY VOLTAGE
(11 - 14V)

EVAP control system
pressure sensor

[Ignition switch “ON”]

Approximately 3.4V

Mass air flow sensor

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

1.1 - 1.5V

[Engine is running]

쐌

Warm-up condition

쐌

Engine speed is 2,500 rpm.

1.7 - 2.4V

Accelerator pedal
position sensor 2
power supply

[Ignition switch “ON”]

Approximately 2.5V

Camshaft position
sensor (PHASE)
(bank 1)

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

1.0 - 4.0V

★

SEC033D

[Engine is running]

쐌

Engine speed is 2,000 rpm.

1.0 - 4.0V

★

SEC034D

Y/G

Mass air flow sensor
(Intake air tempera-
ture sensor)

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.

W/L

Power supply for
ECM (Back-up)

[Ignition switch “OFF”]

BATTERY VOLTAGE
(11 - 14V)

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-142

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

P/L

Vehicle speed sensor

[Engine is running]

쐌

Jack-up front wheels

쐌

In 1st gear position

쐌

10 km/h (6 MPH)

Approximately 2.5V

★

SEC039D

[Engine is running]

쐌

Jack-up front wheels

쐌

In 2nd gear position

쐌

30 km/h (19 MPH)

Approximately 2.5V

★

SEC040D

Fuel level sensor

[Ignition switch “ON”]

Approximately 0 - 4.8V
Output voltage varies with fuel
level.

B/P

Accelerator pedal
position sensor 2
ground

[Ignition switch “ON”]

Approximately 0V

Knock sensor

[Engine is running]

쐌

Idle speed

Approximately 2.5V

Accelerator pedal
position sensor signal
output

[Engine is running]

쐌

Warm-up condition

쐌

Accelerator pedal released

Approximately 0.6V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Accelerator pedal fully depressed

Approximately 4.0V

Accelerator pedal
position sensor 1

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Accelerator pedal released

0.41 - 0.71V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Accelerator pedal fully depressed

More than 3.7V

W/B

Accelerator pedal
position sensor 2

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Accelerator pedal released

0.08 - 0.48V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Accelerator pedal fully depressed

More than 1.8V

P/B

Fuel tank tempera-
ture sensor

[Engine is running]

Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.

Fuel level sensor
ground

[Engine is running]

쐌

Idle speed

Approximately 0V

Mass air flow sensor
ground

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

Approximately 0V

IDX

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-143

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

Refrigerant pressure
sensor

[Engine is running]

쐌

Warm-up condition

쐌

Both A/C switch and blower switch are “ON”.
(Compressor operates.)

1.0 - 4.0V

Throttle position sen-
sor 1

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Gear position is “D”

쐌

Accelerator pedal released

More than 0.36V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Gear position is “D”

쐌

Accelerator pedal fully depressed

Less than 4.75V

Throttle position sen-
sor 2

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Gear position is “D”

쐌

Accelerator pedal released

Less than 4.75V

[Ignition switch “ON”]

쐌

Engine stopped

쐌

Gear position is “D”

쐌

Accelerator pedal fully depressed

More than 0.36V

Camshaft position
sensor (PHASE)
(bank 2)

[Engine is running]

쐌

Warm-up condition

쐌

Idle speed

NOTE:
The pulse cycle changes depending on rpm at idle.

1.0 - 4.0V

★

SEC033D

[Engine is running]

쐌

Engine speed is 2,000 rpm.

1.0 - 4.0V

★

SEC034D

Heated oxygen sen-
sor 2 (bank 1)

[Engine is running]

쐌

Warm-up condition

쐌

Revving engine from idle to 3,000 rpm quickly
after the following conditions are met.

–

After keeping engine speed between 3,500 and
4,000 rpm for 1 minute and at idle for 1 minute
under no load

0 - Approximately 1.0V

Power steering pres-
sure sensor

[Engine is running]

쐌

Steering wheel is being turned.

0.5 - 4.0V

[Engine is running]

쐌

Steering wheel is not being turned.

0.4 - 0.8V

TROUBLE DIAGNOSIS — GENERAL DESCRIPTION

ECM Terminals and Reference Value (Cont’d)

EC-144

Infiniti I30. Emission Control System (2003 year). Manual - part 9