NO.1 MELTING OF MAIN OR OTHER FUSES [L5]
NO.1 MELTING OF MAIN OR OTHER FUSES (L5) REFERENCE CHART 1 MELTING OF MAIN OR OTHER FUSES [TROUBLESHOOTING HINTS] Inspect condition of fuse. Damaged Fuse Related Wiring Harness MAIN BTN fuse ROOM fuse FAN fuse IG KEY2 fuse Generator BTN ROOM fuse ROOM DLC-2 FAN Fan control module IG KEY2 Starter relay FUEL Fuel pump unit ST SIG Starter relay EGI INJ Fuel injector No.1 Fuel injector NO.2 Fuel injector NO.3 Fuel injector NO.4 ENG+B PCM Canister vent solenoid valve PCM PCM ENGINE IG Ignition coil NO.1 Ignition coil NO.2 Ignition coil NO.3 Ignition coil NO.4 O2 SSR HO2S ENGINE Variable tumble solenoid valve OCV Variable intake air solenoid valve EGR valve Purge solenoid valve A/F sensor MAF/IAT sensor
Scheme 52
Scheme 52: NO.1 MELTING OF MAIN OR OTHER FUSES [L5]
NO.2 MIL ILLUMINATES [L5]
| 2 | MIL ILLUMINATES |
|---|
| DESCRIPTION | MIL is illuminated incorrectly. |
| POSSIBLE CAUSE | MIL illuminates for emission-related concern (PCM DTC is stored) 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 [L5]
| 3 | WILL NOT CRANK |
|---|
| DESCRIPTION | Starter does not work. |
| POSSIBLE CAUSE | Coil antenna connector or terminals malfunction Instrument cluster or related wiring harness malfunction Immobilizer system malfunction Coil antenna circuit or related connectors malfunction Charging system malfunction Open or short circuit in wiring harness between PCM terminal 1BB and starter relay TR switch mis-adjustment Open or short circuit in wiring harness between TR switch and TCM Open or short circuit in wiring harness between starter relay and ignition switch Ignition switch or related wiring harness malfunction Open or short circuit in wiring harness between starter relay and battery positive terminal Open or short circuit in wiring harness between starter relay and starter Starter malfunction Seized/hydro locked engine, drive plate PCM continuous memory DTC is stored Starter circuit in ignition switch Open circuit in wiring harness between ignition switch and starter Advanced keyless entry and start system malfunction Starter relay malfunction Keyless control module malfunction TR switch malfunction Starter related wiring harness malfunction Immobilizer system operates properly |
DESCRIPTION AND POSSIBLE CAUSE
NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [L5]
| 4 | HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK |
|---|
| DESCRIPTION | Starter cranks engine at normal speed but engine requires excessive cranking time before starting. |
| POSSIBLE CAUSE | PCM DTC is stored Cooling system malfunction Ignition coil related wiring harness malfunction Ignition system malfunction Spark plug malfunction CKP sensor and teeth of crankshaft pulley malfunction Improper operation of electronic throttle control system Excessive fuel pressure Fuel leakage from fuel system Purge solenoid valve malfunction MAF sensor malfunction Restriction in exhaust system EGR valve malfunction Starting system malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 5 | ENGINE STALLS-AFTER START/AT IDLE |
|---|
| DESCRIPTION | Engine stops unexpectedly at idle and/or after start. |
| POSSIBLE CAUSE | Coil antenna connector or terminals malfunction Instrument cluster or related wiring harness malfunction Immobilizer system malfunction Coil antenna or related wiring harness Air cleaner restriction Improper installation of EGR valve Electrical connector disconnection Poor fuel quality Ignition wiring malfunction Air leakage from intake air system Intake air system restriction Improper operation of electronic throttle control system Vacuum leakage APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction PCM continuous memory DTC is stored CKP sensor or related wiring harness malfunction CKP sensor and teeth of crankshaft pulley malfunction Ignition coil or related wiring harness intermittent malfunction Ignition system malfunction Spark plug malfunction Exhaust system part malfunction Excessive fuel pressure Fuel leakage from fuel system Improper operation of A/C system Purge solenoid valve malfunction Evaporative emission control system malfunction EGR valve malfunction Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Immobilizer system operates 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 6 | CRANKS NORMALLY BUT WILL NOT START |
|---|
