Nissan Frontier. Manual — part 612
ECM
EC-1019
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR MEXICO]
C
D
E
F
G
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EC
N
P
O
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
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
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
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
40km/h (25MPH) and 144km/h
(89MPH)
ASCD: Operating
ON
ASCD: Not operating
OFF
ALT DUTY
• Engine: Idle
0 - 80%
BAT CUR SEN
• Engine speed: Idle
• Battery: Fully charged*
2
• Shift lever: P or N
• Air conditioner switch: OFF
• No load
Approx. 2,600 - 3,500 mV
MONITOR ITEM
CONDITION
SPECIFICATION
EC-1020
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR MEXICO]
ECM
*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 terminal voltage, confirm that the battery is fully charged. Refer to
ECM Harness Connector Terminal Layout
INFOID:0000000009481705
ECM Terminal and Reference Value
INFOID:0000000009481706
PREPARATION
ALT DUTY SIG
• Power generation voltage variable control: Operating
ON
• Power generation voltage variable control: Not operating
OFF
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.
HO2 S2 DIAG1(B1)
DTC P0139 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0139 self-diagnosis (delayed response) is complete.
CMPLT
HO2 S2 DIAG1(B2)
DTC P0159 self-diagnosis (delayed response) is incomplete.
INCMP
DTC P0159 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
HO2 S2 DIAG2(B2)
DTC P0159 self-diagnosis (slow response) is incomplete.
INCMP
DTC P0159 self-diagnosis (slow response) is complete.
CMPLT
THRTL STK CNT B1
NOTE:
The item is indicated, but not used.
—
A/F-S ATMSPHRC
CRCT B1
Engine: After warming up, idle the engine
Varies depending on vehicle
environment.
A/F-S ATMSPHRC
CRCT B2
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 num-
ber of updates.
A/F-S ATMSPHRC
CRCT UP B2
Engine: Running
Varies depending on the num-
ber of updates.
MONITOR ITEM
CONDITION
SPECIFICATION
AWBIA2014ZZ
ECM
EC-1021
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR MEXICO]
C
D
E
F
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EC
N
P
O
ECM located in the engine room passenger side behind reservoir
tank.
ECM INSPECTION TABLE
Specification data are reference values and are measured between each terminal and ground.
Pulse signal is measured by CONSULT.
CAUTION:
Never use ECM ground terminals when measuring input/output voltage. Doing so may result in dam-
age to the ECMs transistor. Use a ground other than ECM terminals, such as the ground.
BBIA0537E
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
1
BR
ECM ground
[Engine is running]
• Idle speed
Body ground
2
G
A/F sensor 1 heater (Bank 1)
[Engine is running]
• Warm-up condition
• Idle speed
(More than 140 seconds after starting en-
gine)
Approximately 2.9 - 8.8V
3
V
Throttle control motor relay
power supply
[Ignition switch: ON]
BATTERY VOLTAGE
(11 - 14V)
4
L/W
Throttle control motor (Close)
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully released
0 - 14V
5
L/B
Throttle control motor (Open)
[Ignition switch: ON]
• Engine: Stopped
• Shift lever: D
• Accelerator pedal: Fully depressed
0 - 14V
PBIA8148J
PBIB1104E
PBIB1105E
EC-1022
< ECU DIAGNOSIS INFORMATION >
[VQ40DE FOR MEXICO]
ECM
6
R
Heated oxygen sensor 2
heater (Bank 2)
[Engine is running]
• Engine speed is 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
0 - 1.0V
[Ignition switch: ON]
• Engine: Stopped
[Engine is running]
• Engine speed: Above 3,600 rpm
BATTERY VOLTAGE
(11 - 14V)
10
B
Intake valve timing control so-
lenoid valve (Bank 2)
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
7 - 12V
11
L
Intake valve timing control so-
lenoid valve (Bank 1)
[Engine is running]
• Warm-up condition
• Idle speed
BATTERY VOLTAGE
(11 - 14V)
[Engine is running]
• Warm-up condition
• Engine speed: 2,500 rpm
7 - 12V
12
P
Power steering pressure sen-
sor
[Engine is running]
• Steering wheel: Being turned
0.5 - 4.5V
[Engine is running]
• Steering wheel: Not being turned
0.4 - 0.8V
13
G
Crankshaft position sensor
(POS)
[Engine is running]
• Warm-up condition
• Idle speed
NOTE:
The pulse cycle changes depending on rpm
at idle
Approximately 10V
[Engine is running]
• Engine speed: 2,000 rpm
Approximately 10V
TER-
MI-
NAL
NO.
WIRE
COLOR
ITEM
CONDITION
DATA (DC Voltage)
PBIB1790E
PBIB1790E
PBIB1041E
PBIB1042E
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