Nissan Titan A60. Manual — part 347

EC-54

< SYSTEM DESCRIPTION >

[VK56DE]

DIAGNOSIS SYSTEM (ECM)

FUEL PUMP RLY
[ON/OFF]

• Indicates the fuel pump relay control con-

dition determined by ECM according to
the input signals.

FPCM
[HI/LOW]*

• The control condition of the fuel pump

control module (FPCM) (determined by
the ECM according to the input signals)
is indicated.

VENT CONT/V
[ON/OFF]

• The control condition of the EVAP canis-

ter vent control valve (determined by
ECM according to the input signals) is in-
dicated.
ON: Closed
OFF: Open

THRTL RELAY
[ON/OFF]

• Indicates the throttle control motor relay

control condition determined by the ECM
according to the input signals.

HO2S2 HTR (B1)
[ON/OFF]

• Indicates [ON/OFF] condition of heated

oxygen sensor 2 heater determined by
ECM according to the input signals.

HO2S2 HTR (B2)
[ON/OFF]

I/P PULLY SPD
[rpm]

• Indicates the engine speed computed

from the input speed sensor signal.

VEHICLE SPEED
[km/h] or [mph]

• Indicates the vehicle speed computed

from the output speed sensor signal.

IDL A/V LEARN
[YET/CMPLT]

• Display the condition of Idle Air Volume

Learning
YET: Idle Air Volume Learning has not
been performed yet.
CMPLT: Idle Air Volume Learning has al-
ready been performed successfully.

TRVL AFTER MIL
[km] or [mile]

• Distance traveled while MIL is activated.

A/F S1 HTR(B1)
[%]

• A/F sensor 1 heater control value com-

puted by ECM according to the input sig-
nals.

• The current flow to the heater becomes

larger as the value increases.

A/F S1 HTR(B2)
[%]

AC PRESS SEN [V]

• The signal voltage from the refrigerant

pressure sensor is displayed.

VHCL SPEED SE
[km/h] or [mph]

• The vehicle speed computed from the

vehicle speed signal sent from combina-
tion meter is displayed.

SET VHCL SPD
[km/h] or [mph]

• The preset vehicle speed is displayed.

MAIN SW
[ON/OFF]

• Indicates [ON/OFF] condition from MAIN

switch signal.

CANCEL SW
[ON/OFF]

• Indicates [ON/OFF] condition from CAN-

CEL switch signal.

RESUME/ACC SW
[ON/OFF]

• Indicates [ON/OFF] condition from RE-

SUME/ACCELERATE switch signal.

SET SW
[ON/OFF]

• Indicates [ON/OFF] condition from SET/

COAST switch signal.

BRAKE SW1
[ON/OFF]

• Indicates [ON/OFF] condition from

ASCD brake switch signal.

Monitored item

[Unit]

ECM IN-

PUT SIG-

NALS

MAIN

SIGNALS

Description

Remarks

DIAGNOSIS SYSTEM (ECM)

EC-55

< SYSTEM DESCRIPTION >

[VK56DE]

C

D

E

F

G

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EC

N

P

O

BRAKE SW2
[ON/OFF]

• Indicates [ON/OFF] condition of stop

lamp switch signal.

VHCL SPD CUT
[NON/CUT]

• Indicates the vehicle cruise condition.

NON: Vehicle speed is maintained at the
ASCD set speed.
CUT: Vehicle speed increased to exces-
sively high compared with the ASCD set
speed, and ASCD operation is cut off.

LO SPEED CUT
[NON/CUT]

• Indicates the vehicle cruise condition.

NON: Vehicle speed is maintained at the
ASCD set speed.
CUT: Vehicle speed decreased to exces-
sively low compared with the ASCD set
speed, and ASCD operation is cut off.

AT OD MONITOR
[ON/OFF]

• Indicates [ON/OFF] condition of A/T O/D

according to the input signal from the
TCM.

AT OD CANCEL
[ON/OFF]

• Indicates [ON/OFF] condition of A/T O/D

cancel signal sent from the TCM.

CRUISE LAMP
[ON/OFF]

• Indicates [ON/OFF] condition of CRUISE

lamp determined by the ECM according
to the input signals.

SET LAMP
[ON/OFF]

• Indicates [ON/OFF] condition of SET

lamp determined by the ECM according
to the input signals.

ETHANOL M/R
[%]*

• Ethanol mixture ratio presumed by the

ECM according to the input signals is dis-
played.

ALT DUTY [%]

• Indicates the duty ratio of the power gen-

eration command value. The ratio is cal-
culated by ECM based on the battery
current sensor signal.

BAT CUR SEN
[mV]

• The signal voltage of battery current sen-

sor is displayed.

ALT DUTY SIG
[ON/OFF]

• The control condition of the power gener-

ation voltage variable control (deter-
mined by ECM according to the input
signals) is indicated.
ON: Power generation voltage variable
control is active.
OFF: Power generation voltage variable
control is inactive.

