Infiniti M45 (Y34). Manual — part 353
TROUBLE DIAGNOSIS
EC-101
C
D
E
F
G
H
I
J
K
L
M
A
EC
35
Y/G
MIL
[Ignition switch: ON]
0 - 1.0V
[Engine is running]
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
38
W/G
Tachometer signal
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
3 - 6V
[Engine is running]
●
Engine speed: 2,500 rpm.
3 - 6V
39
OR
ASCD communication line
[Engine is running]
●
Idle speed
3 - 6V
41
GY
Fuel pump relay
[Ignition switch: ON]
●
For a few seconds after turning ignition
switch ON
[Engine is running]
0 - 1.0V
[Ignition switch: ON]
●
More than a few seconds after turning igni-
tion switch ON.
BATTERY VOLTAGE
(11 - 14V)
42
W/B
ECM relay
(Self shut-off)
[Engine is running]
[Ignition switch: OFF]
●
A few seconds after turning ignition switch
OFF
0 - 1.0V
[Ignition switch: OFF]
●
More than a few seconds after turning igni-
tion switch OFF
BATTERY VOLTAGE
(11 - 14V)
43
G/Y
Vacuum cut valve bypass
valve
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
47
R
Cooling fan speed control
solenoid valve
[Engine is running]
●
Idle speed
6.5 - 8V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB0046E
PBIB0047E
PBIB0048E
PBIB0049E
EC-102
TROUBLE DIAGNOSIS
53
W/G
Ignition switch
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
54
L/Y
EVAP canister purge vol-
ume control solenoid valve
[Engine is running]
●
Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
●
Engine speed is about 2,000 rpm (More than
100 seconds after starting engine).
BATTERY VOLTAGE
(11 - 14V)
59
SB
Start signal
[Ignition switch: ON]
Approximately 0V
[Ignition switch: START]
9 - 12V
63
P/L
Crankshaft position sensor
(POS)
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
1.0 - 2.0V
[Engine is running]
●
Engine speed: 2,000 rpm.
1.0 - 2.0V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB0050E
PBIB0051E
PBIB0052E
PBIB0053E
TROUBLE DIAGNOSIS
EC-103
C
D
E
F
G
H
I
J
K
L
M
A
EC
73
Y
Intake valve timing control
position sensor (bank 1)
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
0 - 1.0V
[Engine is running]
●
Engine speed: 2,000 rpm.
0 - 1.0V
74
W
Intake valve timing control
position sensor (bank 2)
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
0 - 1.0V
[Engine is running]
●
Engine speed: 2,000 rpm.
0 - 1.0V
80
GY/R
PNP switch
[Ignition switch: ON]
●
Selector lever: P or N.
Approximately 0V
[Ignition switch: ON]
●
Except above
Approximately 5V
84
L/W
Camshaft position sensor
(PHASE)
[Engine is running]
●
Warm-up condition
●
Idle speed
NOTE:
The pulse cycle changes depending on rpm at
idle.
1.0 - 4.0V
[Engine is running]
●
Engine speed: 2,000 rpm.
1.0 - 4.0V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB0054E
PBIB0055E
PBIB0054E
PBIB0055E
PBIB0056E
PBIB0057E
EC-104
TROUBLE DIAGNOSIS
87
L/W
Accelerator pedal position
sensor 1
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully released
More than 0.36V
[Ignition switch: ON]
●
Engine stopped
●
Accelerator pedal: Fully depressed
Less than 4.75V
88
P
Refrigerant pressure sen-
sor
[Engine is running]
●
Warm-up condition
●
Both A/C switch and blower switch: ON.
(Compressor operates.)
1.0 - 4.0V
89
B
Sensor ground
[Engine is running]
●
Warm-up condition
●
Idle speed
Approximately 0V
91
B/Y
Mass air flow sensor
[Engine is running]
●
Warm-up condition
●
Idle speed
1.1 - 1.5V
[Engine is running]
●
Warm-up condition
●
Engine speed: 2,500 rpm.
1.7 - 2.4V
92
PU/W
Fuel tank temperature sen-
sor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.
94
G
Sensor power supply
(Accelerator pedal position
sensor 2)
[Ignition switch: ON]
Approximately 2.5V
95
W
Power supply for ECM
(Back-up)
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
98
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
99
L
Intake air temperature sen-
sor
[Engine is running]
Approximately 0 - 4.8V
Output voltage varies with intake
air temperature.
100
BR
Sensor ground
(Accelerator pedal position
sensor 2)
[Ignition switch: ON]
Approximately 0V
103
L
Sensor power supply
[Ignition switch: ON]
Approximately 5V
106
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)
107
B
Fuel level sensor ground
[Engine is running]
●
Idle speed
Approximately 0V
TER-
MINAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
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