Nissan Sentra. Manual — part 346
EC-80
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
ECM
CANCEL SW
• Ignition switch: ON
CANCEL switch: Pressed
On
CANCEL switch: Released
Off
RESUME/ACC SW
• Ignition switch: ON
RESUME/ACCELERATE switch:
Pressed
On
RESUME/ACCELERATE switch: Re-
leased
Off
SET SW
• Ignition switch: ON
SET/COAST switch: Pressed
On
SET/COAST switch: Released
Off
BRAKE SW1
• Ignition switch: ON
Brake pedal: Fully released
On
Brake pedal: Slightly depressed
Off
BRAKE SW2
• Ignition switch: ON
Brake pedal: Fully released
Off
Brake pedal: Slightly depressed
On
VHCL SPD CUT
• Ignition switch: ON
Non
LO SPEED CUT
• Ignition switch: ON
Non
AT OD MONITOR
• Ignition switch: ON
Off
AT OD CANCEL
• Ignition switch: ON
Off
CRUISE LAMP
• Ignition switch: ON
MAIN switch: Pressed at the 1st time
→
at the 2nd time
On
→ Off
SET LAMP
NOTE:
The item is indicated, but not used.
—
ALT DUTY
• Engine speed: Idle
0 - 80%
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged
*2
• Selector lever: P or N (CVT)
• Shifter lever: Neutral (M/T)
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
A/F ADJ-B1
• Engine: running
–0.450 - 0.330
TUMBLE POS SEN
• Ignition switch: ON
• Engine coolant temperature: Be-
tween 0
°C (32°F) and 45°C
(113
°F)
Accelerator pedal: Fully released
Less than 2.4 V
Accelerator pedal: Fully depressed
More than 3.5 V
P/N POSI SW
• Ignition switch: ON
• Selector lever: P or N (CVT)
• Shifter lever: Neutral (M/T)
On
Selector lever: Except above
Off
INT/A TEMP SE
• Ignition switch: ON
Indicates intake air tempera-
ture
AC PRESS SEN
• Engine speed: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
VTC DTY EX B1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
0 - 2%
2,000 rpm
Approx. 0- 90%
EVAP LEAK DIAG
• Ignition switch: ON
Indicates the condition of
EVAP leak diagnosis.
EVAP DIAG READY
• Ignition switch: ON
Indicates the ready condition
of EVAP leak diagnosis.
BAT TEMP SEN
• Engine: After warming up, idle the engine
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Indicates the temperature
around the battery.
Monitor Item
Condition
Values/Status
ECM
EC-81
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
*1: Accelerator pedal position sensor 2 signal and throttle position sensor 2 signal are converted by ECM internally. Thus, they differ
from ECM terminals voltage signal.
*2: Before measuring the voltage, confirm that the battery is fully charged. Refer to
TERMINAL LAYOUT
PHYSICAL VALUES
NOTE:
• ECM is located in the engine room left side near battery.
• Specification data are reference values and are measured between each terminal and ground.
• Pulse signal is measured by CONSULT.
THRTL STK CNT B1
NOTE:
The item is indicated, but not used.
—
A/F SEN1 DIAG1
(B1)
DTC P015A and P015B self-diagnosis is incomplete.
INCMP
DTC P015A and P015B self-diagnosis is complete.
CMPLT
A/F SEN1 DIAG2
(B1)
DTC P014C and P014D self-diagnosis is incomplete.
INCMP
DTC P014C and P014D self-diagnosis is complete.
CMPLT
A/F SEN1 DIAG3
(B1)
The vehicle condition is not within the diagnosis range of DTC P014C, P014D,
P015A or P015B.
ABSNT
The vehicle condition is within the diagnosis range of DTC P014C, P014D,
P015A or P015B.
PRSNT
HO2 S2 DIAG1 (B1)
DTC P0139 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0139 self-diagnosis (delayed response) is complete.
CMPLT
HO2 S2 DIAG2 (B1)
DTC P0139 self-diagnosis (slow response) is incomplete.
INCMP
DTC P0139 self-diagnosis (slow response) is complete.
CMPLT
EOP SENSOR
• Engine: After warming up
• Selector lever: P or N (CVT)
• Shifter lever: Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
Approx. 1,450 mV
2,000 rpm
Approx. 2,850 mV
SPORT MODE
SWITCH
ignition switch: ON
Press the sport mode switch
On
Release the sport mode switch
Off
ECO MODE
SWITCH
ignition switch: ON
Press the ECO mode switch
On
Release the ECO mode switch
Off
A/F-S ATMSPHRC
CRCT B1
Engine: After warming up, idle the engine
Varies depending on vehicle
environment.
