NO.2 MIL ILLUMINATES [LF, L3]
| 2 | MIL ILLUMINATES |
|---|
| DESCRIPTION | The MIL is illuminated incorrectly. |
| POSSIBLE CAUSE | The PCM illuminates for emission-related concern (DTC is stored in PCM) Instrument cluster malfunction NOTE: If the MIL blinks at steady rate, misfire condition could possibly exist. |
| NOTE |
|---|
| If the MIL blinks at steady rate, misfire condition could possibly exist. |
DESCRIPTION AND POSSIBLE CAUSE
NO.3 WILL NOT CRANK [LF, L3]
| 3 | WILL NOT CRANK |
|---|
| DESCRIPTION | The starter does not work. |
| POSSIBLE CAUSE | Open starter circuit between ignition switch and starter TR switch malfunction (ATX) TR switch misadjustment (ATX) Low or dead battery Charging system malfunction. Starter interlock switch malfunction (MTX) Starter malfunction Seized/hydrolocked engine, flywheel (MTX) or drive plate (ATX) Immobilizer system and/or circuit malfunction (if equipped) Immobilizer system operating properly. (Ignition key is not registered) (if equipped) |
DESCRIPTION AND POSSIBLE CAUSE
NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [LF, L3]
| 4 | HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK |
|---|
| DESCRIPTION | The starter cranks engine at normal speed but engine requires excessive cranking time before starting. The battery is in normal condition. |
| POSSIBLE CAUSE | Erratic signal to ignition coil Vacuum leakage Poor fuel quality Starting system malfunction Spark plug malfunction Air leakage from intake-air system Erratic signal from CKP sensor Erratic signal from CMP sensor Improper air/fuel mixture ratio control Air cleaner restriction Improper operation of electronic throttle control system PCV valve malfunction Inadequate fuel pressure Purge solenoid valve malfunction MAF sensor contamination Incorrect MAF sensor GND voltage Restriction in exhaust system EGR valve malfunction Pressure regulator malfunction (built-in fuel pump unit) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.5 ENGINE STALLS-AFTER START/AT IDLE [LF, L3]
| 5 | ENGINE STALLS-AFTER START/AT IDLE |
|---|
| DESCRIPTION | Engine stops unexpectedly. |
| POSSIBLE CAUSE | A/C system operation is improper Air leakage from intake-air system parts Purge solenoid valve malfunction Improper operation of electronic throttle control system EGR valve malfunction No signal from CKP sensor due to sensor, related wire or wrong installation Vacuum leakage Engine overheating Low engine compression Erratic signal to ignition coil Poor fuel quality PCV valve malfunction Air cleaner restriction Restriction in exhaust system Electrical connector disconnection Open or short circuit in fuel pump body and related wiring harness No battery power supply to PCM or poor GND Inadequate fuel pressure Fuel pump body mechanical malfunction Fuel leakage from fuel injector Fuel injector clogging Ignition coil malfunction Improper air/fuel mixture ratio control Improper valve timing Improper operation variable valve timing control system Immobilizer system and/or circuit malfunction Immobilizer system operating property. (Ignition key is not registered.) Pressure regulator malfunction (built-in fuel pump unit) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.6 CRANKS NORMALLY BUT WILL NOT START [LF, L3]
| 6 | CRANKS NORMALLY BUT WILL NOT START |
|---|
| DESCRIPTION | The starter cranks engine at normal speed but the engine will not run. Refer to symptom troubleshooting " NO.5 ENGINE STALLS " if this symptom appears after engine stall. Fuel is in tank. Battery is in normal condition. |
