Nissan Pathfinder (2012 year). Instruction — part 241
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P0037, P0038, P0057, P0058 HO2S2 HEAT-
ER . . . . . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0075, P0081 IVT CONTROL SOLENOID
VALVE . . . . . . . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0101 MAF SENSOR . . . . . . . . . ...
Component Description . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0102, P0103 MAF SENSOR . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0111 IAT SENSOR . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0112, P0113 IAT SENSOR . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0116 ECT SENSOR . . . . . . . . . ...
Component Description . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0117, P0118 ECT SENSOR . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0122, P0123 TP SENSOR . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0125 ECT SENSOR . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0127 IAT SENSOR . . . . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0128 THERMOSTAT FUNCTION . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0130, P0150 A/F SENSOR 1 . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0131, P0151 A/F SENSOR 1 . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0132, P0152 A/F SENSOR 1 . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0133, P0153 A/F SENSOR 1 . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0137, P0157 HO2S2 . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0138, P0158 HO2S2 . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
August 2012
2012 Pathfinder
EC-10
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0139, P0159 HO2S2 . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0171, P0174 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0172, P0175 FUEL INJECTION SYSTEM
FUNCTION . . . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0181 FTT SENSOR . . . . . . . . . ...
Component Description . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0182, P0183 FTT SENSOR . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0222, P0223 TP SENSOR . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0300, P0301, P0302, P0303, P0304, P0305,
P0306, P0307, P0308 MISFIRE . . . . . ...
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0327, P0328, P0332, P0333 KS . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0335 CKP SENSOR (POS) . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0340 CMP SENSOR (PHASE) . . . . . ...
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0420, P0430 THREE WAY CATALYST
FUNCTION . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0441 EVAP CONTROL SYSTEM . . . . ..
System Description . . . . . . . . . . . ...
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0442 EVAP CONTROL SYSTEM . . . . ..
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0443 EVAP CANISTER PURGE VOLUME
CONTROL SOLENOID VALVE . . . . . .
Description . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0444, P0445 EVAP CANISTER PURGE
VOLUME CONTROL SOLENOID VALVE . ...
Description . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0447 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . ..
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0448 EVAP CANISTER VENT CONTROL
VALVE . . . . . . . . . . . . . . . ..
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
August 2012
2012 Pathfinder
EC-11
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Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0451 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0452 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0453 EVAP CONTROL SYSTEM PRES-
SURE SENSOR . . . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0455 EVAP CONTROL SYSTEM . . . . ..
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0456 EVAP CONTROL SYSTEM . . . . ..
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P0460 FUEL LEVEL SENSOR . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0461 FUEL LEVEL SENSOR . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0462, P0463 FUEL LEVEL SENSOR . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0500 VSS . . . . . . . . . . . . . ...
Description . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0506 ISC SYSTEM . . . . . . . . . .
Description . . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0507 ISC SYSTEM . . . . . . . . . .
Description . . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P050E COLD START CONTROL . . . . ...
Description . . . . . . . . . . . . . . . .
DTC Logic . . . . . . . . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
P0550 PSP SENSOR . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P0603 ECM POWER SUPPLY . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0605 ECM . . . . . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0607 ECM . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0643 SENSOR POWER SUPPLY . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P0850 PNP SWITCH . . . . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P1140, P1145 IVT CONTROL POSITION
SENSOR . . . . . . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
August 2012
2012 Pathfinder
EC-12
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P1148, P1168 CLOSED LOOP CONTROL . .
On Board Diagnosis Logic . . . . . . . . . .
P1211 TCS CONTROL UNIT . . . . . . ...
Description . . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P1212 TCS COMMUNICATION LINE . . . .
Description . . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P1217 ENGINE OVER TEMPERATURE . . .
On Board Diagnosis Logic . . . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Main 12 Causes of Overheating . . . . . . .
P1225 TP SENSOR . . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P1226 TP SENSOR . . . . . . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P1550 BATTERY CURRENT SENSOR . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P1551, P1552 BATTERY CURRENT SEN-
SOR . . . . . . . . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P1553 BATTERY CURRENT SENSOR . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
P1554 BATTERY CURRENT SENSOR . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . . .
