Infiniti Q45. Manual — part 368
TROUBLE DIAGNOSIS
EC-111
C
D
E
F
G
H
I
J
K
L
M
A
EC
68
L
Sensor power supply
(Power steering pressure
sensor)
[Ignition switch: ON]
Approximately 5V
69
W
Throttle position sensor 2
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully released
Less than 4.75V
[Ignition switch: ON]
●
Engine stopped
●
Selector lever: D
●
Accelerator pedal: Fully depressed
More than 0.36V
70
P
Refrigerant pressure sensor
[Engine is running]
●
Warm-up condition
●
Both A/C switch and blower fan motor
switch: ON (Compressor operates)
1.0 - 4.0V
72
W
Intake valve timing control
position sensor (bank 1)
[Engine is running]
●
Warm-up condition
●
Idle speed
0 - 1.0V
[Engine is running]
●
Engine speed: 2,000rpm
0 - 1.0V
73
Y/B
Engine coolant temperature
sensor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with
engine coolant temperature.
74
B
Heated oxygen sensor 2
(bank 2)
[Engine is running]
●
Revving engine from idle to 3,000 rpm
quickly after the following conditions are met
–
Engine: After warming up
–
After keeping the engine speed between
3,500 and 4,000 rpm for 1 minute and at idle
for 1 minute under no load
0 - Approximately 1.0V
78
OR
Sensor ground
(Heated oxygen sensor 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
82
L
Sensor ground
(APP sensor 1)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
83
L
Sensor ground
(APP sensor 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
84
Y/B
Electrical load signal
(Headlamp switch)
[Ignition switch: ON]
●
Lighting switch: 2nd position
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
●
Lighting switch: OFF
Approximately 0V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB2046E
EC-112
TROUBLE DIAGNOSIS
85
PU
Data link connector
[Ignition switch: ON]
●
CONSULT-II or GST: Disconnected
Approximately 5V - Battery volt-
age (11 - 14V)
86
P
CAN communication line
[Ignition switch: ON]
Approximately 1.1 - 2.3V
Output voltage varies with the
communication status.
89
SB
Cooling fan relay -3(High)
[Engine is running]
●
Cooling fan: Not operating
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Cooling fan: High speed operating
0 - 1.0V
90
R
Sensor power supply
(APP sensor 1)
[Ignition switch: ON]
Approximately 5V
91
B
Sensor power supply
(APP sensor 2)
[Ignition switch: ON]
Approximately 5V
93
L/R
Electrical load signal
(Rear window defogger
switch)
[Ignition switch: ON]
●
Rear window defogger switch: ON
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
●
Rear window defogger switch: OFF
Approximately 0V
94
L
CAN communication line
[Ignition switch: ON]
Approximately 2.6 - 3.2V
Output voltage varies with the
communication status.
96
SB
Heater fan switch
[Engine is running]
●
Heater fan switch: ON
Approximately 0V
[Engine is running]
●
Heater fan switch: OFF
BATTERY VOLTAGE
(11 - 14V)
97
L/OR
Cooling fan relay-2 (Low)
[Engine is running]
●
Cooling fan: Not operating
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Cooling fan: Low speed operating
0 - 1.0V
98
R
Accelerator pedal position
sensor 2
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully released
0.15 - 0.60V
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
1.95 - 2.40V
99
G/OR
ICC steering switch
(models with ICC system)
[Ignition switch: ON]
●
ICC steering switch: OFF
Approximately 4.3V
[Ignition switch: ON]
●
MAIN switch: Pressed
Approximately 0V
[Ignition switch: ON]
●
CANCEL switch: Pressed
Approximately 1.3V
[Ignition switch: ON]
●
RESUME/ACCELERATE switch: Pressed
Approximately 3.7V
[Ignition switch: ON]
●
SET/COAST switch: Pressed
Approximately 3V
[Ignition switch: ON]
●
DISTANCE switch: Pressed
Approximately 2.2V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
TROUBLE DIAGNOSIS
EC-113
C
D
E
F
G
H
I
J
K
L
M
A
EC
99
G/OR
ASCD steering switch
(models with ASCD system)
[Ignition switch: ON]
●
ASCD steering switch: OFF
Approximately 4V
[Ignition switch: ON]
●
MAIN switch: Pressed
Approximately 0V
[Ignition switch: ON]
●
CANCEL switch: Pressed
Approximately 1V
[Ignition switch: ON]
●
RESUME/ACCELERATE switch: Pressed
Approximately 3V
[Ignition switch: ON]
●
SET/COAST switch: Pressed
Approximately 2V
101
R/W
Stop lamp switch
[Ignition switch: OFF]
●
Brake pedal: Fully released
Approximately 0V
[Ignition switch: OFF]
●
Brake pedal: Slightly depressed
BATTERY VOLTAGE
(11 - 14V)
102
GY/R
PNP switch
[Ignition switch: ON]
●
Selector lever: P or N
Approximately 0V
[Ignition switch: ON]
●
Selector lever: Except above
BATTERY VOLTAGE
(11 - 14V)
104
OR
Throttle control motor relay
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
0 - 1.0V
106
W
Accelerator pedal position
sensor 1
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully released
0.5 - 1.0V
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
3.9 - 4.7V
107
PU/W
Fuel tank temperature sen-
sor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.
108
Y/PU
ICC brake switch (models
witch ICC system)
ASCD brake switch (models
witch ASCD system)
[Ignition switch: ON]
●
Brake pedal: Slightly depressed
Approximately 0V
[Ignition switch: ON]
●
Brake pedal: Fully released
BATTERY VOLTAGE
(11 - 14V)
109
W/G
Ignition switch
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
110
Y
Air conditioner switch
[Engine is running]
●
Both air conditioner switch and blower fan
motor switch: ON (Compressor operates)
Approximately 0V
[Engine is running]
●
Air conditioner switch: OFF
Approximately 5V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
EC-114
TROUBLE DIAGNOSIS
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
111
W/B
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
●
For a few seconds after turning ignition
switch OFF
0 - 1.5V
[Ignition switch: OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
112
G/Y
Vacuum cut valve bypass
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
113
GY
Fuel pump relay
[Ignition switch: ON]
●
For 5 seconds after turning ignition switch
ON
[Engine is running]
0 - 1.5V
[Ignition switch: ON]
●
More than 5 seconds after turning ignition
switch ON
BATTERY VOLTAGE
(11 - 14V)
115
116
B
B
ECM ground
[Engine is running]
●
Idle speed
Body ground
117
L/Y
EVAP canister vent control
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
119
120
R
R
Power supply for ECM
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
121
W
Power supply for ECM
(Back-up)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
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