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Infiniti M45 (Y34). Manual - part 357

TROUBLE DIAGNOSIS

EC-117

DATA MONITOR (SPEC) MODE
Monitored Item

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ACTIVE TEST MODE
Test Item

Monitored item [Unit]

ECM

INPUT

SIG-

NALS

MAIN

SIG-

NALS

Description

Remarks

ENG SPEED [rpm]

●

Indicates the engine speed computed
from the signals of the crankshaft posi-
tion sensor (POS) and camshaft position
sensor (PHASE).

MAS A/F SE-B1 [V]

●

The signal voltage of the mass air flow
sensor specification is displayed.

●

When engine is running specification
range is indicated.

B/FUEL SCHDL
[msec]

●

“Base fuel schedule” indicates the fuel
injection pulse width programmed into
ECM, prior to any learned on board cor-
rection.

●

When engine is running specification
range is indicated.

A/F ALPHA-B1 [%]
A/F ALPHA-B2 [%]

●

The mean value of the air-fuel ratio feed-
back correction factor per cycle is indi-
cated.

●

When engine is running specification
range is indicated.

●

This data also includes the data for the
air-fuel ratio learning control.

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

FUEL INJEC-
TION

●

Engine: Return to the original
trouble condition

●

Change the amount of fuel injec-
tion using CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

Fuel injector

●

Heated oxygen sensor 1

IGNITION TIM-
ING

●

Engine: Return to the original
trouble condition

●

Timing light: Set

●

Retard the ignition timing using
CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Perform Idle Air Volume Learning.

POWER BAL-
ANCE

●

Engine: After warming up, idle
the engine.

●

A/C switch: OFF

●

Selector lever: P or N

●

Cut off each injector signal one at
a time using CONSULT-II.

Engine runs rough or dies.

●

Harness and connectors

●

Compression

●

Fuel injector

●

Power transistor

●

Spark plug

●

Ignition coil

ENG COOLANT
TEMP

●

Engine: Return to the original
trouble condition

●

Change the engine coolant tem-
perature using CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

Engine coolant temperature sen-
sor

●

Fuel injector

FUEL PUMP
RELAY

●

Ignition switch: ON
(Engine stopped)

●

Turn the fuel pump relay “ON”
and “OFF” using CONSULT-II
and listen to operating sound.

Fuel pump relay makes the operat-
ing sound.

●

Harness and connectors

●

Fuel pump relay

VIAS SOL VALVE

●

Ignition switch: ON

●

Turn solenoid valve “ON” and
“OFF” with CONSULT-II and lis-
ten for operating sound.

Solenoid valve makes an operating
sound.

●

Harness and connectors

●

Solenoid valve

EC-118

TROUBLE DIAGNOSIS

DTC & SRT CONFIRMATION MODE
SRT STATUS Mode

For details, refer to

EC-55, "SYSTEM READINESS TEST (SRT) CODE"

SRT WORK SUPPORT Mode

This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.

PURG VOL
CONT/V

●

Engine: After warming up, run
engine at 1,500 rpm.

●

Change the EVAP canister purge
volume control solenoid valve
opening percent using CON-
SULT-II.

Engine speed changes according to
the opening percent.

●

Harness and connectors

●

Solenoid valve

FUEL/T TEMP
SEN

●

Change the fuel tank temperature using CONSULT-II.

VENT CON-
TROL/V

●

Ignition switch: ON
(Engine stopped)

●

Turn solenoid valve “ON” and
“OFF” with the CONSULT-II and
listen to operating sound.

Solenoid valve makes an operating
sound.

●

Harness and connectors

●

Solenoid valve

FPCM

●

Engine: Returns to the original
trouble condition

●

Select “LOW” and “HI” with CON-
SULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

FPCM

VC/V BYPASS/V

●

Ignition switch: ON
(Engine stopped)

●

Turn solenoid valve “ON” and
“OFF” with the CONSULT-II and
listen to operating sound.

Solenoid valve makes an operating
sound.

●

Harness and connectors

●

Solenoid valve

V/T ASSIGN
ANGLE

●

Engine: Return to the original
trouble condition

●

Change intake valve timing using
CONSULT-II.

