Nissan Maxima. Manual - part 510

EC-524

< ECU DIAGNOSIS INFORMATION >

[VQ35DE]

ECM

PURG VOL C/V

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle
(Accelerator pedal: Not depressed even 
slightly, after engine starting.)

0%

2,000 rpm

—

INT/V TIM (B1)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

−5° - 5°CA

2,000 rpm

Approx. 0

° - 30°CA

INT/V TIM (B2)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

−5° - 5°CA

2,000 rpm

Approx. 0

° - 30°CA

EXH/V TIM (B1)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

−5° - 5°CA

Around 2,500 rpm while the engine speed 
is rising

Approx. 0

° - 30°CA

EXH/V TIM (B2)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

−5° - 5°CA

Around 2,500 rpm while the engine speed 
is rising

Approx. 0

° - 30°CA

INT/V SOL (B1)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

0% - 2%

2,000 rpm

Approx. 0% - 50%

INT/V SOL (B2)

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

0% - 2%

2,000 rpm

Approx. 0% - 50%

VTC DTY EX B1

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

0% - 2%

Around 2,500 rpm while the engine speed 
is rising

Approx. 0% - 70%

VTC DTY EX B2

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Idle

0% - 2%

Around 2,500 rpm while the engine speed 
is rising

Approx. 0% - 70%

VIAS S/V-1

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

When revving engine up to 5,000 rpm 
quickly

OFF 

→ON → OFF

VIAS S/V-2

• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

When revving engine up to 5,000 rpm 
quickly

OFF 

→ON → OFF

AIR COND RLY

• Engine: After warming up, idle the 

engine

Air conditioner switch: OFF

OFF

Air conditioner switch: ON
(Compressor operates)

ON

ENGINE MOUNT

• Engine: After warming up

Below 950 rpm

IDLE

Above 950 rpm

TRVL

FUEL PUMP RLY

• For 1 second after turning ignition switch: ON
• Engine running or cranking

ON

• Except above

OFF

VENT CONT/V

• Ignition switch: ON

OFF

THRTL RELAY

• Ignition switch: ON

ON

Monitor Item

Condition

Values/Status

ECM

EC-525

< ECU DIAGNOSIS INFORMATION >

[VQ35DE]

C

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COOLING FAN

• Engine: After warming up, idle the 

engine

• Air conditioner switch: OFF

Engine coolant temperature: 97

°C 

(206

°F) or less

OFF

Engine coolant temperature: Between 
98

°C (208°F) and 99°C (210°F)

Low

Engine coolant temperature: Between 
100

°C (212°F) and 104°C (219°F)

Mid

Engine coolant temperature: 105

°C 

(221

°F) or more

Hi

HO2S2 HTR (B1)

• 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

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 value with the speedometer indi-

cation.

Almost the same speed as 
the speedometer indication

IDL A/V LEARN

• Engine: Running

Idle air volume learning has not been per-
formed yet.

YET

Idle air volume learning has already been 
performed successfully.

CMPLT

ENG OIL TEMP

• Engine: After warming up

More than 70

°C (158°F)

TRVL AFTER MIL

• Ignition switch: ON

Vehicle has traveled after MIL has illumi-
nated.

0 - 65,535 km
(0 - 40,723 miles)

A/F S1 HTR (B1)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

A/F S1 HTR (B2)

• Engine: After warming up, idle the engine

(More than 140 seconds after starting engine)

4 - 100%

AC PRESS SEN

• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)

1.0 - 4.0 V

VHCL SPEED SE

• Turn drive wheels and compare CONSULT 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

RESUME/ACC SW

• Ignition switch: ON

RESUME/ACCELERATE switch: 
Pressed

ON

RESUME/ACCELERATE switch: Re-
leased

OFF

SET SW

• Ignition switch: ON

SET/COAST switch: Pressed

ON

SET/COAST switch: Released

OFF

BRAKE SW1
(ASCD brake switch)

• Ignition switch: ON

Brake pedal: Fully released

ON

Brake pedal: Slightly depressed

OFF

Monitor Item

Condition

Values/Status

EC-526

< ECU DIAGNOSIS INFORMATION >

[VQ35DE]

ECM

BRAKE SW2
(Stop lamp switch)

• Ignition switch: ON

Brake pedal: Fully released

OFF

Brake pedal: Slightly depressed

ON

VHCL SPD CUT

• Ignition switch: ON

NON

LO SPEED CUT

• Ignition switch: ON

NON

AT OD MONITOR

• Ignition switch: ON

OFF

AT OD CANCEL

• Ignition switch: ON

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

EXH V/T LEARN

• Engine: Running

Exhaust Valve Timing Control Learning 
has not been performed yet.

