Nissan Pathfinder (2012 year). Instruction — part 309
ECM
EC-553
< ECU DIAGNOSIS INFORMATION >
[VK56DE]
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EC
N
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: 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
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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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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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
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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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