2008 INFINITI QX56 Factory Service Manual

Page 1769 of 4083

INFINITI QX56 2008  Factory Service Manual EC-470
< ECU DIAGNOSIS >[VK56DE]
ECM
How to Display SRT Status
 
WITH CONSULT-III
Selecting “SRT STATUS” in “DTC CO NFIRMATION” mode with CONSULT-III.
For items whose SRT codes are set, a “C

Page 1770 of 4083

INFINITI QX56 2008  Factory Service Manual ECM
EC-471
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
• When any SRT codes are not set, MIL will flash periodically for 10 seconds.
How to Set SRT Code
To set all SRT codes, self-dia

Page 1771 of 4083

INFINITI QX56 2008  Factory Service Manual EC-472
< ECU DIAGNOSIS >[VK56DE]
ECM
Driving Pattern
• The time required for each diagnosis varies with road su
rface conditions, weather, altitude, individual driving
habits, etc.
Zone A refers to

Page 1772 of 4083

INFINITI QX56 2008  Factory Service Manual ECM
EC-473
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
• Sea level
• Flat road
• Ambient air temperature: 20 - 30
°C (68 - 86 °F)
• Diagnosis is performed as quickly as possib

Page 1773 of 4083

INFINITI QX56 2008  Factory Service Manual EC-474
< ECU DIAGNOSIS >[VK56DE]
ECM
ItemOBD-
MID Self-diagnostic test item
DTCTest value and Test 
limit
(GST display) Description
TID Unit and 
Scaling  ID
HO2S 01H
Air fuel ratio (A/F) sensor 1 
(B

Page 1774 of 4083

INFINITI QX56 2008  Factory Service Manual ECM
EC-475
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
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

Page 1775 of 4083

INFINITI QX56 2008  Factory Service Manual EC-476
< ECU DIAGNOSIS >[VK56DE]
ECM
EGR 
SYSTEM31H EGR function P0400 80H 96H
Low Flow Faults: EGR temp 
change rate (short term)
P0400 81H 96H Low Flow Faults: EGR temp 
change rate (long term)
P040

Page 1776 of 4083

INFINITI QX56 2008  Factory Service Manual ECM
EC-477
< ECU DIAGNOSIS > [VK56DE]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
FUEL 
SYSTEM
81H
Fuel injection system function 
(Bank 1) P0171 or P0172 80H 2FH Long term fuel trim
P0171 or P0172 81H 24H
The nu