| POSSIBLE CAUSE | No battery power supply to PCM Air leakage from intake-air system Open PCM GND or vehicle body GND Improper operation of electronic throttle control system EGR valve malfunction No signal from CKP sensor due to sensor, related wire or incorrect installation No signal from CMP sensor due to sensor, related wire or incorrect installation Low engine compression Engine overheating Vacuum leakage Erratic signal to ignition coil Improper air/fuel mixture ratio control Poor fuel quality PCV valve malfunction Restriction in intake-air system Restriction in exhaust system Disconnected electrical connector Open or short circuit in fuel pump body and related wiring harness Inadequate fuel pressure Fuel pump mechanical malfunction Fuel leakage from injector Fuel injector is clogged. Purge solenoid valve malfunction Spark plug malfunction Ignition coil malfunction Improper variable valve timing control system operation Improper valve timing Immobilizer system and/or circuit malfunction (if equipped) Immobilizer system operating properly. (Ignition key is not registered.) (if equipped) Pressure regulator malfunction (built-in fuel pump unit) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.7 SLOW RETURN TO IDLE [LF, L3]
| 7 | SLOW RETURN TO IDLE |
|---|
| DESCRIPTION | Engine takes more time than normal to return to idle speed. |
| POSSIBLE CAUSE | ECT sensor malfunction Thermostat is stuck open. Throttle body malfunction Air leakage from intake-air system |
DESCRIPTION AND POSSIBLE CAUSE
NO.8 ENGINE RUNS ROUGH/ROLLING IDLE [LF, L3]
| 8 | ENGINE RUNS ROUGH/ROLLING IDLE |
|---|
| DESCRIPTION | Engine speed fluctuates between specified idle speed and lower speed and engine shakes excessively. Idle speed is too slow and engine shakes excessively. |
| POSSIBLE CAUSE | Air leakage from intake-air system parts A/C system operation is improper Erratic signal to ignition coil Spark plug malfunction Purge solenoid valve malfunction Improper operation of electronic throttle control system Idle learning of electronic throttle control system is not completed EGR valve malfunction Erratic or no signal from CMP sensor Low engine compression Improper valve timing Improper variable valve timing control system operation. Erratic signal from CKP sensor Improper air/fuel mixture ratio control operation (abnormal signal form MAF sensor or HO2S) Open or short circuit in PCM GND circuit Poor fuel quality PCV valve malfunction Air cleaner restriction Restriction in exhaust system Disconnected electrical connectors Inadequate fuel pressure Fuel pump body mechanical malfunction Improper load signal input Fuel line restriction or clogging Improper fuel injection control operation Fuel leakage from fuel injector Fuel injector clogging Engine overheating Vacuum leakage Pressure regulator malfunction (built-in fuel pump unit) WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious Injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that It is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious Injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that It is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.9 FAST IDLE/RUNS ON [LF, L3]
| 9 | FAST IDLE/RUNS ON |
|---|
| DESCRIPTION | The engine speed continues at fast idle after warm-up. The engine runs after the ignition switch is turned off. |
| POSSIBLE CAUSE | ECT sensor malfunction Air leakage from intake-air system Throttle body malfunction Accelerator pedal position sensor misadjustment Cruise control system operation improperly Improper load signal input Improper operation of electronic throttle control system |
DESCRIPTION AND POSSIBLE CAUSE
NO.10 LOW IDLE/STALLS DURING DECELERATION [LF, L3]
| 10 | LOW IDLE/STALLS DURING DECELERATION |
|---|
| DESCRIPTION | Engine stops unexpectedly at the beginning of deceleration or recovery from deceleration. |
| POSSIBLE CAUSE | Vacuum leakage Improper operation of electronic throttle control system Air leakage from intake-air system Improper air/fuel mixture ratio control Evaporative emission control system malfunction Accelerator pedal position sensor or related circuit malfunction Accelerator pedal position sensor misadjustment TP sensor or related circuit malfunction MAF sensor or related circuit malfunction Brake switch or related circuit malfunction Neutral/clutch pedal position switch or related circuit malfunction (MTX) TR switch or related circuit malfunction (ATX) Improper A/C magnetic clutch operation |
DESCRIPTION AND POSSIBLE CAUSE
NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [LF, L3]
