Nissan Altima L32. Manual - part 344
ECM
EC-497
< ECU DIAGNOSIS >
[QR25DE FOR CALIFORNIA]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)
**: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to
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)
110
Ground
G/B
ASCD brake switch
Input
[Ignition switch: ON]
• Brake pedal: Slightly de-
pressed (CVT)
• Brake pedal and clutch ped-
al: Slightly depressed (M/T)
0V
[Ignition switch: ON]
• Brake pedal: Fully released
(CVT)
• Brake pedal and/or clutch
pedal: Fully released (M/T)
BATTERY VOLTAGE
(11 - 14V)
111
112
Ground
B
ECM ground
—
[Engine is running]
• Idle speed
Body ground
Terminal No.
Wire
color
Description
Condition
Value
(Approx.)
+
-–
Signal name
Input/
Output