| DESCRIPTION | The starter cranks engine at normal speed but 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 | Coil antenna connector or terminals malfunction Instrument cluster or related wiring harness malfunction Immobilizer system malfunction Immobilizer system operating Coil antenna or related wiring harness Vacuum leakage External fuel shut off or accessory Poor fuel quality Air leakage from intake air system Intake air system restriction Proper sealing of intake manifold and components attached to intake manifold: EGR valve Ignition wiring malfunction Electrical connector disconnection Fuse malfunction Improper operation of electronic throttle control system APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction PCM continuous memory DTC is stored Improper operation of electronic throttle control system CKP sensor or related wiring harness malfunction CKP sensor and teeth of crankshaft pulley malfunction Ignition coil or related wiring harness malfunction Spark plug malfunction Exhaust system part malfunction Excessive fuel pressure Fuel leakage from fuel system Purge solenoid valve malfunction Evaporative emission control system malfunction EGR valve malfunction Improper operation of variable valve timing control system Low engine compression 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 7 | SLOW RETURN TO IDLE |
|---|
| DESCRIPTION | Engine takes more time than normal to return to idle speed. |
| POSSIBLE CAUSE | PCM DTC is stored 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 [L5]
| 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 | Idle learning of electronic throttle control system is not completed Electrical connector disconnection External fuel shut off or accessory Poor fuel quality Fuse malfunction Ignition wiring malfunction Air leakage from intake air system PCM ground circuit (1E, 1F, 1G or 1 BE) malfunction Improper installation EGR valve Improper operation of electronic throttle control system PCM DTC is stored MAF sensor or related wiring harness malfunction Improper operation of A/C system CKP sensor and teeth of crankshaft pulley malfunction Ignition coil or related wiring harness malfunction Spark plug malfunction Excessive fuel pressure Fuel leakage from fuel system Purge solenoid valve malfunction Evaporative emission control system malfunction CMP sensor and teeth of camshaft malfunction EGR valve malfunction Improper operation of variable valve timing control system Low engine compression PCV valve malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 9 | FAST IDLE/RUNS ON |
|---|
| DESCRIPTION | Engine speed continues at fast idle after warm-up. Engine runs after the ignition is off. |
| POSSIBLE CAUSE | ECT sensor malfunction A/C switch malfunction Refrigerant pressure sensor malfunction Evaporator temperature sensor malfunction FAN switch malfunction Communication error between climate control unit and instrument cluster Communication error between instrument cluster and PCM TR switch malfunction Communication error between TCM and PCM Air leakage from intake air system Improper operation of electronic throttle control system APP sensor malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.10 LOW IDLE/STALLS DURING DECELERATION [L5]
| 10 | LOW IDLE/STALLS DURING DECELERATION |
|---|
| DESCRIPTION | Engine stops unexpectedly at beginning of deceleration or recovery from deceleration. |
| POSSIBLE CAUSE | ECT sensor malfunction Improper operation of A/C magnetic clutch? Vacuum leakage Air leakage from intake air system PCM DTC is stored? Improper operation of electronic throttle control system Improper operation of evaporative emission control system APP sensor malfunction TP sensor malfunction MAF sensor malfunction VSS malfunction A/C switch malfunction Refrigerant pressure sensor malfunction? Evaporator temperature sensor malfunction FAN switch malfunction? Communication error between climate control unit and instrument cluster Communication error between instrument cluster and PCM TR switch malfunction Communication error between TCM and PCM |
DESCRIPTION AND POSSIBLE CAUSE
NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [L5]