Overall Function Check . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P1564 ASCD STEERING SWITCH . . . . ..
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P1572 ASCD BRAKE SWITCH . . . . . .
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P1805 BRAKE SWITCH . . . . . . . . ...
Description . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P2100, P2103 THROTTLE CONTROL MO-
TOR RELAY . . . . . . . . . . . . . .
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P2101 ELECTRIC THROTTLE CONTROL
FUNCTION . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P2118 THROTTLE CONTROL MOTOR . . ..
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P2119 ELECTRIC THROTTLE CONTROL
ACTUATOR . . . . . . . . . . . . . ..
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
P2122, P2123 APP SENSOR . . . . . . ...
Component Description . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
August 2012
2012 Pathfinder
EC-13
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P2127, P2128 APP SENSOR . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P2135 TP SENSOR . . . . . . . . . . ..
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P2138 APP SENSOR . . . . . . . . . ...
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
P2A00, P2A03 A/F SENSOR 1 . . . . . .
Component Description . . . . . . . . . . .
On Board Diagnosis Logic . . . . . . . . .
DTC Confirmation Procedure . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
ASCD BRAKE SWITCH . . . . . . . . ...
Component Description . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
ASCD INDICATOR . . . . . . . . . . ...
Component Description . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
COOLING FAN . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
ELECTRICAL LOAD SIGNAL . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
FUEL INJECTOR . . . . . . . . . . . .
Component Description . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
FUEL PUMP . . . . . . . . . . . . . .
Description . . . . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ..
IGNITION SIGNAL . . . . . . . . . . ...
Component Description . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
MALFUNCTION INDICATOR LAMP . . . ..
Component Function Check . . . . . . . . ..
Diagnosis Procedure . . . . . . . . . . . .
ON BOARD REFUELING VAPOR RECOV-
ERY (ORVR) . . . . . . . . . . . . .
System Description . . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
POSITIVE CRANKCASE VENTILATION . ...
Description . . . . . . . . . . . . . . . .
Component Inspection . . . . . . . . . . ...
REFRIGERANT PRESSURE SENSOR . . ..
Component Description . . . . . . . . . . .
Diagnosis Procedure . . . . . . . . . . . .
SYMPTOM DIAGNOSIS . . . . . . .
ENGINE CONTROL SYSTEM SYMPTOMS ...
Symptom Matrix Chart . . . . . . . . . . ...
NORMAL OPERATING CONDITION . . . .
Fuel Cut Control (at No Load and High Engine
Speed) . . . . . . . . . . . . . . . . ...
PERIODIC MAINTENANCE . . . . . ..
FUEL PRESSURE . . . . . . . . . . ...
Fuel Pressure Check . . . . . . . . . . . .
EVAP LEAK CHECK . . . . . . . . . ..
How to Detect EVAP Leakage . . . . . . . ...
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . ..
SERVICE DATA AND SPECIFICATIONS
(SDS) . . . . . . . . . . . . . . . ...
Fuel Pressure . . . . . . . . . . . . . .
Idle Speed and Ignition Timing . . . . . . . ..
Calculated Load Value . . . . . . . . . . ..
Mass Air Flow Sensor . . . . . . . . . . .
Intake Air Temperature Sensor . . . . . . . .
Engine Coolant Temperature Sensor . . . . .
A/F Sensor 1 Heater . . . . . . . . . . . ..
Heated Oxygen sensor 2 Heater . . . . . . ...
Crankshaft Position Sensor (POS) . . . . . .
Camshaft Position Sensor (PHASE) . . . . . .
Throttle Control Motor . . . . . . . . . . .
Fuel Injector . . . . . . . . . . . . . . ...
Fuel Pump . . . . . . . . . . . . . . . .
August 2012
2012 Pathfinder
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< BASIC INSPECTION >
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DIAGNOSIS AND REPAIR WORKFLOW
BASIC INSPECTION
DIAGNOSIS AND REPAIR WORKFLOW
Trouble Diagnosis Introduction
INFOID:0000000007357942
INTRODUCTION
The engine has an ECM to control major systems such as fuel con-
trol, ignition control, idle air control system, etc. The ECM accepts
input signals from sensors and instantly drives actuators. It is essen-
tial that both input and output signals are proper and stable. At the
same time, it is important that there are no malfunctions such as vac-
uum leaks, fouled spark plugs, or other malfunctions with the engine.
