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Nissan Frontier. Manual - part 492

ECM

EC-539

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

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

SHIELD

Sensor ground
(Knock sensor)

[Engine is running]
• Idle speed

Body ground

Camshaft position sensor
(PHASE) (Bank 2)

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes depending on rpm
at idle

1.0 - 4.0V

[Engine is running]
• Engine speed: 2,000 rpm

1.0 - 4.0V

Camshaft position sensor
(PHASE) (Bank 1)

[Engine is running]
• Warm-up condition
• Idle speed

NOTE:
The pulse cycle changes depending on rpm
at idle

1.0 - 4.0V

[Engine is running]
• Engine speed: 2,000 rpm

1.0 - 4.0V

Sensor power supply
(Refrigerant pressure sensor)

[Ignition switch: ON]

Approximately 5V

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

PBIB1041E

PBIB1042E

PBIB1039E

PBIB1040E

PBIB1039E

PBIB1040E

EC-540

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

Accelerator pedal position
sensor 1

[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully released

0.65 - 0.87V

[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully depressed

More than 4.3V

Accelerator pedal position
sensor 2

[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully released

0.28 - 0.48V

[Ignition switch: ON]
• Engine: Stopped
• Accelerator pedal: Fully depressed

More than 2.0

Sensor power supply
(APP sensor 1)

[Ignition switch: ON]

Approximately 5V

100

Sensor ground
(APP sensor 1)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

101

ASCD steering switch

[Ignition switch: ON]
• ASCD steering switch: OFF

Approximately 4V

[Ignition switch: ON]
• MAIN switch: Pressed

Approximately 0V

[Ignition switch: ON]
• CANCEL switch: Pressed

Approximately 1V

[Ignition switch: ON]
• RESUME/ACCELERATE switch: Pressed

Approximately 3V

[Ignition switch: ON]
• SET/COAST switch: Pressed

Approximately 2V

102

EVAP control system pres-
sure sensor

[Ignition switch: ON]

Approximately 1.8 - 4.8V

103

Sensor power supply
(APP sensor 2)

[Ignition switch: ON]

Approximately 5V

104

Data link connector

[Ignition switch: ON]
• CONSULT or GST: disconnected

Approximately 5V - Battery volt-
age (11 - 14V)

106

EVAP canister vent control
valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

107

Sensor power supply
(EVAP control system pres-
sure sensor)

[Ignition switch: ON]

Approximately 5V

108

Sensor ground
(ASCD steering switch)

—

109

W/R

Ignition switch

[Ignition switch: OFF]

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

111

Fuel tank temperature sensor [Engine is running]

Approximately 0 - 4.8V
Output voltage varies with fuel
tank temperature.

112

Sensor ground
(EVAP control system pres-
sure sensor)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

113

CAN communication line

—

114

CAN communication line

—

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

ECM

EC-541

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

: Average voltage for pulse signal (Actual pulse signal can be confirmed by oscilloscope.)

*1: Before measuring the terminal voltage, confirm that the battery is fully charged. Refer to

PG-4, "How to Handle Battery"

*2: M/T models
*3: A/T models

Fail-Safe Chart

INFOID:0000000009481219

When the DTC listed below is detected, the ECM enters the fail-safe mode and the MIL illuminates.

116

Sensor ground
(APP sensor 2)

[Engine is running]
• Warm-up condition
• Idle speed

Approximately 0V

117

PNP signal

[Ignition switch: ON]
• Shift lever: P or N (A/T), Neutral (M/T)

Approximately 0V

[Ignition switch: ON]
• Except above position

BATTERY VOLTAGE
(11 - 14V)

121

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14V)

122

Stop lamp switch

[Ignition switch: OFF]
• Brake pedal: Fully released

Approximately 0V

[Ignition switch: OFF]
• Brake pedal: Slightly depressed

BATTERY VOLTAGE
(11 - 14V)

123
124

ECM ground

[Engine is running]
• Idle speed

Body ground

126

Brake pedal position switch

[Ignition switch: ON]
• Brake pedal: Slightly depressed

Approximately 0V

[Ignition switch: ON]
• Brake pedal: Fully released

BATTERY VOLTAGE
(11 - 14V)

127
128

ECM ground

[Engine is running]
• Idle speed

Body ground

TER-

MINAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

DTC No.