| 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 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 | Air cleaner restriction Electrical connector disconnection Poor fuel quality Ignition wiring malfunction Air leakage from intake air system Intake air system restriction Improper operation of EGR valve Improper operation of electronic throttle control system Vacuum leakage PCM DTC is stored Engine overheating APP sensor malfunction TP sensor malfunction MAP sensor malfunction BARO sensor malfunction CKP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction Battery power supply circuit malfunction VSS or related wiring harness malfunction CKP sensor and teeth of crankshaft pulley malfunction Spark plug malfunction Exhaust system part malfunction Excessive fuel pressure Fuel leakage from fuel system Improper operation of A/C control system Improper operation of cruise control system A/F sensor malfunction Fuel shut-off valve malfunction Purge solenoid valve malfunction Evaporative emission control system malfunction CMP sensor and teeth of camshaft malfunction Improper operation of variable valve timing control system EGR valve malfunction Low engine compression Improper valve timing Check valve (two-way) malfunction PCV valve malfunction ATX internal malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 12 | LACK/LOSS OF POWER-ACCELERATION/CRUISE |
|---|
| DESCRIPTION | Performance is poor under load (such as power down when climbing hills). |
| POSSIBLE CAUSE | Poor fuel quality Air leakage from intake air system Intake air system restriction Improper installation of EGR valve Vacuum leakage PCM DTC is stored Engine overheating APP sensor malfunction TP sensor malfunction CKP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction IAT sensor or related wiring harness malfunction Battery power supply circuit malfunction VSS or related wiring harness malfunction CKP sensor and teeth of crankshaft pulley malfunction Spark plug malfunction Fuel leakage from fuel injector Fuel injector is clogging Improper operation of electronic throttle control system Exhaust system part malfunction Excessive fuel pressure Improper operation of variable tumble control Improper operation of variable intake air control Improper operation of A/C system Purge solenoid valve malfunction Evaporative emission control system malfunction CMP sensor and teeth of camshaft malfunction EGR valve malfunction Improper operation of variable valve timing control system Low engine compression Improper valve timing PCV valve malfunction Brake dragging 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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-ACCELERATION/CRUISE [L5]
| 13 | KNOCKING/PINGING-ACCELERATION/CRUISE |
|---|
| DESCRIPTION | Sound is produced 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 PCM DTC is stored Low engine compression Excessive fuel pressure KS malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 14 | POOR FUEL ECONOMY |
|---|
| DESCRIPTION | Fuel economy is unsatisfactory. |
| POSSIBLE CAUSE | Contaminated air cleaner element Improper ATF level Brake dragging Improper coolant level Poor fuel quality PCM DTC is stored Engine cooling system malfunction Spark plug malfunction Excessive fuel pressure Improper operation of variable tumble control Improper operation of variable valve timing control system Improper operation of variable valve intake air control Exhaust system clogging Contaminated MAF sensor Low engine compression Improper valve timing PCV valve malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 15 | EMISSION COMPLIANCE |
|---|
| DESCRIPTION | Fails emissions test. |
| POSSIBLE CAUSE | Electrical connector disconnection Intake air system and air cleaner element malfunction Vacuum lines leakage or blockage PCM DTC is stored Cooling system malfunction Fuel-filler cap malfunction A/F sensor malfunction Spark plug malfunction Ignition system improper operation Erratic or no signal from CMP sensor Excessive fuel pressure Charcoal canister malfunction Exhaust system clogging TWC malfunction EGR system malfunction Base engine malfunction Improper engine compression Improper valve timing PCV valve malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 16 | HIGH OIL CONSUMPTION/LEAKAGE |
|---|
| DESCRIPTION | Oil consumption is excessive. |
| POSSIBLE CAUSE | Improper dipstick Improper engine oil viscosity PCV valve malfunction Engine internal parts malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [L5]
| 17 | COOLING SYSTEM CONCERNS-OVERHEATING |
|---|
| DESCRIPTION | Engine runs at higher than normal temperature/overheats. |