| 11 | ENGINE STALLS/QUITS - ACCELERATION/CRUISE ENGINE RUNS ROUGH - ACCELERATION/CRUISE MISSES - ACCELERATION/CRUISE BUCK/JERK - ACCELERATION/CRUISE/DECELERATION HESITATION/STUMBLE - ACCELERATION SURGES - ACCELERATION/CRUISE |
|---|
| DESCRIPTION | Engine stops unexpectedly at the beginning of acceleration or during acceleration. Engine stops unexpectedly while cruising. Engine speed fluctuates during acceleration or cruising. Engine misses during acceleration or cruising. Vehicle bucks/jerks during acceleration, cruising, or deceleration. Momentary pause at beginning of acceleration or during acceleration Momentary minor irregularity in engine output |
| POSSIBLE CAUSE | Improper A/C system operation Erratic signal or no signal from CMP sensor Air leakage from intake-air system parts Purge solenoid valve malfunction Improper operation of electronic throttle control system EGR valve malfunction Erratic signal from CKP sensor Low engine compression Vacuum leakage Poor fuel quality Main relay intermittent malfunction Throttle body malfunction Engine overheating Spark plug malfunction Improper air/fuel mixture ratio control operation Improper variable tumble control operation Erratic signal to ignition coil Air cleaner restriction PCV valve malfunction Fuel flow into evaporative purge hose Improper valve timing due to jumping out timing chain Restriction in exhaust system Intermittent open or short circuit in fuel body pump circuit Inadequate fuel pressure Fuel pump mechanical malfunction Check valve (two-way) malfunction integrated with fuel tank Fuel leakage from fuel injector Fuel injector clogging Fuel line restriction or clogging Pressure regulator malfunction (built-in fuel pump unit) Erratic signal form Accelerator pedal position sensor Erratic signal form TP sensor Intermittent open or short circuit of MAF sensor, TP sensor, Accelerator pedal position sensor and VSS ATX malfunction (ATX) Clutch slippage (MTX) Improper variable intake-air control operation Loose attaching bolts or worn engine mounts WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [LF, L3]
| 12 | LACK/LOSS OF POWER - ACCELERATION/CRUISE |
|---|
| DESCRIPTION | Performance is poor under load (such as power down when climbing hills). |
| POSSIBLE CAUSE | Improper A/C system operation Erratic signal or no signal from CMP sensor Air leakage from intake-air system parts Restriction in intake-air system Intake air temperature too hot Improper variable intake-air control operation Improper variable tumble control operation Improper operation of electronic throttle control system Purge control solenoid malfunction Improper EGB valve operation Brake dragging Erratic signal from CKP sensor Low engine compression Vacuum leakage Poor fuel quality Erratic signal to ignition coil Engine overheating Throttle body malfunction Spark plug malfunction PCV valve malfunction Improper valve timing due to jumping out of timing chain Improper variable valve timing control operation Restriction in exhaust system Intermittent open or short in fuel pump related circuit Inadequate fuel pressure Fuel pump mechanical malfunction Fuel line restriction or clogging Fuel leakage from fuel injector Fuel injector clogging Erratic signal from accelerator pedal position sensor Erratic signal from TP sensor Intermittent open or short circuit in MAF sensor, Accelerator pedal position sensor, TP sensor, IAT sensor and VSS ATX malfunction (ATX) Clutch slippage (MTX) WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.13 KNOCKING/PINGING/DETONATION-ACCELERATION/CRUISE [LF, L3]
| 13 | KNOCKING/PINGING - ACCELERATION/CRUISE |
|---|
| DESCRIPTION | Sound is heard when air/fuel mixture is ignited by something other than spark plug (such as hot spot in combustion chamber). |
| POSSIBLE CAUSE | Engine overheating due to cooling system malfunction ECT sensor malfunction IAT sensor malfunction MAF sensor malfunction Knock sensor malfunction Erratic signal from CMP sensor Inadequate engine compression Inadequate fuel pressure WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.14 POOR FUEL ECONOMY [LF, L3]
| 14 | POOR FUEL ECONOMY |
|---|
| DESCRIPTION | Fuel economy is unsatisfactory. |
