Index Manuals Nissan Pathfinder (2012 year) - Service and Repair Manual

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Nissan Pathfinder (2012 year). Manual - part 309

ECM

EC-553

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

C

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EC

N

P

O

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

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

PG-5, "How to Handle Battery"

Fail-Safe Chart

INFOID:0000000007358450

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

104

O

Throttle control motor relay

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14 V)

[Ignition switch: ON]

0 - 1.0 V

106

R

Accelerator pedal position sen-
sor 1

[Ignition switch: ON]

• Engine: Stopped
• Accelerator pedal: Fully released

0.65 - 0.87 V

[Ignition switch: ON]

• Engine: Stopped
• Accelerator pedal: Fully depressed

More than 4.3 V

107

Y

Fuel tank temperature sensor

[Engine is running]

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

108

LG

ASCD brake switch

[Ignition switch: ON]

• Brake pedal: Slightly depressed

Approximately 0 V

[Ignition switch: ON]

• Brake pedal: Fully released

BATTERY VOLTAGE
(11 - 14 V)

109

W/R

Ignition switch

[Ignition switch: OFF]

0 V

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

111

BR

ECM relay
(Self shut-off)

[Engine is running]
[Ignition switch: OFF]

• For a few seconds after turning ignition

switch OFF

0 - 1.5 V

[Ignition switch: OFF]

• More than a few seconds after turning ig-

nition switch OFF

BATTERY VOLTAGE
(11 - 14 V)

113

V

Fuel pump relay

[Ignition switch: ON]

• For 1 second after turning ignition switch

ON

[Engine is running]

0 - 1.5 V

[Ignition switch: ON]

• More than 1 second after turning ignition

switch ON

BATTERY VOLTAGE
(11 - 14 V)

115
116

B
GR

ECM ground

[Engine is running]

• Idle speed

Body ground

117

G

EVAP canister vent control valve

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

119

120

R
P

Power supply for ECM

[Ignition switch: ON]

BATTERY VOLTAGE
(11 - 14 V)

121

R/B

Power supply for ECM
(Back up)

[Ignition switch: OFF]

BATTERY VOLTAGE
(11 - 14 V)

TER-

MI-

NAL

NO.

WIRE

COLOR

ITEM

CONDITION

DATA (DC Voltage)

August 2012

2012 Pathfinder

EC-554

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

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

40

°

C (104

°

F)

Approx. 4 minutes or more after
engine starting.

80

°

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.
So, the acceleration will be poor.

P0500

Vehicle speed sensor

The cooling fan operates (Highest) while engine is running.

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 by 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 because of fuel cut. After the
vehicle stops, the engine stalls.
The engine can restart in N or P position, and engine speed will not exceed 1,000 rpm or
more.

P2122
P2123
P2127
P2128
P2138

Accelerator pedal 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.
So, the acceleration will be poor.

Engine operating condition in fail-safe mode

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

August 2012

2012 Pathfinder

ECM

EC-555

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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EC

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DTC Inspection Priority Chart

INFOID:0000000007358451

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

chart.

DTC Index

INFOID:0000000007358452

EMISSION-RELATED DIAGNOSTIC INFORMATION ITEMS

Priority

Detected items (DTC)

1

• U0101 U1001 CAN communication line
• P0101 P0102 P0103 Mass air flow sensor
• P0111 P0112 P0113 P0127 Intake air temperature sensor
• P0116 P0117 P0118 P0125 Engine coolant temperature sensor
• P0122 P0123 P0222 P0223 P1225 P1226 P2135 Throttle position sensor
• P0128 Thermostat function
• P0181 P0182 P0183 Fuel tank temperature sensor
• P0327 P0328 P0332 P0333 Knock sensor
• P0335 Crankshaft position sensor (POS)
• P0340 Camshaft position sensor (PHASE)
• P0460 P0461 P0462 P0463 Fuel level sensor
• P0500 Vehicle speed sensor
• P0605 P0607 ECM
• P0643 Sensor power supply
• P0700 TCM
• P0705 Transmission range switch
• P0850 Park/neutral position (PNP) switch
• P1550 P1551 P1552 P1553 P1554 Battery current sensor
• P1610 - P1615 NATS
• P2122 P2123 P2127 P2128 P2138 Accelerator pedal position sensor