Detected items

Engine operating condition in fail-safe mode

P0101
P0102
P0103

Mass air flow sensor circuit Engine speed will not rise more than 2,400 rpm due to the fuel cut.

P0117
P0118

Engine coolant tempera-
ture sensor circuit

Engine coolant temperature will be determined by ECM based on the following condition.
CONSULT displays the engine coolant temperature decided by ECM.

Condition

Engine coolant temperature decided

(CONSULT display)

Just as ignition switch is turned ON
or START

°C (104°F)

Approx. 4 minutes after engine
starting

°C (176°F)

Except as shown above

40 - 80

°C (104 - 176°F)

(Depends on the time)

When the fail-safe system for engine coolant temperature sensor is activated, the cooling
fan operates while engine is running.

P0122
P0123
P0222
P0223
P2135

Throttle position sensor

The ECM controls the electric throttle control actuator in regulating the throttle opening in
order for the idle position to be within +10 degrees.
The ECM regulates the opening speed of the throttle valve to be slower than the normal
condition.
Therefore, the acceleration will be poor.

EC-542

< ECU DIAGNOSIS INFORMATION >

[VQ40DE FOR USA AND CANADA]

ECM

• When there is an open circuit on MIL circuit, the ECM cannot warn the driver by lighting up MIL when there

is malfunction on engine control system.

Therefore, when electrical controlled throttle and part of ECM related diagnoses are continuously detected

as NG for 5 trips, ECM warns the driver that engine control system malfunctions and MIL circuit is open by

means of operating fail-safe function.

The fail-safe function also operates when above diagnoses except MIL circuit are detected and demands the

driver to repair the malfunction.

DTC Inspection Priority Chart

INFOID:0000000009481220

If some DTCs are displayed at the same time, perform inspections one by one based on the following priority

chart.

NOTE:

• If DTC UXXXX is displayed with other DTC, first perform the trouble diagnosis for DTC U1XXXX.

• If DTC P0607 is displayed with other DTC, first perform the trouble diagnosis for DTC P0607.Refer to

EC-829, "Description"

P0196
P0197
P0198

Engine oil temperature
sensor

Intake valve timing control does not function.

P0643

Sensor power supply

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2100
P2103

Throttle control motor relay ECM stops the electric throttle control actuator control, throttle valve is maintained at a

fixed opening (approx. 5 degrees) by the return spring.

P2101

Electric throttle control
function

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2118

Throttle control motor

ECM stops the electric throttle control actuator control, throttle valve is maintained at a
fixed opening (approx. 5 degrees) by the return spring.

P2119

Electric throttle control ac-
tuator

(When electric throttle control actuator does not function properly due to the return spring
malfunction:)
ECM controls the electric throttle actuator because of regulating the throttle opening
around the idle position. The engine speed will not rise more than 2,000 rpm.

(When throttle valve opening angle in fail-safe mode is not in specified range:)
ECM controls the electric throttle control actuator by regulating the throttle opening to 20
degrees or less.

(When ECM detects the throttle valve is stuck open:)
While the vehicle is being driven, it slows down gradually by fuel cut. After the vehicle
stops, the engine stalls.
The engine can restart in N or P position (A/T), Neutral position (M/T), and engine speed
will not exceed 1,000 rpm or more.

P2122
P2123
P2127
P2128
P2138

Accelerator pedal position
sensor

DTC No.

Detected items

Engine operating condition in fail-safe mode

Engine speed will not rise more than 2,500 rpm due to the fuel cut

Content .. 490 491 492 493 ..