| POSSIBLE CAUSE | Contaminated air cleaner element Variable intake-air control malfunction Engine cooling system malfunction Improper ATF level (ATX) Weak spark Poor fuel quality Erratic or no signal from CMP sensor Clutch slippage (MTX) Variable tumble control malfunction Improper variable valve timing control system operation Improper coolant level Inadequate fuel pressure Spark plug malfunction PCV valve malfunction Brake dragging Improper valve timing due to jumping out of timing chain Contaminated MAF sensor Improper engine compression Exhaust system clogging WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.15 EMISSION COMPLIANCE [LF, L3]
| 15 | EMISSION COMPLIANCE |
|---|
| DESCRIPTION | Fails emissions test. |
| POSSIBLE CAUSE | Vacuum lines leakage or blockage Cooling system malfunction Spark plug malfunction Leakage from intake manifold Erratic or no signal from CMP sensor Inadequate fuel pressure PCV valve malfunction or incorrect valve installation EGR valve malfunction Exhaust system clogging Fuel tank ventilation system malfunction Fuel-filler cap malfunction Charcoal canister damage Air cleaner element clogging or restriction Throttle body malfunction Erratic signal to ignition coil Improper air/fuel mixture ratio control operation Bend or open circuit HO2S wiring harness Catalyst converter malfunction Engine internal parts malfunction Excessive carbon is built up in combustion chamber Improper engine compression Improper valve timing WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.16 HIGH OIL CONSUMPTION/LEAKAGE [LF, L3]
| 16 | HIGH OIL CONSUMPTION/LEAKAGE |
|---|
| DESCRIPTION | Oil consumption is excessive. |
| POSSIBLE CAUSE | PCV valve malfunction Improper dipstick Improper engine oil viscosity Engine internal parts malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [LF, L3]
| 17 | COOLING SYSTEM CONCERNS - OVERHEATING |
|---|
| DESCRIPTION | Engine runs at higher than normal temperature/overheats. |
| POSSIBLE CAUSE | Improper coolant level Blown fuses Coolant leakage Excessive A/C system pressure A/C system operation is improper Improper water/anti-freeze mixture Fans reverse rotation Poor radiator condition Thermostat malfunction Radiator hoses damage Improper or damaged radiator cap Cooling fan is inoperative. Coolant overflow system malfunction Improper tension of drive chain Drive belt damage |
DESCRIPTION AND POSSIBLE CAUSE
NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [LF, L3]
| 18 | COOLING SYSTEM CONCERNS-RUNS COLD |
|---|
| DESCRIPTION | Engine takes excessive time to reach normal operating temperature. |
| POSSIBLE CAUSE | Thermostat malfunction Cooling fan system malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.19 EXHAUST SMOKE [LF, L3]
| 19 | EXHAUST SMOKE |
|---|
| DESCRIPTION | Blue, black, or white smoke from exhaust system |
| POSSIBLE CAUSE | Blue smoke (Burning oil): PCV valve malfunction Engine Internal oil leakage White smoke (Water in combustion): Cooling system malfunction (coolant loss) Engine internal coolant leakage Black smoke (Rich fuel mixture): Air cleaner restriction Intake-air system is collapsed or restricted. Fuel return line is restricted. Excessive fuel pressure Improper engine compression Injector fuel leakage Ignition system malfunction WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.20 FUEL ODOR (IN ENGINE COMPARTMENT)[LF, L3]
| 20 | FUEL ODOR (IN ENGINE COMPARTMENT) |
|---|
| DESCRIPTION | Gasoline fuel smell or visible leakage |
| POSSIBLE CAUSE | Excessive fuel pressure Purge solenoid valve malfunction Fuel tank vent system blockage Charcoal canister malfunction Fuel leakage from fuel system WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.23 A/C DOES NOT WORK SUFFICIENTLY [LF, L3]
| 23 | A/C DOES NOT WORK SUFFICIENTLY. |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not engage when the A/C switch is turned on. |
| POSSIBLE CAUSE | Improper refrigerant charging amount Open the A/C magnetic clutch Open circuit in wiring harness between A/C relay and A/C magnetic clutch Poor GND of A/C magnetic clutch Refrigerant pressure switch is stuck open. A/C relay is stuck open. Seized A/C compressor Open circuit in wiring harness between A/C switch and PCM through both refrigerant pressure switch and A/C amplifier |
