2007 INFINITI QX56 Factory Service Manual

Page 1185 of 3061

INFINITI QX56 2007  Factory Service Manual EC-102
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
AWBWA0157G

Page 1186 of 3061

INFINITI QX56 2007  Factory Service Manual TROUBLE DIAGNOSIS
EC-103
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
ECM Harness Connector Terminal LayoutINFOID:0000000003531624
ECM Terminal and Reference ValueINFOID:0000000003531625
PR

Page 1187 of 3061

INFINITI QX56 2007  Factory Service Manual EC-104
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
5 L/B Throttle control motor (Open)[Ignition switch: ON]
• Engine: Stopped
• Selector lever: D
• Accelerator pedal: Fully depressed0 - 14V
6GRHea

Page 1188 of 3061

INFINITI QX56 2007  Factory Service Manual TROUBLE DIAGNOSIS
EC-105
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
13 OCrankshaft position sensor 
(POS)[Engine is running]
•Warm-up condition
• Idle speed
NOTE:
The pulse cycle chan

Page 1189 of 3061

INFINITI QX56 2007  Factory Service Manual EC-106
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
21
22
23
44O/L
BR
GR/W
OFuel injector No. 5
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 7[Engine is running]
•Warm-up condition
• Idl

Page 1190 of 3061

INFINITI QX56 2007  Factory Service Manual TROUBLE DIAGNOSIS
EC-107
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O
40
41
42
63Y/G
P
L
GFuel injector No. 6
Fuel injector No. 4 
Fuel injector No. 2
Fuel injector No. 8[Engine is running]

Page 1191 of 3061

INFINITI QX56 2007  Factory Service Manual EC-108
< SERVICE INFORMATION >
TROUBLE DIAGNOSIS
51 W Mass air flow sensor[Engine is running]
•Warm-up condition
• Idle speed1.0 - 1.3V
[Engine is running]
•Warm-up condition
• Engine speed: 2

Page 1192 of 3061

INFINITI QX56 2007  Factory Service Manual TROUBLE DIAGNOSIS
EC-109
< SERVICE INFORMATION >
C
D
E
F
G
H
I
J
K
L
MA
EC
N
P O73 Y/BEngine coolant temperature 
sensor[Engine is running]Approximately 0 - 4.8V
Output voltage varies with engine 
coo