| POSSIBLE CAUSE | Radiator hoses damage Coolant leakage Leakage around heater unit Leakage at coolant hoses and/or radiator Improper coolant level Fans reverse rotation Fuse malfunction Coolant overflow system malfunction Poor radiator condition Improper or damaged radiator cap Improper water/anti-freeze mixture PCM, climate control unit, instrument cluster or multi information display DTC is stored Improper operation of A/C system Climate control unit malfunction (A/C switch malfunction or climate control unit does not determine A/C request or transmit the A/C request signal) Instrument cluster malfunction (does not receive A/C request signal from climate control unit or transmit it to PCM) Communication error between PCM and instrument cluster Communication error between instrument cluster and climate control unit (Full-auto air conditioner) Short to ground circuit between BCM terminal 3L and climate control unit terminal J (Manual air conditioner) Improper operation of cooling fan control system Improper tension of drive belt Thermostat malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [L5]
| 18 | COOLING SYSTEM CONCERNS-RUNS COLD |
|---|
| DESCRIPTION | Engine does not reach normal operating temperature. |
| POSSIBLE CAUSE | A/C and heater system malfunction Thermostat malfunction Improper operation of cooling fan control system |
DESCRIPTION AND POSSIBLE CAUSE
NO.19 EXHAUST SMOKE [L5]
| 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 PCM DTC is stored Excessive fuel pressure CMP sensor malfunction Ignition system malfunction Improper engine compression Improper fuel injection timing and amount 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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) [L5]
| 20 | FUEL ODOR (IN ENGINE COMPARTMENT) |
|---|
| DESCRIPTION | Gasoline fuel smell or visible leakage. |
| POSSIBLE CAUSE | Excessive fuel pressure Fuel leakage from fuel system Fuel tank vent system blockage Purge solenoid valve malfunction PCM DTC is stored Charcoal canister malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 23 | A/C DOES NOT WORK SUFFICIENTLY |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not engage when A/C is turned on. |
| POSSIBLE CAUSE | PCM, climate control unit, instrument cluster or multi information display DTC is stored Refrigerant pressure sensor malfunction Improper refrigerant charging amount Seized A/C compressor Evaporator temperature sensor malfunction Open or short circuit in wiring harness between evaporator temperature sensor and climate control unit (Full-auto air conditioner) Instrument cluster malfunction (Does not receive A/C request signal from climate control unit or transmit it to PCM) Multi information display malfunction Climate control unit malfunction (A/C switch malfunction or climate control unit does not determine A/C request or transmit the A/C request signal) Open or short circuit in wiring harness between climate control unit terminal J and BCM terminal 3L (Manual air conditioner) A/C compressor malfunction Open circuit in wiring harness between A/C compressor terminal A and body ground A/C relay malfunction Open circuit in wiring harness between A/C relay and PCM terminal 11 Open circuit in wiring harness between ignition switch (IG2) and A/C relay Open circuit in wiring harness between battery positive terminal and A/C relay Open circuit in wiring harness between A/C relay and A/C magnetic clutch |
DESCRIPTION AND POSSIBLE CAUSE
NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L5]
| 24 | A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not disengage. |
| POSSIBLE CAUSE | PCM, instrument cluster or climate control unit DTC is stored Short to power supply in wiring harness between A/C relay and magnetic clutch A/C compressor magnetic clutch engagement is stuck A/C relay malfunction Short to ground in wiring harness between A/C relay and PCM Short to ground in wiring harness between climate control unit terminal J and BCM terminal 3L (Manual air conditioner) Climate control unit malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.25 A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [L5]
| 25 | A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS |
|---|
| DESCRIPTION | A/C compressor magnetic clutch does not disengage under wide open throttle. |
| POSSIBLE CAUSE | PCM DTC is stored APP sensor malfunction |
DESCRIPTION AND POSSIBLE CAUSE
NO.26 EXHAUST SULPHUR SMELL [L5]
| 26 | EXHAUST SULPHUR SMELL |
|---|
| DESCRIPTION | Rotten egg smell (sulphur) from exhaust. |
| POSSIBLE CAUSE | Electrical connector disconnection Poor fuel quality Vacuum leakage PCM DTC is stored Improper fuel pressure Charcoal canister malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 [L5]