DESCRIPTION AND POSSIBLE CAUSE
NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [LF, L3]
| 24 | A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY. |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not disengage. |
| POSSIBLE CAUSE | A/C compressor magnetic clutch engagement is stuck. A/C relay is stuck closed. Short to GND in wiring harness between A/C switch and PCM Short to GND in wiring harness between A/C relay and PCM Short circuit to battery power in A/C relay to magnetic clutch |
DESCRIPTION AND POSSIBLE CAUSE
NO.25 A/C DOES NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [LF, L3]
| 25 | A/C IS NOT CUT Off UNDER WOT CONDITIONS. |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not disengage under WOT. |
| POSSIBLE CAUSE | Accelerator pedal position sensor malfunction Accelerator pedal position sensor misadjustment Loosely installed accelerator pedal position sensor |
DESCRIPTION AND POSSIBLE CAUSE
NO.26 EXHAUST SULPHUR SMELL [LF, L3]
| 26 | EXHAUST SULPHUR SMELL |
|---|
| DESCRIPTION | Rotten egg smell (sulphur) from exhaust |
| POSSIBLE CAUSE | Electrical connectors are disconnected or connected poorly Charcoal canister malfunction Vacuum lines are disconnected or connected improperly. Improper fuel pressure Poor fuel quality WARNING: The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains fuel system diagnosis and repair procedures. Read following warnings before servicing fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.28 FUEL FILLING SHUT OFF CONCERNS [LF, L3]
| 28 | FUEL FILLING SHUT OFF CONCERNS |
|---|
| DESCRIPTION | Fuel does not shut off properly. |
| POSSIBLE CAUSE | Clogged EVAP pipes Nonreturn valve malfunction Fuel shut-off valve malfunction Fuel nozzle malfunction Fuel nozzle is not inserted correctly. WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
NO.29 SPARK PLUG CONDITION [LF, L3]
| 29 | SPARK PLUG CONDITION |
|---|
| DESCRIPTION | Incorrect spark plug condition |
| POSSIBLE CAUSE | NOTE: Inspecting spark plugs condition can determine whether problem is related to a specific cylinder or possibly all cylinders. Wet/carbon stuck on specific plug: Spark-Weak, not visible Air/fuel mixture-Excessive fuel injection volume Compression-No compression, low compression Malfunction spark plug Grayish white with specific plug: Air/fuel mixture-Insufficient fuel injection volume Malfunction spark plug Wet/carbon is stuck on all plugs: Spark-Spark weak Air/fuel mixture-Too rich Compression-Low compression Clogging in intake/exhaust system Grayish white with all plugs: Air/fuel mixture-Too lean WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) CAUTION: Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| NOTE |
|---|
| Inspecting spark plugs condition can determine whether problem is related to a specific cylinder or possibly all cylinders. |
| WARNING |
|---|
| The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before servicing the fuel system: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE SERVICE PRECAUTION" and "AFTER SERVICE PRECAUTION" described in this manual. (See BEFORE SERVICE PRECAUTION [LF, L3] .) (See AFTER SERVICE PRECAUTION [LF, L3] .) |
| CAUTION |
|---|
| Disconnecting/connecting quick release connector without cleaning it may cause damage to fuel pipe and quick release connector. Always clean quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
DESCRIPTION AND POSSIBLE CAUSE
Water Sprinkling Method
If malfunction occurs only under high humidity or rainy/snowy weather, perform the following steps
| CAUTION | Indirectly change the temperature and humidity by spraying water onto the front of the radiator. If a vehicle is subject to water leakage, the leakage may damage the control module. When testing a vehicle with a water leakage problem, special caution must be used. |
Scheme 22
- Connect the M-MDS to the DLC-2 if you are inspecting sensors or switches.
