Lexus NX: Sfi System
- Precaution
- Definition Of Terms
- Parts Location
- System Diagram
- How To Proceed With Troubleshooting
- Check For Intermittent Problems
- Basic Inspection
- Registration
- Initialization
- Checking Monitor Status
- Readiness Monitor Drive Pattern
- Problem Symptoms Table
- Terminals Of Ecm
- Diagnosis System
- Dtc Check / Clear
- Freeze Frame Data
- Check Mode Procedure
- Fail-safe Chart
- Data List / Active Test
- Diagnostic Trouble Code Chart
- Vehicle Control History
- Camshaft Position "A" Actuator Circuit (Bank 1) (P0010)
- Camshaft Position "A" - Timing Over-Advanced or System Performance (Bank 1) (P0011,P0012)
- Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) (P0016)
- Oxygen (A/F) Sensor Heater Control Circuit Low (Bank 1 Sensor 1) (P0031,P0032,P101D)
- Oxygen Sensor Heater Control Circuit Low (Bank 1 Sensor 2) (P0037,P0038,P0141,P102D)
- EVAP System Tank Vapor Line Restricted/Blocked (P00FE)
- Mass Air Flow Circuit Range / Performance Problem (P0101)
- Mass Air Flow Circuit Low (P0102,P0103)
- Manifold Absolute Pressure Circuit Problem (P0106)
- Manifold Absolute Pressure / Barometric Pressure Circuit Low Input (P0107,P0108)
- Intake Air Temperature Sensor 1 Circuit Range / Performance (P0111)
- Intake Air Temperature Circuit Low Input (P0112,P0113)
- Engine Coolant Temperature Circuit (P0115,P0117,P0118)
- Engine Coolant Temperature Circuit Range / Performance (P0116)
- Engine Coolant Temperature / Intake Air Temperature Correlation (P011B)
- Throttle Pedal Position Sensor / Switch "A" Circuit (P0120-P0123,P0220,P0222,P0223,P2135)
- Insufficient Coolant Temperature for Closed Loop Fuel Control (P0125)
- Thermostat (P0128)
- Oxygen Sensor Circuit (Bank 1 Sensor 2) (P0136-P0139,P013A)
- A/F Sensor Slow Response - Rich to Lean Bank 1 Sensor 1 (P014C,P014D,P015A,P015B)
- System Too Lean (Bank 1) (P0171,P0172)
- Random / Multiple Cylinder Misfire Detected (P0300-P0304)
- Knock Sensor 1 Circuit Low Input (Bank 1 or Single Sensor) (P0327,P0328)
- Crankshaft Position Sensor "A" Circuit (P0335)
- Camshaft Position Sensor Circuit (P0340,P0342,P0343)
- Ignition Coil "A" Primary / Secondary Circuit (P0351-P0354)
- Exhaust Gas Recirculation Flow Insufficient Detected (P0401)
- Exhaust Gas Recirculation Control Circuit (P0403)
- Catalyst System Efficiency Below Threshold (Bank 1) (P0420)
- Evaporative Emission System Leak Detection Reference Orifice Low Flow (P043E,P043F,P2401,P2402,P2419)
- Evaporative Emission Control System Incorrect Purge Flow (P0441)
- Evaporative Emission Control System Pressure Sensor Range / Performance (P0451-P0453)
- Evaporative Emission Control System Leak Detected (Gross Leak) (P0455,P0456)
- Fuel Level Sensor "A" Circuit Range / Performance (P0461)
- Fuel Level Sensor "A" Circuit Low (P0462,P0463)
- Idle Control System (P0505)
- Cold Start Idle Air Control System Performance (P050A)
- Cold Start Ignition Timing Performance (P050B)
- System Voltage (P0560)
- Random Access Memory (RAM) (P0604)
- ECM / PCM Processor (P0606)
- Control Module Performance (P0607)
- Internal Control Module Monitoring Processor Performance (P060A)
- Internal Control Module A/D Processing Performance (P060B)
- Internal Control Module Throttle Position Performance (P060E)
- Internal Control Module EEPROM Error (P062F)
- VIN not Programmed or Mismatch - ECM / PCM (P0630)
- Actuator Supply Voltage Circuit / Open (P0657)
- Evaporative Emission System Pressure Sensor - Manifold Absolute Pressure Correlation (P106A)
- Startability Malfunction (P1604)
- Rough Idling (P1605)
- Throttle Actuator Control Motor Circuit Low (P2102,P2103)
- Throttle / Pedal Position Sensor "A" Minimum Stop Performance (P2109)
- Throttle Actuator Control System - Stuck Open (P2111,P2112)
- Throttle Actuator Control Motor Current Range / Performance (P2118)
- Throttle Actuator Control Throttle Body Range / Performance (P2119)
- Oxygen (A/F) Sensor Signal Stuck Lean (Bank 1 Sensor 1) (P2195,P2196)
- Bank 1 Air-Fuel Ratio Imbalance (P219A,P219C-P219F)
- Oxygen (A/F) Sensor Pumping Current Circuit / Open (for A/F sensor) (Bank 1 Sensor 1) (P2237-P2239,P2252,P2253)
- Evaporative Emission Pressure Switching Valve Stuck OFF (P2420)
- ECM / PCM Internal Engine Off Timer Performance (P2610)
- Poor Engine Power (P3190,P3191)
- Fuel Run Out (P3193)
- Lost Communication with Instrument Panel Cluster Control Module (Combination Meter) (U0155)
- Lost Communication with Hybrid Vehicle Control System (U0293)
- EVAP System
- ECM Power Source Circuit
- VC Output Circuit
- Fuel Pump Control Circuit
- Fuel Injector Circuit
- MIL Circuit
- Rough Idling
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Precaution
PRECAUTION INITIALIZATION NOTICE: Perform Registration (VIN registration) when replacing the ECM. Click here DISCONNECT CABLE FROM NEGATIVE AUXILIARY BATTERY TERMINAL NOTICE:
After the power swit
Definition Of Terms
DEFINITION OF TERMS Term Definition Monitor Description Description of what the ECM monitors and how it detects malfunctions (monitoring purpose and details). Related DTCs Group of di
Parts Location
PARTS LOCATION ILLUSTRATION *1 CANISTER *2 FUEL PUMP *3 MASS AIR FLOW METER SUB-ASSEMBLY *4 PURGE VSV *5 NO. 1 ENGINE ROOM RELAY BLOCK AND JUNCTION BLOCK ASSEMBLY *6 EFI-
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ECM Power Source Circuit
DESCRIPTION When the power switch is turned on (IG), auxiliary battery voltage is applied to the IGSW terminal of the ECM. The output signal from the MREL terminal of the ECM causes current to flow to the coil of the EFI-MAIN relay, closing the contacts of the EFI-MAIN relay and supplying power to t
Data List / Active Test
DATA LIST / ACTIVE TEST DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be dis
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