A/F-S ATMSPHRC
CRCT UP B1
Engine: Running
Varies depending on the
number of updates.
Monitor Item
Condition
Values/Status
JSBIA0505ZZ
EC-82
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
ECM
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
1
(P)
128
(B/Y)
Throttle control motor
(Close)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (CVT)
• Shifter lever: 1st (M/T)
• Accelerator pedal: Fully released
1.8 V
2
(G)
128
(B/Y)
Throttle control motor
power supply
Input
[Ignition switch: ON]
Battery voltage
(11 - 14 V)
3
(W)
128
(B/Y)
Throttle control motor
(Open)
Output
[Ignition switch: ON]
• Engine stopped
• Selector lever: D (CVT)
• Shifter lever: 1st (M/T)
• Accelerator pedal: Fully depressed
3.2 V
4
(W)
8
(B)
Knock sensor
Input
[Engine is running]
• Idle speed
2.5 V
5
(G)
128
(B/Y)
Intake manifold tuning
valve motor (Close)
Output
[Ignition switch ON]
• Engine coolant temperature: Normal
operating condition
• Accelerator pedal: Depressed
→ ful-
ly released
Battery voltage appears for about
1 second.
6
(R)
128
(B/Y)
Intake manifold tuning
valve motor power supply
Input
[Ignition switch: ON]
Battery voltage
(11 - 14 V)
7
(R)
128
(B/Y)
Intake manifold tuning
valve motor (Open)
Output
[Ignition switch ON]
• Engine coolant temperature: normal
operating condition
• Accelerator pedal: Fully released
→
depressed
Battery voltage appears for about
1 second.
8
(B)
—
Sensor ground
(Knock sensor)
—
—
—
9
(BR)
10
(SB)
13
(O)
14
(V)
128
(B/Y)
Fuel injector No. 4
Fuel injector No. 3
Fuel injector No. 1
Fuel injector No. 2
Output
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending
on rpm at idle
Battery voltage
(11 - 14 V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,000 rpm
Battery voltage
(11 - 14 V)
JMBIA0326GB
JMBIA0324GB
JSBIA3228ZZ
JMBIA0090GB
ECM
EC-83
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
12
(B)
—
ECM ground
—
—
—
16
(B)
—
ECM ground
—
—
—
17
(L)
128
(B/Y)
EVAP canister purge vol-
ume control solenoid
valve
Output
[Engine is running]
• Idle speed
• Accelerator pedal: Not depressed
even slightly, after engine starting
Battery voltage
(11 - 14 V)
[Engine is running]
• Engine speed: About 2,000 rpm
(More than 100 seconds after start-
ing engine.)
10 V
18
(GR)
128
(B/Y)
Fuel pump relay
Output
[Ignition switch: ON]
• For 1 second after turning ignition
switch ON
[Engine is running]
0 - 1.0 V
[Ignition switch: ON]
• More than 1 second after turning ig-
nition switch ON
Battery voltage
(11 - 14 V)
21
(Y)
128
(B/Y)
Throttle control motor re-
lay
Output
[Ignition switch: OFF]
Battery voltage
(11 - 14 V)
[Ignition switch: ON]
0 - 1.0 V
22
(W)
23
(BR)
Heated oxygen sensor 2
Input
[Engine is running]
• Revving engine from idle to 3,000
rpm quickly after the following condi-
tions are met
- Engine: after warming up
- Keeping the engine speed between
3,500 and 4,000 rpm for 1 minute
and at idle for 1 minute under no
load
0 - 1.0 V
23
(BR)
—
Sensor ground
(Heated oxygen sensor 2)
—
—
—
25
(Y)
26
(P)
Engine oil temperature
sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with engine
oil temperature.
26
(P)
—
Sensor ground
(Engine oil temperature
sensor)
—
—
—
27
(LG)
—
Sensor ground
(Engine coolant tempera-
ture sensor)
—
—
—
28
(V)
27
(LG)
Engine coolant tempera-
ture sensor
Input
[Engine is running]
0 - 4.8 V
Output voltage varies with engine
coolant temperature.
Terminal No.
(Wire color)
Description
Condition
Value
(Approx.)
+
−
Signal name
Input/
Output
JMBIA0087GB
JMBIA0328GB
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