2

• P0031 P0032 P0051 P0052 A/F sensor 1 heater
• P0037 P0038 P0057 P0058 Heated oxygen sensor 2 heater
• P0075 P0081 Intake valve timing control solenoid valve
• P0130 P0131 P0132 P0133 P0150 P0151 P0152 P0153 P2A00 P2A03 A/F sensor 1
• P0137 P0138 P0139 P0157 P0158 P0159 Heated oxygen sensor 2
• P0441 EVAP control system purge flow monitoring
• P0443 P0444 P0445 EVAP canister purge volume control solenoid valve
• P0447 P0448 EVAP canister vent control valve
• P0451 P0452 P0453 EVAP control system pressure sensor
• P0550 Power steering pressure sensor
• P0603 ECM power supply
• P0710 P0717 P0720 P0731 P0732 P0733 P0734 P0735 P0740 P0744 P0745 P1730 P1752 P1757 P1762 P1764

P1769 P1767 P1772 P1774 A/T related sensors, solenoid valves and switches

• P1140 P1145 Intake valve timing control position sensor
• P1217 Engine over temperature (OVERHEAT)
• P1805 Brake switch
• P2100 P2103 P2118 Electric throttle control actuator
• P2101 Electric throttle control function

3

• P0011 P0021 Intake valve timing control
• P0171 P0172 P0174 P0175 Fuel injection system function
• P0300 - P0308 Misfire
• P0420 P0430 Three way catalyst function
• P0442 EVAP control system (SMALL LEAK)
• P0455 EVAP control system (GROSS LEAK)
• P0456 EVAP control system (VERY SMALL LEAK)
• P0506 P0507 Idle speed control system
• P050E Cold start control
• P1148 P1168 Closed loop control
• P1211 TCS control unit
• P1212 TCS communication line
• P1564 ASCD steering switch
• P1572 ASCD brake switch
• P2119 Electric throttle control actuator

August 2012

2012 Pathfinder

EC-556

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

×

:Applicable —: Not applicable

Items

(CONSULT screen terms)

DTC*

1

SRT code

Trip

MIL

Perma-

nent DTC

group*

8

Reference

page

CONSULT

GST*

2

ECM*

3

LOST COMM (TCM)

U0101

0101*

5

—

1

×

B

CAN COMM CIRCUIT

U1001

1001*

5

—

2

—

—

NO DTC IS DETECTED.
FURTHER TESTING
MAY BE REQUIRED.

P0000

0000

—

—

Blinking

*

7

—

—

INT/V TIM CONT-B1

P0011

0011

—

2

×

B

INT/V TIM CONT-B2

P0021

0021

—

2

×

B

A/F SEN1 HTR (B1)

P0031

0031

—

2

×

B

A/F SEN1 HTR (B1)

P0032

0032

—

2

×

B

HO2S2 HTR (B1)

P0037

0037

—

2

×

B

HO2S2 HTR (B1)

P0038

0038

—

2

×

B

A/F SEN1 HTR (B2)

P0051

0051

—

2

×

B

A/F SEN1 HTR (B2)

P0052

0052

—

2

×

B

HO2S2 HTR (B2)

P0057

0057

—

2

×

B

HO2S2 HTR (B2)