It is much more difficult to diagnose an incident that occurs intermit-
tently rather than continuously. Most intermittent incidents are
caused by poor electric connections or improper wiring. In this case,
careful checking of suspected circuits may help prevent the replace-
ment of good parts.
A visual check only may not find the cause of the incidents. A road
test with CONSULT (or GST) or a circuit tester connected should be
performed. Follow the Work Flow on "Work Flow".
Before undertaking actual checks, take a few minutes to talk with a
customer who approaches with a driveability complaint. The cus-
tomer can supply good information about such incidents, especially
intermittent ones. Find out what symptoms are present and under
what conditions they occur. A Diagnostic Worksheet like the example
on "Worksheet Sample" should be used.
Start your diagnosis by looking for conventional malfunctions first.
This will help troubleshoot driveability malfunctions on an electroni-
cally controlled engine vehicle.
WORK FLOW
Overall Sequence
MEF036D
SEF233G
SEF234G
August 2012
2012 Pathfinder
DIAGNOSIS AND REPAIR WORKFLOW
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< BASIC INSPECTION >
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C
D
E
F
G
H
I
J
K
L
M
A
EC
N
P
O
Detailed Flow
1.
GET INFORMATION FOR SYMPTOM
*1: Include 1st trip DTC.
*2: Include 1st trip freeze frame data.
JSBIA0123GB
August 2012
2012 Pathfinder
EC-16
< BASIC INSPECTION >
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DIAGNOSIS AND REPAIR WORKFLOW
1. Get the detailed information from the customer about the symptom (the condition and the environment
when the incident/malfunction occurred) using the “Diagnostic Work Sheet”.
2. Ask if the customer requests I/M examination.
Malfunction information, obtained>>GO TO 2.
No malfunction information, but a request for I/M examination>>GO TO 13.
2.
CHECK DTC
1. Check DTC.
2. Perform the following procedure if DTC is displayed.
-
Record DTC and freeze frame data. (Print them out with CONSULT or GST.)
-
Erase DTC. Refer to
EC-74, "On Board Diagnosis Function"
(With CONSULT).
-
Study the relationship between the cause detected by DTC and the symptom described by the customer.
(Symptom Table is useful. Refer to
EC-475, "Symptom Matrix Chart"
3. Check related service bulletins for information.
Are any symptoms described and any DTCs detected?
Symptom is described, DTC is detected>>GO TO 3.
Symptom is described, DTC is not detected>>GO TO 4.
Symptom is not described, DTC is detected>>GO TO 5.
3.
CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer (except MIL ON).
Also study the normal operation and fail-safe related to the symptom.
Diagnosis Work Sheet is useful to verify the incident.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 5.
4.
CONFIRM THE SYMPTOM
Try to confirm the symptom described by the customer.
Also study the normal operation and fail-safe related to the symptom.
Diagnosis Work Sheet is useful to verify the incident.
Verify relation between the symptom and the condition when the symptom is detected.
>> GO TO 6.
5.
PERFORM DTC CONFIRMATION PROCEDURE
Perform DTC CONFIRMATION PROCEDURE for the displayed DTC, and then make sure that DTC is
detected again.
If two or more DTCs are detected, refer to
EC-443, "DTC Inspection Priority Chart"
and determine trouble
diagnosis order.
NOTE:
• Freeze frame data is useful if the DTC is not detected.
• Perform Component Function Check if DTC CONFIRMATION PROCEDURE is not included on Service
Manual. This simplified check procedure is an effective alternative though DTC cannot be detected during
this check.
If the result of Component Function Check is NG, it is the same as the detection of DTC by DTC CONFIR-
MATION PROCEDURE.
Is DTC detected?
YES
>> GO TO 10.
NO
>> Check according to
.
6.
PERFORM BASIC INSPECTION
Perform
.
Do you have CONSULT?
YES
>> GO TO 7.
NO
>> GO TO 9.
August 2012
2012 Pathfinder
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