Nissan Sentra. Manual — part 345
EC-76
< SYSTEM DESCRIPTION >
[MRA8DE]
DIAGNOSIS SYSTEM (ECM)
Since the “PERMANENT DTC STATUS” screen displays the previous trip information, repeat the
following twice to update the information: “Ignition switch OFF”, “Wait for more than 10 seconds”
and “Ignition switch ON”.
NOTE:
This mode is not used in regions that permanent DTCs are not regulated by law.
SRT WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to set the SRT while monitoring the SRT status.
PERMANENT DTC WORK SUPPORT Mode
This mode enables a technician to drive a vehicle to complete the driving pattern that is required for erasing
permanent DTC.
NOTE:
This mode is not used in regions that permanent DTCs are not regulated by law.
JSBIA0062GB
ECM
EC-77
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
ECU DIAGNOSIS INFORMATION
ECM
Reference Value
INFOID:0000000009758390
VALUES ON THE DIAGNOSIS TOOL
NOTE:
• The following table includes information (items) inapplicable to this vehicle. For information (items) applica-
ble to this vehicle, refer to CONSULT display items.
• Numerical values in the following table are reference values.
• These values are input/output values that ECM receives/transmits and may differ from actual operations.
Example: The ignition timing shown by the timing light may differ from the ignition timing displayed on the data
monitor. This occurs because the timing light shows a value calculated by ECM according to signals received
from the cam shaft position sensor and other sensors related to ignition timing.
For outlines of following items, refer to
Monitor Item
Condition
Values/Status
ENG SPEED
• Run engine and compare CONSULT value with the tachometer indication.
Almost the same speed as
the tachometer indication.
MAS A/F SE-B1
See
B/FUEL SCHDL
See
A/F ALPHA-B1
See
COOLANT TEMP/S
• Engine: After warming up
More than 70
°C (158°F)
A/F SEN1 (B1)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm
Fluctuates around 2.2 V
HO2S2 (B1)
• Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
0 - 0.3 V
←→ Approx. 0.6 -
1.0 V
HO2S2 MNTR(B1)
• Revving engine from idle up to 3,000 rpm quickly after the following conditions
are met.
- Engine: After warming up
- After keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at
idle for 1 minute under no load
LEAN
←→ RICH
VHCL SPEED SE
• Turn drive wheels and compare CONSULT value with the speedometer indi-
cation.
Almost the same speed as
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14 V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0 V
Accelerator pedal: Fully depressed
4.2 - 4.8 V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.5 - 1.0 V
Accelerator pedal: Fully depressed
4.2 - 4.8 V
TP SEN 1-B1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D (CVT)
• Shifter lever: 1st (M/T)
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Selector lever: D
• Shifter lever: 1st (M/T)
Accelerator pedal: Fully released
More than 0.36 V
Accelerator pedal: Fully depressed
Less than 4.75 V
FUEL T/TMP SE
• Ignition switch: ON
Indicates fuel tank tempera-
ture
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8 V
FUEL LEVEL SE
• Ignition switch: ON
Depending on fuel level of
fuel tank
EC-78
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
ECM
START SIGNAL
• Ignition switch ON
→ START → ON (start switch is released)
Off
→ On → Off
CLSD THL POS
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
On
Accelerator pedal: Slightly depressed
Off
AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
Off
Air conditioner switch: ON
(A/C compressor operates)
On
PW/ST SIGNAL
• Engine: After warming up, idle the
engine
Steering wheel: Not being turned
Off
Steering wheel: Being turned
On
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch: ON
and/or Lighting switch: 2nd position
On
Rear window defogger switch and lighting
switch: OFF
Off
IGNITION SW
• Ignition switch: ON
→ OFF → ON
On
→ Off → On
HEATER FAN SW
• Engine: After warming up, idle the
engine
Heater fan switch: ON
On
Heater fan switch: OFF
Off
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
Off
Brake pedal: Slightly depressed
On
INJ PULSE-B1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
3
° - 13° BTDC
2,000 rpm
35
° - 55° BTDC
CAL/LD VALUE
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
10% - 35%
2,500 rpm
10% - 35%
MASS AIRFLOW
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
Approx. 2.9 g/s
2,500 rpm
Approx. 5.5 g/s
PURG VOL C/V
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal: Not depressed even
slightly, after engine starting.)