| 28 | FUEL FILLING SHUT OFF CONCERNS |
|---|
| DESCRIPTION | Fuel does not shut off properly. |
| POSSIBLE CAUSE | PCM DTC is stored Nonreturn valve malfunction Fuel nozzle is not inserted correctly Fuel nozzle malfunction Fuel shut-off valve malfunction 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the 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 [L5]
| 29 | SPARK PLUG CONDITION |
|---|
| DESCRIPTION | Incorrect spark plug condition. |
| POSSIBLE CAUSE | NOTE: Inspecting the spark plug conditions can determine whether a 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, excessive fuel line pressure Compression-Low compression Clogging in intake/exhaust system Grayish white with all plugs: Air/fuel mixture-Too lean, insufficient fuel line 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material. |
| NOTE |
|---|
| Inspecting the spark plug conditions can determine whether a 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 [L5] .) (See AFTER SERVICE PRECAUTION [L5] .) |
| CAUTION |
|---|
| Disconnecting/connecting the quick release connector without cleaning it may cause damage to the fuel pipe and the quick release connector. Always clean the 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 53
- 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 01-02B-6 ON-BOARD DIAGNOSTIC TEST [L5], 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 ground to the ground 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 54
Scheme 54: Input signal system inspection for thermistor type
- When an irregular signal is detected, measure the #1 PCM terminal voltage. If the #1 terminal voltage and the M-MDS monitor voltage are the same, proceed to the next step. If there is a difference of 0.5 V or more, inspect the following points concerning the PCM connector: Female terminal opening loose Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected
- Measure the #2 sensor terminal voltage. If there is a 0.5 V or more difference between the sensor and the M-MDS voltages, inspect the wiring harness for open or short circuits. If the sensor and the M-MDS voltages are the same, inspect the following points concerning the sensor connector: Female terminal opening is loose Coupler (pin holder) damage Pin discoloration (blackness) Harness/pin crimp is loose or disconnected If there are no problems, proceed to next investigation below.
Cooling fan NO.1 and NO.2 do not operate
- Inspect for followings: Open circuit between the cooling fan relay NO.1/NO.2 control module and battery post Open circuit between cooling fan relay NO.1/NO.2 control module and ground Poor contact at cooling fan relay ground point If there is no malfunction, replace the PCM. (See «PCM REMOVAL/INSTALLATION [L5]»(ref-375347-S19052500852010102800000) .)
Cooling fan motor NO.1 does not operate
- Inspect for followings: Open or short to ground circuit between the fan control module NO.1 and cooling fan motor NO.1 Open or short to ground circuit between the fan control module NO.1 and cooling fan relay NO.1 Open circuit between the fan control module NO.1 and ground Cooling fan relay NO.1 malfunction Poor contact at cooling fan control module NO.1 ground point Poor connection of the fan control module NO.1 connector or cooling fan motor NO.1 connector If there is no malfunction, replace the cooling fan component NO.1. (See «COOLING FAN MOTOR REMOVAL/INSTALLATION [L5]»(ref-375353-S18765877472010102800000) .)
Cooling fan motor NO.2 does not operate
- Inspect for followings: Open or short to ground circuit between the fan control module NO.2 and cooling fan motor NO.2 Open or short to ground circuit between the fan control module NO.2 and cooling fan relay NO.2 Open circuit between the fan control module NO.2 and ground Cooling fan relay NO.2 malfunction Poor contact at cooling fan control module NO.2 ground point Poor connection of the fan control module NO.2 connector or cooling fan motor NO.2 connector If there is no malfunction, replace the cooling fan component NO.2. (See «COOLING FAN MOTOR REMOVAL/INSTALLATION [L5]»(ref-375353-S18765877472010102800000) .)
EVAP system malfunction judgment
- M-MDS detect the small/large leak or blockage based on fuel tank pressure at the end of EVAP Test.
Scheme 55
Scheme 56
Scheme 56: Evaporative system test procedure
- Verify that all PIDs within the following specifications. NOTE: To successfully perform this procedure, all PIDs must be within the specifications before proceeding to the next step.