P0058

0058

—

2

×

B

INT/V TIM V/CIR-B1

P0075

0075

—

2

×

B

INT/V TIM V/CIR-B2

P0081

0081

—

2

×

B

MAF SEN/CIRCUIT-B1

P0101

0101

—

2

×

B

MAF SEN/CIRCUIT-B1

P0102

0102

—

1

×

B

MAF SEN/CIRCUIT-B1

P0103

0103

—

1

×

B

IAT SENSOR 1 B1

P0111

0111

—

2

×

A

IAT SEN/CIRCUIT-B1

P0112

0112

—

2

×

B

IAT SEN/CIRCUIT-B1

P0113

0113

—

2

×

B

ECT SEN/CIRC

P0116

0116

—

2

×

A

ECT SEN/CIRC

P0117

0117

—

1

×

B

ECT SEN/CIRC

P0118

0118

—

1

×

B

TP SEN 2/CIRC-B1

P0122

0122

—

1

×

B

TP SEN 2/CIRC-B1

P0123

0123

—

1

×

B

ECT SENSOR

P0125

0125

—

2

×

B

IAT SENSOR-B1

P0127

0127

—

2

×

B

THERMSTAT FNCTN

P0128

0128

—

2

×

B

A/F SENSOR1 (B1)

P0130

0130

—

2

×

A

A/F SENSOR1 (B1)

P0131

0131

—

2

×

B

A/F SENSOR1 (B1)

P0132

0132

—

2

×

B

A/F SENSOR1 (B1)

P0133

0133

×

2

×

A

HO2S2 (B1)

P0137

0137

×

2

×

A

HO2S2 (B1)

P0138

0138

×

2

×

A

HO2S2 (B1)

P0139

0139

×

2

×

A

A/F SENSOR1 (B2)

P0150

0150

—

2

×

A

A/F SENSOR1 (B2)

P0151

0151

—

2

×

B

A/F SENSOR1 (B2)

P0152

0152

—

2

×

B

A/F SENSOR1 (B2)

P0153

0153

×

2

×

A

August 2012

2012 Pathfinder

ECM

EC-557

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

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EC

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HO2S2 (B2)

P0157

0157

×

2

×

A

HO2S2 (B2)

P0158

0158

×

2

×

A

HO2S2 (B2)