0%
2,000 rpm
0% - 90%
INT/V TIM(B1)
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
−5°– 5° CA
2,000 rpm
Approx. 0
° - 20° CA
EXH/V TIM B1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
Idle
−5° - 5° CA
2,000 rpm
Approx. 0
° - 40° CA
INT/V SOL (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%
SWRL CONT S/V
• Ignition switch: ON
• Engine coolant temperature: Be-
tween 0
°C (32°F) and 45°C
(113
°F)
Accelerator pedal: Fully released
On
Accelerator pedal: Fully depressed
Off
Monitor Item
Condition
Values/Status
ECM
EC-79
< ECU DIAGNOSIS INFORMATION >
[MRA8DE]
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VIAS S/V-1
• Engine: After warming up
• Selector lever: P or N
• Air conditioner switch: OFF
• No load
When revving engine up to 5,250 rpm
quickly and release the accelerator pedal.
Off
→ On → Off
AIR COND RLY
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
Off
Air conditioner switch: ON
(Compressor operates)
On
FUEL PUMP RLY
• For 1 second after turning ignition switch: ON
• Engine running or cranking
On
• Except above
Off
VENT CONT/V
• Ignition switch: ON
Off
THRTL RELAY
• Ignition switch: ON
On
COOLING FAN
• Engine: After warming up, idle the
engine
• Air conditioner switch: OFF
Engine coolant temperature is 97
°C
(207
°F) or less
Off
Engine coolant temperature between
98
°C (208°F) and 99°C (210°F) or more
Low
Engine coolant temperature between
100
°C (212°F) or more
Hi
• Engine: After warming up, idle the
engine
• Air conditioner switch: ON
• Refrigerant pressure is less than
1,280 kPa (12.80 bar, 13.05 kg/
cm
2
, 185.6 psi)
Engine coolant temperature is 97
°C
(207
°F) or less
Low
Engine coolant temperature between
98
°C (208°F) and 99°C (210°F) or more
Low
Engine coolant temperature between
100
°C (212°F) or more
Hi
HO2S2 HTR (B1)
• Engine speed: Below 3,600 rpm after the following conditions 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
On
• Engine speed: Above 3,600 rpm
Off
ALT DUTY SIG
• Power generation voltage variable control: Operating
On
• Power generation voltage variable control: Not operating
Off
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as
the tachometer indication
VEHICLE SPEED
• Turn drive wheels and compare CONSULT value with the speedometer indi-
cation.
Almost the same speed as
the speedometer indication
IDL A/V LEARN
• Engine: running
Idle air volume learning has not been per-
formed yet.
YET
Idle air volume learning has already been
performed successfully.
CMPLT
TRVL AFTER MIL
• Ignition switch: ON
Vehicle has traveled after MIL has turned
ON.
0 - 65,535 km
(0 - 40,723 miles)
ENG OIL TEMP
• Engine: After warming up
More than 70
°C (158°F)
A/F S1 HTR(B1)
• Engine: After warming up, idle the engine
(More than 260 seconds after starting engine.)
4 - 100%
VHCL SPEED SE
• Turn drive wheels and compare CONSULT value with the speedometer indi-
cation.
Almost the same speed as
the speedometer indication
SET VHCL SPD
• Engine: Running
ASCD: Operating
The preset vehicle speed is
displayed
MAIN SW
• Ignition switch: ON
MAIN switch: Pressed
On
MAIN switch: Released
Off
Monitor Item
Condition
Values/Status
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