Nissan Frontier. Manual — part 489
DIAGNOSIS SYSTEM (ECM)
EC-527
< SYSTEM DESCRIPTION >
[VQ40DE FOR USA AND CANADA]
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*: DTC P1456 does not apply to D40 models but appears in DTC Work Support Mode screens.
SRT & P-DTC MODE
SRT STATUS Mode
• For items whose SRT codes are set, “CMPLT” is displayed on the CONSULT screen; for items whose SRT
codes are not set, “INCMP” is displayed.
• “SRT STATUS” provides the presence or absence of permanent DTCs stored in ECM memory.
PERMANENT DTC STATUS Mode
How to display permanent DTC status
1. Turn ignition switch OFF and wait at least 10 seconds.
2. Turn ignition switch ON.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON.
5. Select “PERMANENT DTC STATUS” in “DTC & SRT CONFIRMATION” mode with CONSULT.
NOTE:
Permanent DTCs stored in ECM memory are displayed on the CONSULT screen to show if a driving pat-
tern required for erasing permanent DTCs is complete (CMPLT) or incomplete (INCMP).
CAUTION:
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.
HO2S2
HO2S2(B1) P1146
P0138
HO2S2(B1) P1147
P0137
HO2S2(B1) P0139
P0139
HO2S2(B2) P1166
P0158
HO2S2(B2) P1167
P0157
HO2S2(B2) P0159
P0159
Test mode
Test item
Corresponding DTC No.
Reference page
JSBIA0062GB
EC-528
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
ECM
ECU DIAGNOSIS INFORMATION
ECM
CONSULT Reference Value in Data Monitor Mode
INFOID:0000000009481216
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
SPECIFICATION
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
A/F ALPHA-B2
See
COOLAN TEMP/S
• Engine: After warming up
More than 70
°C (158°F)
A/F SEN1 (B1)
A/F SEN1 (B2)
• Engine: After warming up
Maintaining engine speed at 2,000 rpm Fluctuates around 2.2 V
HO2S2 (B1)
HO2S2 (B2)
• 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 - 1.0
V
HO2S2 MNTR (B1)
HO2S2 MNTR (B2)
• 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 CONSULT value with the speedometer in-
dication.
Almost the same speed as the
speedometer indication
BATTERY VOLT
• Ignition switch: ON (Engine stopped)
11 - 14 V
ACCEL SEN 1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.65 - 0.87 V
Accelerator pedal: Fully depressed
More than 4.3 V
ACCEL SEN 2*
1
• Ignition switch: ON
(Engine stopped)
Accelerator pedal: Fully released
0.56 - 0.96V
Accelerator pedal: Fully depressed
More than 4.0 V
TP SEN 1-B1
TP SEN 2-B1*
1
• Ignition switch: ON
(Engine stopped)
• Shift lever: D (A/T), 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 temperature
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
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
ECM
EC-529
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
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AIR COND SIG
• Engine: After warming up, idle the
engine
Air conditioner switch: OFF
OFF
Air conditioner switch: ON
(Compressor operates.)
ON
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
engine
Steering wheel: Not being turned
OFF
Steering wheel: Being turned.
ON
LOAD SIGNAL
• Ignition switch: ON
Rear window defogger switch is ON
and/or lighting switch is in 2nd
ON
Rear window defogger switch is OFF
and lighting switch is OFF
OFF
IGNITION SW
• Ignition switch: ON
→ OFF → ON
ON
→ OFF → ON
HEATER FAN SW
• Engine: After warming up, idle the
engine
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
INJ PULSE-B2
• 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 - 2.9 msec
IGN TIMING
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral
(M/T)
• Air conditioner switch: OFF
• No load
Idle
13
° - 18° 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
5% - 35%
2,500 rpm
5% - 35%
MASS AIRFLOW
• Engine: After warming up
• Shift lever: P or N (A/T), Neutral
(M/T)
• Air conditioner switch: OFF
• No load
Idle
2.0 - 6.0 g/s
2,500 rpm
7.0 - 20.0 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)
INT/V TIM (B2)
• 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
° - 30°CA
INT/V SOL (B1)
INT/V SOL (B2)
• 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% - 50%
SWRL CONT S/V
• Ignition switch: ON
• Engine coolant temperature: Be-
tween –12
°C (10°F) and 20°C
(68
°F)
Accelerator pedal: Fully released
ON
Accelerator pedal: Fully depressed
OFF
MONITOR ITEM
CONDITION
SPECIFICATION
EC-530
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR USA AND CANADA]
ECM
VIAS S/V-1
• Engine: After warming up
2,200 - 3,300 rpm
ON
Except above conditions
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 conditions
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: 97
°C
(207
°F) or less
OFF
Engine coolant temperature: Between
98
°C (208°F) and 104°C (219°F)
LOW
Engine coolant temperature: 105
°C
(221
°F) or more
HI
HO2S2 HTR (B1)
HO2S2 HTR (B2)
• 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
I/P PULLY SPD
• Vehicle speed: More than 20 km/h (12 MPH)
Almost the same speed as the
speedometer indication
VEHICLE SPEED
• Turn drive wheels and compare the CONSULT value with speedometer in-
dication.
Almost the same speed as the
speedometer indication
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)
A/F S1 HTR (B2)
• Engine: After warming up, idle the engine
4 - 100%
AC PRESS SEN
• Engine: Idle
• Both A/C switch blower fan switch: ON (Compressor operates)
1.0 - 4.0 V
VHCL SPEED SE
• Turn drive wheels and compare speedometer indication with the CONSULT
value.
Almost the same speed as the
CONSULT value
SET VHCL SPD
• Engine: Running
ASCD: Operating.
The preset vehicle speed is dis-
played.
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
MONITOR ITEM
CONDITION
SPECIFICATION
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