Nissan Altima L32. Instruction — part 508

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-1153

< FUNCTION DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

• The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.

• The B counter will be counted up when driving pattern B is satisfied without any malfunction.

• The MIL will turn off when the B counter reaches 3. (*2 in “OBD SYSTEM OPERATION CHART”)

<Driving Pattern C>

Driving pattern C means operating vehicle as per the following:

The following conditions should be satisfied at the same time:

Engine speed: (Engine speed in the freeze frame data)

± 375 rpm

Calculated load value: (Calculated load value in the freeze frame data) x (1

± 0.1) [%]

Engine coolant temperature (T) condition:

• When the freeze frame data shows lower than 70

°C (158°F), T should be lower than 70°C (158°F).

• When the freeze frame data shows higher than or equal to 70

°C (158°F), T should be higher than or equal to

70

°C (158°F).

Example:

If the stored freeze frame data is as per the following:

Engine speed: 850 rpm, Calculated load value: 30%, Engine coolant temperature: 80

°C (176°F)

To be satisfied with driving pattern C, the vehicle should run under the following conditions:

Engine speed: 475 - 1,225 rpm, Calculated load value: 27 - 33%, Engine coolant temperature: more than 70

°C

(158

°F)

• The C counter will be cleared when the malfunction is detected regardless of vehicle conditions above.

• The C counter will be counted up when vehicle conditions above are satisfied without the same malfunction.

• The DTC will not be displayed after C counter reaches 80.

• The 1st trip DTC will be cleared when C counter is counted once without the same malfunction after DTC is

stored in ECM.

Relationship Between MIL, DTC, 1st Trip DTC and Driving Patterns Except For “Misfire <Exhaust Quality Deteriora-
tion>”, “Fuel Injection System”

EC-1154

< FUNCTION DIAGNOSIS >

[VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

*1: When the same malfunction is de-

tected in two consecutive trips, MIL
will illuminate.

*2: MIL will turn off after vehicle is driven

3 times (pattern B) without any mal-
functions.

*3: When the same malfunction is de-

tected in two consecutive trips, the
DTC and the freeze frame data will be
stored in ECM.

JMBIA1418GB

ON BOARD DIAGNOSTIC (OBD) SYSTEM

EC-1155

< FUNCTION DIAGNOSIS >

[VQ35DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

Explanation for Driving Patterns Except for “Misfire <Exhaust Quality Deterioration>”, “Fuel Injection System”

<Driving Pattern A>

• The A counter will be cleared when the malfunction is detected regardless of (1) - (4).

• The A counter will be counted up when (1) - (4) are satisfied without the same malfunction.

• The DTC will not be displayed after the A counter reaches 40.

<Driving Pattern B>

Driving pattern B means operating vehicle as per the following:

All components and systems should be monitored at least once by the OBD system.

• The B counter will be cleared when the malfunction is detected once regardless of the driving pattern.

• The B counter will be counted up when driving pattern B is satisfied without any malfunctions.

• The MIL will turn off when the B counter reaches 3 (*2 in OBD SYSTEM OPERATION CHART).

CONSULT-III Function

INFOID:0000000004362007

FUNCTION

*: The following emission-related diagnostic information is cleared when the ECM memory is erased.
• Diagnostic trouble codes
• 1st trip diagnostic trouble codes
• Freeze frame data

*4: The DTC and the freeze frame data

will not be displayed any longer after
vehicle is driven 40 times (pattern A)
without the same malfunction.
(The DTC and the freeze frame data
still remain in ECM.)

*5: When a malfunction is detected for

the first time, the 1st trip DTC and the
1st trip freeze frame data will be
stored in ECM.

*6: 1st trip DTC will be cleared after vehi-

cle is driven once (pattern B) without
the same malfunction.

*7: When the same malfunction is de-

tected in the 2nd trip, the 1st trip
freeze frame data will be cleared.

AEC574

Diagnostic test mode

Function

Work Support

This mode enables a technician to adjust some devices faster and more accurately by following the in-
dications on the CONSULT-III unit.

Self Diagnostic Result

Self-diagnostic results such as 1st trip DTC, DTCs and 1st trip freeze frame data or freeze frame data
can be read and erased quickly.*

Data Monitor

Input/Output data in the ECM can be read.

Active Test

Diagnostic Test Mode in which CONSULT-III drives some actuators apart from the ECM and also shifts
some parameters in a specified range.

DTC & SRT Confirmation

The status of system monitoring tests and the self-diagnosis status/results can be confirmed.

Function Test

This mode is used to inform customers when the vehicle requires periodic maintenance.

ECU Part Number

ECM part number can be read.

EC-1156

< FUNCTION DIAGNOSIS >

[VQ35DE]

ON BOARD DIAGNOSTIC (OBD) SYSTEM

• 1st trip freeze frame data
• System readiness test (SRT) codes
• Test values

ENGINE CONTROL COMPONENT PARTS/CONTROL SYSTEMS APPLICATION

Item

DIAGNOSTIC TEST MODE

WORK

SUPPORT

SELF-DIAGNOSTIC

RESULTS

DATA

MONI-

TOR

ACTIVE

TEST

DTC & SRT

CONFIRMATION

DTC*1

FREEZE

FRAME
DATA*2

SRT STA-

TUS

DTC

WORK

SUP-

PORT

ENGINE CONTROL COMP

O

N

ENT P

A

RTS

INPUT

Crankshaft position sensor (POS)

×

×

×

Camshaft position sensor (PHASE)

×

×

×

Mass air flow sensor

×

×

Engine coolant temperature sensor

×

×

×

×

Engine oil temperature sensor

×

Air fuel ratio (A/F) sensor 1

×

×

×

×

Heated oxygen sensor 2

×

×

×

×

Vehicle speed signal

×

×

×

Accelerator pedal position sensor

×

×

Throttle position sensor

×

×

×

Fuel tank temperature sensor

×

×

×

EVAP control system pressure sensor

×

×

Intake air temperature sensor

×

×

×

Knock sensor

×

Refrigerant pressure sensor

×

Closed throttle position switch (accel-
erator pedal position sensor signal)

×

Air conditioner switch

×

Park/neutral position (PNP) signal

×

×

Stop lamp switch

×

×

Power steering pressure sensor

×

×

Battery voltage

×

Load signal

×

Primary speed sensor

×

×

Fuel level sensor

×

×

Battery current sensor

×

×

ASCD steering switch

×

×

ASCD brake switch

×

×