Infiniti QX56 (JA60). Manual - part 454

EC-468

< ECU DIAGNOSIS >

[VK56DE]

ECM

Driving Pattern

• The time required for each diagnosis varies with road surface conditions, weather, altitude, individual driving

habits, etc.

Zone A refers to the range where the time, required for the diagnosis under normal conditions*, is the short-

est.

Zone B refers to the range where the diagnosis can still be performed if the diagnosis is not completed within

zone A.

*: Normal conditions refer to the following:

PBIB3622E

ECM

EC-469

< ECU DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

• Sea level

• Flat road

• Ambient air temperature: 20 - 30

°C (68 - 86°F)

• Diagnosis is performed as quickly as possible under normal conditions.

Under different conditions [For example: ambient air temperature other than 20 - 30

°C (68 - 86°F)], diagno-

sis may also be performed.

Pattern 1:

• The engine is started at the engine coolant temperature of 

−10 to 35°C (14 to 95°F)

(where the voltage between the ECM terminal 73 and ground is 3.0 - 4.3V).

• The engine must be operated at idle speed until the engine coolant temperature is greater than 70

°C

(158

°F) (where the voltage between the ECM terminal 73 and ground is lower than 1.4V).

• The engine is started at the fuel tank temperature of warmer than 0

°C (32°F) (where the voltage

between the ECM terminal 107 and ground is less than 4.1V).

Pattern 2:

• When steady-state driving is performed again even after it is interrupted, each diagnosis can be conducted.

In this case, the time required for diagnosis may be extended.

Pattern 3:

• Operate vehicle following the driving pattern shown in the figure.

• Release the accelerator pedal during decelerating vehicle speed

from 90 km/h (56 MPH) to 0 km/h (0 MPH).

Pattern 4:

• The accelerator pedal must be held very steady during steady-

state driving.

• If the accelerator pedal is moved, the test must be conducted all

over again.

*1: Depress the accelerator pedal until vehicle speed is 90 km/h (56

MPH), then release the accelerator pedal and keep it released for

more than 10 seconds. Depress the accelerator pedal until vehicle

speed is 90 km/h (56 MPH) again.

*2: Checking the vehicle speed with GST is advised.

Suggested Transmission Gear Position

Set the selector lever in the D position with the overdrive switch turned ON.

TEST VALUE AND TEST LIMIT

The following is the information specified in Service $06 of SAE J1979.

The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while

being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the

maximum or minimum value and is compared with the test value being monitored.

These data (test value and test limit) are specified by On Boad Monitor ID(OBDMID), Test ID (TID), Unit and

Scaling ID and can be displayed on the GST screen.

The items of the test value and test limit will be displayed with GST screen which items are provided by the

ECM. (eg., if the bank 2 is not applied on this vehicle, only the items of the bank 1 is displayed)

PBIB2244E

EC-470

< ECU DIAGNOSIS >

[VK56DE]

ECM

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID

HO2S

01H

Air fuel ratio (A/F) sensor 1 
(Bank 1)

P0131

83H

0BH

Minimum sensor output voltage for test 
cycle

P0131

84H

0BH

Maximum sensor output voltage for test 
cycle

P0130

85H

0BH

Minimum sensor output voltage for test 
cycle

P0130

86H

0BH

Maximum sensor output voltage for test 
cycle

P0133

87H

04H

Response rate: Response ratio (Lean to 
Rich)

P0133

88H

04H

Response rate: Response ratio (Rich to 
Lean)

P2A00

89H

84H

The amount of shift in air fuel ratio

P2A00

8AH

84H

The amount of shift in air fuel ratio

P0130

8BH

0BH

Difference in sensor output voltage

P0133

8CH

83H

Response gain at the limited frequency

02H

Heated oxygen sensor 2 
(Bank 1)

P0138

07H

0CH

Minimum sensor output voltage for test 
cycle

P0137

08H

0CH

Maximum sensor output voltage for test 
cycle

P0138

80H

0CH

Sensor output voltage

P0139

81H

0CH

Difference in sensor output voltage

03H

Heated oxygen sensor 3 
(Bank 1)

P0143

07H

0CH

Minimum sensor output voltage for test 
cycle

P0144

08H

0CH

Maximum sensor output voltage for test 
cycle

P0146

80H

0CH

Sensor output voltage

P0145

81H

0CH

Difference in sensor output voltage

ECM

EC-471

< ECU DIAGNOSIS >

[VK56DE]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

HO2S

05H

Air fuel ratio (A/F) sensor 1 
(Bank 2)

P0151

83H

0BH

Minimum sensor output voltage for test 
cycle

P0151

84H

0BH

Maximum sensor output voltage for test 
cycle

P0150

85H

0BH

Minimum sensor output voltage for test 
cycle

P0150

86H

0BH

Maximum sensor output voltage for test 
cycle

P0153

87H

04H

Response rate: Response ratio (Lean to 
Rich)

P0153

88H

04H

Response rate: Response ratio (Rich to 
Lean)

P2A03

89H

84H

The amount of shift in air fuel ratio

P2A03

8AH

84H

The amount of shift in air fuel ratio

P0150

8BH

0BH

Difference in sensor output voltage

P0153

8CH

83H

Response gain at the limited frequency

06H

Heated oxygen sensor 2
(Bank 2)

P0158

07H

0CH

Minimum sensor output voltage for test 
cycle

P0157

08H

0CH

Maximum sensor output voltage for test 
cycle

P0158

80H

0CH

Sensor output voltage

P0159

81H

0CH

Difference in sensor output voltage

07H

Heated oxygen sensor 3 
(Bank2)

P0163

07H

0CH

Minimum sensor output voltage for test 
cycle

P0164

08H

0CH

Maximum sensor output voltage for test 
cycle

P0166

80H

0CH

Sensor output voltage

P0165

81H

0CH

Difference in sensor output voltage

CATA-
LYST

21H

Three way catalyst function 
(Bank1)

P0420

80H

01H

O2 storage index

P0420

82H

01H

Switching time lag engine exhaust index 
value

P2423

83H

0CH

Difference in 3rd O2 sensor output volt-
age

P2423

84H

84H

O2 storage index in HC trap catalyst

22H

Three way catalyst function 
(Bank2)

P0430

80H

01H

O2 storage index

P0430

82H

01H

Switching time lag engine exhaust index 
value

P2424

83H

0CH

Difference in 3rd O2 sensor output volt-
age

P2424

84H

84H

O2 storage index in HC trap catalyst

Item

OBD-

MID

Self-diagnostic test item

DTC

Test value and Test 

limit

(GST display)

Description

TID

Unit and 

Scaling 

ID