If trouble symptom disappears, see
CHECK ITEM.

●

Harness and connectors

●

Intake valve timing control sole-
noid valve

TARGET FAN
RPM

●

Engine: After warming up, idle
the engine

●

Change the target speed of cool-
ing fan using CONSULT-II.

Cooling fan operating speed
changes according to the target
speed.

●

Harness and connectors

●

Cooling fan speed control sole-
noid valve

●

Cooling fan pump

●

Cooling fan drive pump

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

TROUBLE DIAGNOSIS

EC-119

DTC WORK SUPPORT Mode

Test mode

Test item

Condition

Reference page

EVAPORATIVE SYS-
TEM

PURGE FLOW P0441

EC-327

EVAP SML LEAK P0442/P1442

Refer to corresponding
trouble diagnosis for
DTC.

EC-333

EC-535

EVAP V/S LEAK P0456/P1456

PURG VOL CN/V P1444

VC CUT/V BP/V P1491

HO2S1

HO2S1 (B1) P0133

HO2S1 (B1) P0134

HO2S1 (B1) P1143

HO2S1 (B1) P1144

HO2S1 (B2) P0153

HO2S1 (B2) P0154

HO2S1 (B2) P1163

HO2S1 (B2) P1164

H02S2

HO2S2 (B1) P0139

HO2S2 (B1) P1146

HO2S2 (B1) P1147

HO2S2 (B2) P0159

HO2S2 (B2) P1166

HO2S2 (B2) P1167

EC-120

TROUBLE DIAGNOSIS

REAL TIME DIAGNOSIS IN DATA MONITOR MODE (RECORDING VEHICLE DATA)
Description

CONSULT-II has two kinds of triggers and they can be selected by touching “SETTING” in “DATA MONITOR”
mode.

“AUTO TRIG” (Automatic trigger):

●

The malfunction will be identified on the CONSULT-II screen
in real time.
In other words, DTC/1st trip DTC and malfunction item will be
displayed if the malfunction is detected by ECM.
At the moment a malfunction is detected by ECM, “MONI-
TOR” in “DATA MONITOR” screen is changed to “Recording
Data... xx%” as shown at right, and the data after the malfunc-
tion detection is recorded. Then when the percentage
reached 100%, “REAL-TIME DIAG” screen is displayed. If
“STOP” is touched on the screen during “Recording Data...
xx%”, “REAL-TIME DIAG” screen is also displayed.
The recording time after the malfunction detection and the
recording speed can be changed by “TRIGGER POINT” and
“Recording Speed”. Refer to CONSULT-II Operation Manual.

“MANU TRIG” (Manual trigger):

●

DTC/1st trip DTC and malfunction item will not be displayed
automatically on CONSULT-II screen even though a malfunc-
tion is detected by ECM.
DATA MONITOR can be performed continuously even though
a malfunction is detected.

Operation

“AUTO TRIG”

●

While trying to detect the DTC/1st trip DTC by performing the DTC Confirmation Procedure, be sure to
select to “DATA MONITOR (AUTO TRIG)” mode. You can confirm the malfunction at the moment it is
detected.

●

While narrowing down the possible causes, CONSULT-II should be set in “DATA MONITOR (AUTO
TRIG)” mode, especially in case the incident is intermittent.
When you are inspecting the circuit by gently shaking (or twisting) the suspicious connectors, compo-
nents and harness in the DTC Confirmation Procedure, the moment a malfunction is found the DTC/1st
trip DTC will be displayed. (Refer to “Incident Simulation Tests” in

GI-26, "How to Perform Efficient

Diagnosis for an Electrical Incident"

“MANU TRIG”

●

If the malfunction is displayed as soon as “DATA MONITOR” is selected, reset CONSULT-II to “MANU
TRIG”. By selecting “MANU TRIG” you can monitor and store the data. The data can be utilized for fur-
ther diagnosis, such as a comparison with the value for the normal operating condition.

PBIB1951E

SEF707X

Content .. 355 356 357 358 ..