Infiniti Q45. Manual — part 373

TROUBLE DIAGNOSIS

EC-131

C

D

E

F

G

H

I

J

K

L

M

A

EC

VIAS S/V

●

Selector lever: P or N

ON

●

Engine speed: More than 5,000 rpm

●

Selector lever: Except P or N

●

Engine speed: Less than 5,000 rpm

OFF

AIR COND RLY

●

Engine: After warming up, idle the
engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

ON

FUEL PUMP RLY

●

For 5 seconds after turning ignition switch: ON

●

Engine running or cranking

ON

●

Except above

OFF

FPCM

●

Engine: Cranking

HI

●

Engine: Idle

●

Engine coolant temperature: More than 10

°

C (50

°

F)

LOW

VC/V BYPASS/V

●

Ignition switch: ON

OFF

VENT CONT/V

●

Ignition switch: ON

OFF

THRTL RELAY

●

Ignition switch: ON

ON

COOLING FAN

●

Engine: After warming up, idle the
engine

●

Air 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 between
100

°

C (212

°

F) and 104

°

C (219

°

F)

MID

Engine coolant temperature is 105

°

C

(221

°

F) or more

HI

HO2S2 HTR (B1)
HO2S2 HTR (B2)

●

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

–

Engine: After warming up

–

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

ON

●

Engine speed: Above 3,600 rpm

OFF

I/P PULLY SPD

●

Vehicle speed: More than 20 km/h (12 MPH)

Almost the same speed as
the tachometer indication

VEHICLE SPEED

●

Turn drive wheels and compare CONSULT-II value with the speedometer indi-
cation.

Almost the same speed as
the speedometer indication

TRVL AFTER MIL

●

Ignition switch: ON

Vehicle has traveled after MIL has turned
ON.

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

A/F S1 HTR (B1)
A/F S1 HTR (B2)

●

Engine: After warming up, idle the engine

0 - 100%

AC PRESS SEN

●

Engine: Idle

●

Both air conditioner switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0V

VHCL SPEED SE

●

Turn drive wheels and compare CONSULT-II value with the speedometer indi-
cation.

Almost the same speed as
the speedometer indication

SET VHCL SPD

●

Engine: Running

ASCD: Operating

The preset vehicle speed is
displayed

MAIN SW

●

Ignition switch: ON

MAIN switch: Pressed

ON

MAIN switch: Released

OFF

CANCEL SW

●

Ignition switch: ON

CANCEL switch: Pressed

ON

CANCEL switch: Released

OFF

MONITOR ITEM

CONDITION

SPECIFICATION

EC-132

TROUBLE DIAGNOSIS

*: 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.

RESUME/ACC SW

●

Ignition switch: ON

RESUME/ACCELERATE switch:
Pressed

ON

RESUME/ACCELERATE switch:
Released

OFF

SET SW

●

Ignition switch: ON

SET/COAST switch: Pressed

ON

SET/COAST switch: Released

OFF

BRAKE SW1
(ICC/ASCD brake
switch)

●

Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

BRAKE SW2
(stop lamp switch)

●

Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

DIST SW

●

Ignition switch: ON

DISTANCE switch: Pressed

ON

DISTANCE switch: Released

OFF

CRUISE LAMP

●

Ignition switch: ON

MAIN switch: Pressed at the 1st time

→

at the 2nd time

ON

→

OFF

SET LAMP

●

MAIN switch: ON

●

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

ASCD: Operating

ON

ASCD: Not operating

OFF

MONITOR ITEM

CONDITION

SPECIFICATION

TROUBLE DIAGNOSIS

EC-133

C

D

E

F

G

H

I

J

K

L

M

A

EC

Major Sensor Reference Graph in Data Monitor Mode

NBS002WH

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

CLSD THL POS, ACCEL SEN 1, THRTL SEN 1

Below is the data for “CLSD THL POS”, “ACCEL SEN 1” and “THRTL SEN 1” when depressing the accelera-
tor pedal with the ignition switch ON and with selector lever in D position.
The signal of “ACCEL SEN 1” and “THRTL SEN 1” should rise gradually without any intermittent drop or rise
after “CLSD THL POS” is changed from “ON” to “OFF”.

ENG SPEED, MAS A/F SE-B1, THRTL SEN 1, HO2S2 (B1), INJ PULSE-B1

Below is the data for “ENG SPEED”, “MAS A/F SE-B1”, “THRTL SEN 1”, “HO2S2 (B1)” and “INJ PULSE-B1”
when revving engine quickly up to 4,800 rpm under no load after warming up engine sufficiently.
Each value is for reference, the exact value may vary.

PBIB0198E

PBIB2445E

EC-134

TROUBLE DIAGNOSIS

PBIB2099E