A/F ADJ-B1

• Indicates the correction factor stored in

ECM. The factor is calculated from the
difference between the target air/fuel ra-
tio stored in ECM and the air-fuel ratio
calculated from air fuel ratio (A/F) sensor
1 signal.

A/F ADJ-B2

HO2 S2 DIAG1
(B1)
[INCMP/CMPLT]

• Indicates DTC P0139 self-diagnosis (de-

layed responce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

HO2 S2 DIAG1
(B2)
[INCMP/CMPLT]

• Indicates DTC P0159 self-diagnosis (de-

layed responce) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

Monitored item

[Unit]

ECM IN-

PUT SIG-

NALS

MAIN

SIGNALS

Description

Remarks

EC-56

< SYSTEM DESCRIPTION >

[VK56DE]

DIAGNOSIS SYSTEM (ECM)

*1: For Flexible Fuel Vehicle
NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.

ACTIVE TEST MODE

Test Item

HO2 S2 DIAG2
(B1)
[INCMP/CMPLT]

• Indicates DTC P0139 self-diagnosis

(slow response) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

HO2 S2 DIAG2
(B2)
[INCMP/CMPLT]

• Indicates DTC P0159 self-diagnosis

(slow response) condition.
INCMP: Self-diagnosis is incomplete.
CMPLT: Self-diagnosis is complete.

Monitored item

[Unit]

ECM IN-

PUT SIG-

NALS

MAIN

SIGNALS

Description

Remarks

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-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Fuel injector
• Air fuel ratio (A/F) sensor 1

IGNITION TIM-
ING

• Engine: Return to the original

trouble condition

• Timing light: Set
• Retard the ignition timing using

CONSULT-III.

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-III.

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-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Engine coolant temperature sen-

sor

• Fuel injector

FUEL PUMP RE-
LAY

• Ignition switch: ON

(Engine stopped)

• Turn the fuel pump relay ON and

OFF using CONSULT-III and lis-
ten to operating sound.

Fuel pump relay makes the operat-
ing sound.

• Harness and connectors
• Fuel pump relay

PURG VOL
CONT/V

• Engine: After warming up, run en-

gine at 1,500 rpm.

• Change the EVAP canister purge

volume control solenoid valve
opening percent using CON-
SULT-III.

Engine speed changes according to
the opening percent.

• Harness and connectors
• Solenoid valve

FUEL/T TEMP
SEN

• Change the fuel tank temperature using CONSULT-III.

VENT CON-
TROL/V

• Ignition switch: ON

(Engine stopped)

• Turn solenoid valve ON and OFF

with the CONSULT-III and listen
to operating sound.

Solenoid valve makes an operating
sound.

• Harness and connectors
• Solenoid valve

DIAGNOSIS SYSTEM (ECM)

EC-57

< SYSTEM DESCRIPTION >

[VK56DE]

C

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F

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EC

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DTC & SRT CONFIRMATION MODE

SRT STATUS Mode

For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT-III screen; for items whoseSRT

codes are not set, “INCMP” is displayed.

SRT WORK SUPPORT Mode

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

DTC WORK SUPPORT Mode

*: DTC P1442 and P1456 does not apply to A60 models but appears in DTC Work Support Mode screens.

V/T ASSIGN AN-
GLE

• Engine: Return to the original

trouble condition

• Change intake valve timing using

CONSULT-III.

If trouble symptom disappears, see
CHECK ITEM.

• Harness and connectors
• Intake valve timing control sole-

noid valve

ALTERNATOR
DUTY

• Engine: Idle
• Change duty ratio using CON-

SULT-III.

Battery voltage changes.

• Harness and connectors
• IPDM E/R
• Alternator

TEST ITEM

CONDITION

JUDGEMENT

CHECK ITEM (REMEDY)

Test mode

Test item

Corresponding DTC No.

Reference page

EVAPORATIVE
SYSTEM

PURG FLOW P0441

P0441

EC-269

EVP V/S LEAK P0456/P1456*

P0442

EC-274

P0456

EC-317

PURG VOL CN/V P1444

P0443

EC-281

A/F SEN1

A/F SEN1 (B1) P1276

P0130

EC-191

A/F SEN1 (B1) P1278/P1279

P0133

EC-201

A/F SEN1 (B2) P1286

P0150

EC-191

A/F SEN1 (B2) P1288/P1289

P0153

EC-201

HO2S2

HO2S2 (B1) P0139

P0139

EC-219

HO2S2 (B1) P1146

P0138

EC-212

HO2S2 (B1) P1147

P0137

EC-207

HO2S2 (B2) P0159

P0159

EC-219

HO2S2 (B2) P1166

P0158

EC-212

HO2S2 (B2) P1167

P0157

EC-207