YET

Exhaust Valve Timing Control Learning 
has not been performed yet.

CMPLT

ALT DUTY SIG

• Power generation voltage variable control: Operating

ON

• Power generation voltage variable control: Not operating

OFF

A/F ADJ-B1

• Engine: Running

−0.330 - 0.330

A/F ADJ-B2

• Engine: Running

−0.330 - 0.330

BAT CUR SEN

• Engine speed: Idle
• Battery: Fully charged*

2

• Selector lever: P or N
• Air conditioner switch: OFF
• No  load

Approx. 2,600 - 3,500 mV

ALT DUTY

• Engine: Idle

0 - 80%

THRTL STK CNT B1

NOTE:
The item is indicated, but not used.

—

EVAP LEAK DIAG

Ignition switch: ON

Indicates the condition of 

EVAP leak diagnosis.

EVAP DIAG READY

Ignition switch: ON

Indicates the ready condition 

of EVAP leak diagnosis.

A/F SEN1 DIAG1 
(B1)

DTC P015A and P015B self-diagnosis incomplete.

INCMP

DTC P015A and P015B self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG1 
(B2)

DTC P015C and P015D self-diagnosis incomplete.

INCMP

DTC P015C and P015D self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG2 
(B1)

DTC P014C and P014D self-diagnosis incomplete.

INCMP

DTC P014C and P014D self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG2 
(B2)

DTC P014E and P014F self-diagnosis incomplete.

INCMP

DTC P014E and P014F self-diagnosis is complete.

CMPLT

A/F SEN1 DIAG3 
(B1)

The vehicle condition is not within the diagnosis range of DTC P014C, P014D, 
P015A or P015B.

ABSNT

The vehicle condition is within the diagnosis range of DTC P014C, P014D, 
P015A or P015B.

PRSNT

A/F SEN1 DIAG3 
(B2)

The vehicle condition is not within the diagnosis range of DTC P014E, P014F, 
P015C or P015D.

ABSNT

The vehicle condition is within the diagnosis range of DTC P014E, P014F, 
P015C or P015D.

PRSNT

HO2 S2 DIAG1(B1)

DTC P0139 self-diagnosis (delayed response) is incomplete.

INCMP

DTC P0139 self-diagnosis (delayed response) is complete.

CMPLT

Monitor Item

Condition

Values/Status

ECM

EC-527

< ECU DIAGNOSIS INFORMATION >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

*1: 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.
*2: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to 

PG-2, "How to Handle Battery"

.

TERMINAL LAYOUT

PHYSICAL VALUES

NOTE:

• ECM is located in the engine room left side near battery. For this inspection, remove passenger side instru-

ment lower panel.

• Specification data are reference values.

• Pulse signal is measured by CONSULT.

HO2 S2 DIAG1(B2)

DTC P0159 self-diagnosis (delayed response) is incomplete.

INCMP

DTC P0159 self-diagnosis (delayed response) is complete.

CMPLT

HO2 S2 DIAG2(B1)

DTC P0139 self-diagnosis (slow response) is incomplete.

INCMP

DTC P0139 self-diagnosis (slow response) is complete.

CMPLT

HO2 S2 DIAG2(B2)

DTC P0159 self-diagnosis (slow response) is incomplete.

INCMP

DTC P0159 self-diagnosis (slow response) is complete.

CMPLT

A/F-S ATMSPHRC 
CRCT B1

Engine: After warming up, idle the engine

Varies depending on vehicle 
environment.

A/F-S ATMSPHRC 
CRCT B2

Engine: After warming up, idle the engine

Varies depending on vehicle 
environment.

A/F-S ATMSPHRC 
CRCT UP B1

Engine: Running

Varies depending on the 
number of updates.

A/F-S ATMSPHRC 
CRCT UP B2

Engine: Running

Varies depending on the 
number of updates.

Monitor Item

Condition

Values/Status

PBIA9221J