Nissan Altima L32. Instruction — 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

PG-3, "How to Handle Battery"

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

EC-498

< ECU DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

ECM

Wiring Diagram — ENGINE CONTROL SYSTEM —

INFOID:0000000004349551

AABWA0125GB

ECM

EC-499

< ECU DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

C

D

E

F

G

H

I

J

K

L

M

A

EC

N

P

O

AABWA0126GB

EC-500

< ECU DIAGNOSIS >

[QR25DE FOR CALIFORNIA]

ECM

AABWA0127GB