Nissan Altima L32. Instruction — part 466
ECM
EC-985
< ECU DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
39
Ground
R
Refrigerant pressure sensor
Input
[Engine is running]
• Warm-up condition
• Both A/C switch and blower
fan motor switch: ON (Com-
pressor operates)
1.0 - 4.0V
40
Ground
G
Sensor ground
(Refrigerant pressure sen-
sor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
41
Ground
O/B
Power steering pressure
sensor
Output
[Engine is running]
• Steering wheel: Being
turned
0.5 - 4.0V
[Engine is running]
• Steering wheel: Not being
turned
0.4 - 0.8V
42
Ground
G/R
Battery current sensor
Input
[Engine is running]
• Battery: Fully charged*
• Idle speed
2.6 - 3.5V
44
Ground
R/B
Sensor ground
(Battery current sensor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
45
Ground
B/W
A/F sensor 1 (bank 1)
Input
[Ignition switch: ON]
2.2V
46
Ground
Y
Engine coolant temperature
sensor
Input
[Engine is running]
0 - 4.8V
Output voltage varies with engine
coolant temperature.
47
Ground
G
Sensor power supply
(Throttle position sensor)
—
[Ignition switch: ON]
5V
48
Ground
B/P
Sensor ground
(Power steering pressure
sensor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
49
Ground
L
A/F sensor 1
Input
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
1.8V
Output voltage varies with air fuel
ratio.
50
Ground
L/Y
Intake air temperature sen-
sor
Input
[Engine is running]
0 - 4.8V
Output voltage varies with intake
air temperature.
51
Ground
O/L
Sensor power supply
—
[Ignition switch: ON]
5V
52
Ground
LG
Sensor ground
(Engine coolant temperature
sensor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
55
Ground
R/L
Sensor power supply
(Power steering pressure
sensor)
—
[Ignition switch: ON]
5V
56
Ground
G/B
Sensor ground
(Mass air flow sensor, Intake
air temperature sensor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
58
Ground
O
Mass air flow sensor
Input
[Engine is running]
• Warm-up condition
• Idle speed
0.9 - 1.1V
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
1.4 - 1.7V
59
Ground
G/W
Sensor power supply
[Camshaft position sensor
(PHASE)]
—
[Ignition switch: ON]
5V
Terminal No.
Wire
color
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
EC-986
< ECU DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
ECM
60
Ground
Y/B
Sensor ground
[Crankshaft position sensor
(POS)]
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
61
Ground
W
Knock sensor
Input
[Engine is running]
• Idle speed
2.5V
64
Ground
B/R
Sensor ground
[Camshaft position sensor
(PHASE)]
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
65
Ground
W
Crankshaft position sensor
(POS)
Input
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
3.0V
[Engine is running]
• Engine speed: 2,000 rpm
3.0V
67
Ground
—
Sensor ground
(Knock sensor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
69
Ground
W/R
Camshaft position sensor
(PHASE)
Input
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes de-
pending on rpm at idle
1.0 - 4.0
[Engine is running]
• Engine speed is 2,000 rpm
1.0 - 4.0
72
Ground
LG/B
Sensor power supply
(Refrigerant pressure sen-
sor)
—
[Ignition switch: ON]
5V
76
Ground
R/G
Sensor power supply
[Crankshaft position sensor
(POS)]
—
[Ignition switch: ON]
5V
77
Ground
W/L
Power supply for ECM
(Back-up)
Input
[Ignition switch: OFF]
BATTERY VOLTAGE
(11 - 14V)
Terminal No.
Wire
color
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0091GB
JMBIA0092GB
JMBIA0093GB
JMBIA0094GB
ECM
EC-987
< ECU DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
78
Ground
R/L
Intake valve timing control
solenoid valve
Output
[Engine is running]
• Warm-up condition
• Idle speed
0V
[Engine is running]
• Warm-up condition
• Engine speed: 2,000rpm
7 - 10V
81
Ground
W
Accelerator pedal position
sensor 1
Input
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-
leased
0.5 - 1.0V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-
pressed
4.2 - 4.8V
82
Ground
O
Accelerator pedal position
sensor 2
Input
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully re-
leased
0.25 - 0.5V
[Ignition switch: ON]
• Engine stopped
• Accelerator pedal: Fully de-
pressed
2.0 - 2.5V
83
Ground
GR
Sensor power supply
(Accelerator pedal position
sensor 1)
—
[Ignition switch: ON]
5V
84
Ground
B
Sensor ground
(Accelerator pedal position
sensor 1)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
85
Ground
G/Y
ASCD steering switch
Input
[Ignition switch: ON]
• ASCD steering switch: OFF
4V
[Ignition switch: ON]
• MAIN switch: Pressed
0V
[Ignition switch: ON]
• CANCEL switch: Pressed
1V
[Ignition switch: ON]
• RESUME/ACCELERATE
switch: Pressed
3V
[Ignition switch: ON]
• SET/COAST switch:
Pressed
2V
86
Ground
SB
EVAP control system pres-
sure sensor
Input
[Ignition switch: ON]
1.8 - 4.8V
87
Ground
BR
Sensor power supply
(Accelerator pedal position
sensor 2)
—
[Ignition switch: ON]
5V
88
—
O
Data link connector
Input/
Output
—
—
Terminal No.
Wire
color
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
JMBIA0095GB
EC-988
< ECU DIAGNOSIS >
[QR25DE EXCEPT FOR CALIFORNIA]
ECM
91
Ground
V
Sensor power supply
(EVAP control system pres-
sure sensor)
—
[Ignition switch: ON]
5V
92
Ground
R
Sensor ground
(ASCD steering switch)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
93
Ground
Y
Ignition switch
Input
[Ignition switch: OFF]
0V
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
94
—
V/W
Engine speed signal output
Output
—
—
95
Ground
Y
Fuel tank temperature sen-
sor
Input
[Engine is running]
0 - 4.8V
Output voltage varies with fuel
tank temperature.
96
Ground
GR
Sensor ground
(EVAP control system pres-
sure sensor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
97
—
P
CAN communication line
Input/
Output
—
—
98
—
L
CAN communication line
Input/
Output
—
—
100
Ground
G
Sensor ground
(Accelerator pedal position
sensor 2)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
102
Ground
R/B
PNP switch
Input
[Ignition switch: ON]
• Shift lever: P or N (CVT),
Neutral (M/T)
BATTERY VOLTAGE
(11 - 14V)
[Ignition switch: ON]
• Shift lever: Except above
0V
104
Ground
P
Sensor ground
(Fuel tank temperature sen-
sor)
—
[Engine is running]
• Warm-up condition
• Idle speed
0V
105
Ground
V
Power supply for ECM
Input
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
106
Ground
SB
Stop lamp switch
Input
[Ignition switch: OFF]
• Brake pedal: Fully released
0V
[Ignition switch: OFF]
• Brake pedal: Slightly de-
pressed
BATTERY VOLTAGE
(11 - 14V)
107
108
Ground
B
ECM ground
—
[Engine is running]
• Idle speed
Body ground
109
Ground
W
EVAP canister vent control
valve
Output
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
Terminal No.
Wire
color
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output
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