P0159

0159

×

2

×

A

FUEL SYS-LEAN-B1

P0171

0171

—

2

×

B

FUEL SYS-RICH-B1

P0172

0172

—

2

×

B

FUEL SYS-LEAN-B2

P0174

0174

—

2

×

B

FUEL SYS-RICH-B2

P0175

0175

—

2

×

B

FTT SENSOR

P0181

0181

—

2

×

A and B

FTT SEN/CIRCUIT

P0182

0182

—

2

×

B

FTT SEN/CIRCUIT

P0183

0183

—

2

×

B

TP SEN 1/CIRC-B1

P0222

0222

—

1

×

B

TP SEN 1/CIRC-B1

P0223

0223

—

1

×

B

MULTI CYL MISFIRE

P0300

0300

—

1 or 2

×

B

CYL 1 MISFIRE

P0301

0301

—

1 or 2

×

B

CYL 2 MISFIRE

P0302

0302

—

1 or 2

×

B

CYL 3 MISFIRE

P0303

0303

—

1 or 2

×

B

CYL 4 MISFIRE

P0304

0304

—

1 or 2

×

B

CYL 5 MISFIRE

P0305

0305

—

1 or 2

×

B

CYL 6 MISFIRE

P0306

0306

—

1 or 2

×

B

CYL 7 MISFIRE

P0307

0307

—

1 or 2

×

B

CYL 8 MISFIRE

P0308

0308

—

1 or 2

×

B

KNOCK SEN/CIRC-B1

P0327

0327

—

2

—

—

KNOCK SEN/CIRC-B1

P0328

0328

—

2

—

—

KNOCK SEN/CIRC-B2

P0332

0332

—

2

—

—

KNOCK SEN/CIRC-B2

P0333

0333

—

2

—

—

CKP SEN/CIRCUIT

P0335

0335

—

2

×

B

CMP SEN/CIRC-B1

P0340

0340

—

2

×

B

TW CATALYST SYS-B1

P0420

0420

×

2

×

A

TW CATALYST SYS-B2

P0430

0430

×

2

×

A

EVAP PURG FLOW/MON

P0441

0441

×

2

×

A

EVAP SMALL LEAK

P0442

0442

×

2

×

A

PURG VOLUME CONT/V

P0443

0443

—

2

×

B

PURG VOLUME CONT/V

P0444

0444

—

2

×

B

PURG VOLUME CONT/V

P0445

0445

—

2

×

B

VENT CONTROL VALVE

P0447

0447

—

2

×

B

VENT CONTROL VALVE

P0448

0448

—

2

×

A

EVAP SYS PRES SEN

P0451

0451

—

2

×

B

EVAP SYS PRES SEN

P0452

0452

—

2

×

B

EVAP SYS PRES SEN

P0453

0453

—

2

×

B

EVAP GROSS LEAK

P0455

0455

—

2

×

A

EVAP VERY SML LEAK

P0456

0456

×

*

4

2

×

A

FUEL LEV SEN SLOSH

P0460

0460

—

2

×

A

Items

(CONSULT screen terms)

DTC*

1

SRT code

Trip

MIL

Perma-

nent DTC

group*

8

Reference

page

CONSULT

GST*

2

ECM*

3

August 2012

2012 Pathfinder

EC-558

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

FUEL LEVEL SENSOR

P0461

0461

—

2

×

B

FUEL LEVL SEN/CIRC

P0462

0462

—

2

×

B

FUEL LEVL SEN/CIRC

P0463

0463

—

2

×

B

VEH SPEED SEN/CIRC*

6

P0500

0500

—

2

×

B

ISC SYSTEM

P0506

0506

—

2

×

B

ISC SYSTEM

P0507

0507

—

2

×

B

COLD START CONTROL

P050E

050E

—

2

×

A

PW ST P SEN/CIRC

P0550

0550

—

2

—

—

ECM BACK UP/CIRC

P0603

0603

—

2

×

B

ECM

P0605

0605

—

1 or 2

×

or —

B

ECM

P0607

0607

—

1

×

B

SENSOR POWER/CIRC

P0643

0643

—

1

×

B

TRANSMISSION CONT

P0700

0700

—

1

×

B

T/M RANGE SENSOR A

P0705

0705

—

2

×

B

ATF TEMP SEN/CIRC*

9

P0710

0710

—

2

×

B

INPUT SPEED SENSOR A

P0717

0717

—

2

×

B

OUTPUT SPEED SENSOR*

6

P0720

0720

—

2

×

B

1GR INCORRECT RATIO*

8

P0731

0731

—

2

×

B

2GR INCORRECT RATIO*

8

P0732

0732

—

2

×

B

3GR INCORRECT RATIO*

8

P0733

0733

—

2

×

B

4GR INCORRECT RATIO*

8

P0734

0734

—

2

×

B

5GR INCORRECT RATIO*

8

P0735

0735

—

2

×

B

TORQUE CONVERTER

P0740

0740

—

2

×

B

TORQUE CONVERTER

P0744

0744

—

2

×

B

PC SOLENOID A

P0745

0745

—

2

×

B

P-N POS SW/CIRCUIT

P0850

0850

—

2

×

B

INTK TIM S/CIRC-B1

P1140

1140

—

2

×

B

INTK TIM S/CIRC-B2

P1145

1145

—

2

×

B

CLOSED LOOP-B1

P1148

1148

—

1

×

A

CLOSED LOOP-B2

P1168

1168

—

1

×

A

TCS C/U FUNCTN

P1211

1211

—

2

—

—

TCS/CIRC

P1212

1212

—

2

—

—

ENG OVER TEMP

P1217

1217

—

1

×

B

CTP LEARNING-B1

P1225

1225

—

2

—

—

CTP LEARNING-B1

P1226

1226

—

2

—

—

BAT CURRENT SENSOR

P1550

1550

—

2

—

—

BAT CURRENT SENSOR

P1551

1551

—

2

—

—

BAT CURRENT SENSOR

P1552

1552

—

2

—

—

BAT CURRENT SENSOR

P1553

1553

—

2

—

—

BAT CURRENT SENSOR

P1554

1554

—

2

—

—

ASCD SW

P1564

1564

—

1

—

—

Items

(CONSULT screen terms)