- Turn the ignition switch to the ON position (Engine off). NOTE: If the engine starts and runs, perform the following steps at idle.
- Access PIDs for sensor or switch if you are inspecting sensors or switches.
- If you are inspecting the switch, turn it on manually.
- Spray water onto the vehicle or run it through a car wash. If PID value is unstable or malfunction occurs, repair or replace part if necessary.
Finding irregular signals
While referring to ON-BOARD DIAGNOSTIC TEST [LF, L3] , use the PID/DATA monitor and record function to inspect the input signal system relating to the problem.
- Start the engine and idle the vehicle. You can assume that any signals that are out of specification by a wide margin are irregular.
- When recreating the problem, any sudden change in monitor input signals that is not intentionally created by the driver can be determined as irregular.
Locating the source of unusual signals
| CAUTION | Compare the M-MDS monitor voltage with the measurement voltage using the digital measurement system function. If you use another tester, misreading may occur. When measuring voltage, attach the tester GND to the GND of the PCM that is being tested, or to the engine itself. If this is not performed, the measured voltage and actual voltage may differ. After connecting the pin to a waterproof coupler, confirming continuity and measuring the voltage, inspect the waterproof connector for cracks. If there are any, use sealant to fix them. Failure to do this may result in deterioration of the wiring harness or terminal from water damage, leading to problems with the vehicle. |
Scheme 23
Scheme 23: Variable resistance type 1 (TP sensor and EGR boost sensor)
Engine speed
| Load condition | Engine speed (rpm) (1) |
|---|
| MTX | ATX |
| No load | 600-700 | 650-750 |
| E/L operating (2) | 38-48 A | 650-750 |
| More than 48 A | 700-800 |
| A/C operating (3) | Refrigerant pressure low (4) | 700-800 | 650-750 |
| Refrigerant pressure high (5) | 700-800 | 670-770 |
| (1) Neutral or P position (2) Generator generating current value (3) A/C switch and fan switch are on. (4) Refrigerant pressure switch (middle pressure) is off. (5) Refrigerant pressure switch (middle pressure) is on. |
| (2) | Generator generating current value |
| (3) | A/C switch and fan switch are on. |
| (4) | Refrigerant pressure switch (middle pressure) is off. |
| (5) | Refrigerant pressure switch (middle pressure) is on. |
ENGINE SPEED SPECIFICATIONS
When idling cannot be continued
- Remove the oil control valve (OCV) and verify that the spool valve is at maximum retard position.
- Connect the oil control valve (OCV).
- Turn the ignition switch to the ON position.
- Verify that the spool valve is at maximum retard position. If the spool valve is stuck in the advance direction, inspect for the following: Short circuit in wiring harnesses or connectors between the oil control valve (OCV) and the PCM.
- Inspect the variable valve timing actuator. (See «VARIABLE VALVE TIMING ACTUATOR INSPECTION [LF, L3]»(ref-345205-S19201124902009102000000) .)
When idling can be continued
- Disconnect oil control valve (OCV) connector.
- Warm up the engine and idle it.
- Apply battery voltage to the oil control valve (OCV) and verify that the engine idles roughly or stalls. If the engine idles roughly or stalls, inspect the timing chain component (valve timing deviation). If the engine does not idle roughly or stalls, go to the next step.
- Remove the oil control valve (OCV) and perform spool valve operation inspection. (See «OIL CONTROL VALVE (OCV) INSPECTION [LF, L3]»(ref-345205-S05012471992009102000000) ) If not as specified, inspect the following: Oil control valve (OCV) Harnesses and connectors between oil control valve (OCV) and PCM open or short. If as specified, inspect the following hydraulic passages for clogging or leakage or both: Oil pressure switch - oil control valve (OCV) Oil control valve (OCV) - camshaft Camshaft internal passage
- If they are normal, replace the camshaft pulley (with built-in variable valve timing actuator).