- Select the following items from the initialization screen of the M-MDS. Select the "Powertrain". Select the "Fuel". Select the "EVAP Test". Verify that ECT and IAT are within the specifications at the confirmation screen. To successfully perform this procedure, ECT and IAT must be within the spec before proceeding to the next step. Fuel Level must be maintained within 15%-85% . PCM will cancel the EVAP Test If the Fuel Level is lower than 15% or higher than 85% .
- Verify the test results described on the M-MDS and follow the instructions.
EVAP system leak inspection using leak tester
Scheme 57
Scheme 58
- Perform the following SST (EVAP System Tester 134-01049A) self-test: NOTE: If the tester does not work correctly during the self-test, refer to the tester operators manual for a more detailed self-test procedure. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle valve. Connect the vehicle interface hose (part of the SST ) to the SELF-TEST port located on the control panel. Hand tighten the fitting. (Do not overtighten.) Turn the control valve to the TEST position. The gauge should read 331-381 mm {13-15 in} of water. If the gauge is not reading in this range, adjust the pressure by turning the black knob on the low pressure regulator at the nitrogen bottle. Turn the control valve to the HOLD position. Verify that the gauge holds pressure and that the flow meter reads no flow. If there is no drop in pressure and no flow, the tester passes the self-test. If the gauge leaks down, refer to the tester operators manual.
- Connect the SST to the vehicle. Verify that the control valve on the panel is in the HOLD position then open the nitrogen bottle valve. Remove the fuel-filler cap from the vehicle. If the fuel-filler cap is not a MAZDA part or equivalent, replace it. NOTE: INSPECT FUEL FILLER CAP AND FILLER NECK Visually inspect for damage, insufficient sealing, rust, cracks or warps for filler cap and filler neck. Repair or replace if necessary. Connect the receiver assembly ( SST: 134-01059) to the vehicle cap test hose assembly (part of the SST ) and the fuel-filler cap from the vehicle. Connect the cap adaptor ( SST: 134-01058) to the vehicle cap test hose assembly (part of the SST ) and to the fuel-filler neck. Connect the vehicle interface hose (part of the SST ) to the center fitting of the vehicle cap test hose assembly (part of the SST ).
- Connect the M-MDS to the DLC-2.
- Turn the ignition switch to the ON position (engine off).
- Request the PCM on-board device control (Mode 08) using the M-MDS to close the canister vent value. NOTE: The canister vent value is closed for 10 min unless the following any actions are done: The engine is started. The ignition is switched to off.
- Make sure the control valve on the 134-01049A is in the HOLD position and that the valve on the cylinder of nitrogen gas is open.
- Turn the control valve to the open position and let the system fill. You should note a drop in the gauge pressure along with the flow meter being pegged at maximum flow for several minutes depending on how full or empty the fuel tank is, and how long it takes to completely fill and pressurize the evaporative emissions system hoses.
- If the gauge and the flow meter do not settle to a measurable level after 2-3 min , then refer to the Mazda Workshop Manual to verify that the canister vent valve is properly closed. If canister vent valve is properly closed. The EVAP system has large leakage. Check for leakage and repair as necessary.
- Verify the pressure gauge and flow meter reading to determine if there is an evaporative emissions leak: NO EVAPORATIVE LEAK: The flow meter registers "zero flow" and the pressure gauge returns to the pre-set pressure of 356 mm {14 in} of water (H20). EVAPORATIVE LEAK: The pressure does not return to the preset level of 356 mm {14 in} of water (H20) when measuring the flow. See SETTING LEAK STANDARD FOR TESTING (.020 to .040 inch H20) of the Evaporative Emissions Tester operators manual (134-01067). NOTE: Turn the control valve to the HOLD position then disconnect the SST .
![Scheme 52: NO.1 MELTING OF MAIN OR OTHER FUSES [L5]](https://i.diagnostdata.com/repair/c6/c60f1f247bf252bd980070133c7585ec81774479377b3793e10ca9074263d1f0.webp)