DTC*

1

SRT code

Trip

MIL

Perma-

nent DTC

group*

8

Reference

page

CONSULT

GST*

2

ECM*

3

August 2012

2012 Pathfinder

ECM

EC-559

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

C

D

E

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EC

N

P

O

*1: 1st trip DTC No. is the same as DTC No.
*2: This number is prescribed by SAE J2012/ISO 15031-6.
*3: In Diagnostic Test Mode II (Self-diagnostic results), this number is controlled by NISSAN.
*4: SRT code will not be set if the self-diagnostic result is NG.
*5: The troubleshooting for this DTC needs CONSULT.
*6: When the fail-safe operations for both self-diagnoses occur, the MIL illuminates.
*7: When the ECM is in the mode that displays SRT status, MIL may blink. For the details, refer to “How to Display SRT Status”.
*8: When erasing this DTC, always use CONSULT or GST.

Test Value and Test Limit

INFOID:0000000007800450

The following is the information specified in Service $06 of SAE J1979/ISO 15031-5.

The test value is a parameter used to determine whether a system/circuit diagnostic test is OK or NG while

being monitored by the ECM during self-diagnosis. The test limit is a reference value which is specified as the

maximum or minimum value and is compared with the test value being monitored.

ASCD BRAKE SW

P1572

1572

—

1

—

—

LOCK MODE

P1610

1610

—

2

—

—

or

ID DISCORD, IMMU-ECM

P1611

1611

—

2

—

—

or

CHAIN OF ECM-IMMU

P1612

1612

—

2

—

—

or

CHAIN OF IMMU-KEY

P1614

1614

—

2

—

—

or

DIFFERENCE OF KEY

P1615

1615

—

2

—

—

or

INTERLOCK

P1730

1730

—

1

×

B

INPUT CLUTCH SOL

P1752

1752

—

1

×

B

FR BRAKE SOLENOID

P1757

1757

—

1

×

B

DRCT CLUTCH SOL

P1762

1762

—

1

×

B

HLR CLUTCH SOLENOID

P1767

1767

—

1

×

B

L C BRAKE SOLENOID

P1772

1772

—

1

×

B

L C BRAKE SOLENOID

P1774

1774

—

1

×

B

BRAKE SW/CIRCUIT

P1805

1805

—

2

—

—

ETC MOT PWR-B1

P2100

2100

—

1

×

B

ETC FNCTN/CIRC-B1

P2101

2101

—

1

×

B

ETC MOT PWR

P2103

2103

—

1

×

B

ETC MOT-B1

P2118

2118

—

1

×

B

ETC ACTR-B1

P2119

2119

—

1

×

B

APP SEN 1/CIRC

P2122

2122

—

1

×

B

APP SEN 1/CIRC

P2123

2123

—

1

×

B

APP SEN 2/CIRC

P2127

2127

—

1

×

B

APP SEN 2/CIRC

P2128

2128

—

1

×

B

TP SENSOR-B1

P2135

2135

—

1

×

B

APP SENSOR

P2138

2138

—

1

×

B

A/F SENSOR1 (B1)

P2A00

2A00

—

2

×

A

A/F SENSOR1 (B2)

P2A03

2A03

—

2

×

A

Items

(CONSULT screen terms)

DTC*

1

SRT code

Trip

MIL

Perma-

nent DTC

group*

8

Reference

page

CONSULT

GST*

2

ECM*

3

August 2012

2012 Pathfinder

EC-560

< ECU DIAGNOSIS INFORMATION >

[VK56DE]

ECM

These data (test value and test limit) are specified by On Board Monitor ID (OBDMID), Test ID (TID), Unit and

Scaling ID and can be displayed on the GST screen.

The items of the test value and test limit will be displayed with GST screen which items are provided by the

ECM. (e.g., if bank 2 is not applied on this vehicle, only the items of bank 1 are displayed)

August 2012

2012 Pathfinder

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