2011 INFINITI QX56 Factory Service Manual

Page 2105 of 5598

INFINITI QX56 2011  Factory Service Manual 
ECM
EC-81
< ECU DIAGNOSIS INFORMATION > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
23
(V) 45
(L/O) Low fuel pressure sensor Input [Engine is running]
 Warm-up condition
 Idle speed
2.4 - 3.6 V
[Engin

Page 2106 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-82
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
37
(V) 175
(B) Cooling fan speed Input [Ignition switch: ON]
 Engine stopped
5 V
[Engine is running]
 Idle speed
 After warm-up condition BATTERY VO

Page 2107 of 5598

INFINITI QX56 2011  Factory Service Manual 
ECM
EC-83
< ECU DIAGNOSIS INFORMATION > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
48
(L/W) 175
(B) A/F sensor 1 heater (bank 1) Input [Engine is running]
 Warm-up condition
 Idle speed
(More than 14

Page 2108 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-84
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
54
(G/R) 175
(B) Intake valve timing control sole-
noid valve (bank 2)
Output[Engine is running]
 Warm-up condition
 Idle speed
BATTERY VOLTAGE
(11 -

Page 2109 of 5598

INFINITI QX56 2011  Factory Service Manual 
ECM
EC-85
< ECU DIAGNOSIS INFORMATION > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
64
(V/W) 175
(B) EVAP canister purge volume 
control solenoid valve
Output[Engine is running]
 Idle speed
 Accelerat

Page 2110 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-86
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
78
(L/R) 175
(B) A/F sensor 1 (bank 2) Input [Engine is running]
 Warm-up condition
 Engine speed: 2,000 rpm2.2 - 2.8V
Output voltage varies with air

Page 2111 of 5598

INFINITI QX56 2011  Factory Service Manual 
ECM
EC-87
< ECU DIAGNOSIS INFORMATION > [VK56VD]
C
D
E
F
G H
I
J
K L
M A
EC
NP
O
91
(R) 97
(W) Throttle position sensor 1 Input [Ignition switch: ON]
 Engine: Stopped
 Selector lever: D position


Page 2112 of 5598

INFINITI QX56 2011  Factory Service Manual 
EC-88
< ECU DIAGNOSIS INFORMATION >[VK56VD]
ECM
101
(R)
102 (R) 175
(B) Fuel injector No. 1 (HI)
Fuel injector No. 6 (HI)
Input[Engine is running]
 Warm-up condition
 Idle speed
NOTE:
The pulse cyc