Nissan Frontier. Instruction — part 374
DIAGNOSIS SYSTEM (ECM)
EC-67
< SYSTEM DESCRIPTION >
[QR25DE]
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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.
EC-68
< ECU DIAGNOSIS INFORMATION >
[QR25DE]
ECM
ECU DIAGNOSIS INFORMATION
ECM
CONSULT Reference Value in Data Monitor Mode
INFOID:0000000009480746
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 camshaft position sensor and other sensors related to ignition timing.
• For outlines of following items, refer to
.
MONITOR ITEM
CONDITION
SPECIFICATION
ENG SPEED
• Run engine and compare the CONSULT value with 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
.
COOLAN 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 1.5V
HO2S2 (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
- Engine: After warming up
- Keeping engine speed between 3,500 and 4,000 rpm for 1 minute and at idle for
1 minute under no load.
0 - 0.3V
←→ Approx. 0.6 -
1.0V
HO2S2 MNTR (B1)
• Revving engine from idle to 3,000 rpm quickly after the following conditions are
met.
- Engine: After warming up
- 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 the CONSULT value with speedometer indica-
tion.
Almost the same speed as
the speedometer indica-
tion.
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14V
ACCEL SEN 1
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.6 - 0.95V
Accelerator pedal: Fully depressed
Less than 4.75V
TP SEN 1-B1
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Shift lever: D (A/T) or 1st (M/T)
Accelerator pedal: Fully released
More than 0.36V
Accelerator pedal: Fully depressed
Less than 4.75V
FUEL T/TMP SE
• Ignition switch: ON
Indicates fuel tank temper-
ature.
FUEL LEVEL SE
• Ignition switch: ON
Depending on fuel level of
fuel tank.
EVAP SYS PRES
• Ignition switch: ON
Approx. 1.8 - 4.8V
START SIGNAL
• Ignition switch: ON
→ START → ON
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 en-
gine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.)
ON
ECM
EC-69
< ECU DIAGNOSIS INFORMATION >
[QR25DE]
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P/N POSI SW
• Ignition switch: ON
Shift lever: P or N (A/T), Neutral (M/T)
ON
Shift lever: Except above
OFF
PW/ST SIGNAL
• Engine: After warming up, idle the en-
gine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned
ON
LOAD SIGNAL
• Ignition switch: ON
Lighting switch: 2nd
ON
Lighting switch: OFF
OFF
IGNITION SW
• Ignition switch: ON
→ OFF → ON
ON
→ OFF → ON
HEATER FAN SW
• Engine: After warming up, idle the en-
gine
Heater fan: Operating
ON
Heater fan: Not operating
OFF
BRAKE SW
• Ignition switch: ON
Brake pedal: Fully released
OFF
Brake pedal: Slightly depressed
ON
INJ PULSE-B1
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
2.0 - 3.0 msec
2,000 rpm
1.9 - 4.0 msec
IGN TIMING
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
10
° - 20° BTDC
2,000 rpm
25
° - 45° BTDC
CAL/LD VALUE
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
10% - 35%
2,500 rpm
10% - 35%
MASS AIRFLOW
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
1.0 - 4.0 g/s
2,500 rpm
4.0 - 12.0 g/s
PURG VOL C/V
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
(Accelerator pedal is not depressed
even slightly, after engine starting)
0%
2,000 rpm
—
INT/V TIM (B1)
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
−5° - 5°CA
2,000 rpm
Approx. 0
° - 20°CA
INT/V SOL (B1)
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral (M/T)
• Air conditioner switch: OFF
• No load
Idle
0% - 2%
2,000 rpm
Approx. 0% - 60%
AIR COND RLY
• Engine: After warming up, idle the en-
gine
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 conditions
OFF
VENT CONT/V
• Ignition switch: ON
OFF
THRTL RELAY
• Ignition switch: ON
ON
HO2S2 HTR (B1)
• Engine speed: Below 3,600 rpm after the following conditions are met.
- Engine: After warming up
- Keeping 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
MONITOR ITEM
CONDITION
SPECIFICATION
EC-70
< ECU DIAGNOSIS INFORMATION >
[QR25DE]
ECM
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as
the speedometer indica-
tion.
VEHICLE SPEED
• Turn drive wheels and compare CONSULT value with the speedometer indica-
tion.
Almost the same speed as
the speedometer indica-
tion
IDL A/V LEARN
• Engine: running
Idle air volume learning has not been
performed 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 mile)
A/F S1 HTR (B1)
• Engine: After warming up, idle the engine
0 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch and blower fan switch: ON (Compressor operates)
1.0 - 4.0V
VHCL SPEED SE
• Turn drive wheels and compare CONSULT value with the speedometer indica-
tion.
Almost the same speed as
the speedometer indica-
tion
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
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
(ASCD brake switch)
• Ignition switch: ON
• Brake pedal: Fully released (A/T)
• Clutch pedal and/or brake pedal: Fully
released (M/T)
ON
• Brake pedal: Slightly depressed (A/T)
• Clutch pedal and/or brake pedal:
Slightly depressed (M/T)
OFF
BRAKE SW2
(STOP lamp switch)
• 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
• MAIN switch: ON
• When vehicle speed is between
40 km/h (25 MPH) and 144 km/h (89
MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
• Engine: Idle
0 - 80%
MONITOR ITEM
CONDITION
SPECIFICATION
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