Symptom Troubleshooting - Engine Controls [Mzr 1.5]: Other — Mazda 2 II рестайлинг (2010-2014)

NO.1 MELTING OF MAIN OR OTHER FUSES [MZR 1.5]

1 MELTING OF MAIN OR OTHER FUSES [TROUBLESHOOTING HINTS] Inspect condition of fuse

Scheme 14

Scheme 14: NO.1 MELTING OF MAIN OR OTHER FUSES [MZR 1.5]

Damaged Fuse	Related Wiring Harness
MAIN	ROOM fuse IG KEY1 fuse IG KEY2 fuse FAN2 fuse FUEL PUMP fuse
ROOM	DLC-2
IG KEY1	Ignition switch METER fuse ENG fuse
METER	Cooling fan relay No.1 PCM Cooling fan relay No.2 PCM
ENG	PCM
IG KEY2	Ignition switch Starter relay Starter relay Starter
FAN2	Cooling fan relay No.1 Cooling fan motor Cooling fan relay No.2 Cooling fan motor
FUEL PUMP	Fuel pump relay Fuel pump
STR	Generator Starter
EGI	PCM Main relay ENG BAR fuse EGI INJ fuse
ENG BAR	CVV (canister vent cut valve) PCM PCM Vehicle speed sensor (ATX)
EGI INJ	PCM Fuel pump relay PCM

NO.2 MIL ILLUMINATES [MZR 1.5]

2	MIL ILLUMINATES
DESCRIPTION	The MIL is illuminated incorrectly.
POSSIBLE CAUSE	The MIL illuminates for emission-related concern (DTC is stored in the PCM). Instrument cluster malfunction PCM malfunction NOTE: If the MIL blinks at steady rate, misfire condition could exist.

NOTE
If the MIL blinks at steady rate, misfire condition could exist.

NO.3 WILL NOT CRANK [MZR 1.5]

3 WILL NOT CRANK DESCRIPTION The starter does not work. POSSIBLE CAUSE Poor connection of coil antenna connector Instrument cluster or related wiring harness malfunction Immobilizer system malfunction (DTC is stored) Immobilizer system related wiring harness or connector malfunction Open circuit in wiring harness between ignition switch and starter relay TR switch malfunction (ATX) TR switch misadjustment (ATX) Starter interlock switch malfunction (MTX) Open circuit in wiring harness between TR switch terminal A and PCM terminal 1X (ATX) Open circuit in wiring harness between starter interlock switch terminal B and PCM terminal 1X (MTX) Low or dead battery Charging system malfunction Starter malfunction Ignition switch malfunction Seized/hydro locked engine, flywheel (MTX) or drive plate (ATX) Immobilizer system and/or circuit malfunction Immobilizer system operating properly (Ignition key is not registered) PCM malfunction

NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [MZR 1.5]

4	HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK
DESCRIPTION	The starter cranks the engine at normal speed but the engine requires excessive cranking time before starting. The battery is in normal condition.
POSSIBLE CAUSE	Air cleaner restriction Cracks on intake-air system parts Loose bands on intake-air system Poor fuel quality Vacuum leakage Air leakage from intake-air system Engine overheating Ignition coil and related wiring harness malfunction Spark plug malfunction CKP sensor and teeth of the crankshaft pulley malfunction Improper operation of drive-by-wire control system Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Check valve malfunction (built-in fuel pump unit) Purge solenoid valve malfunction (stuck open) MAF sensor malfunction MAF sensor contamination Incorrect MAF sensor ground voltage Restriction in exhaust system EGR valve malfunction Starting system malfunction PCV valve malfunction Improper air/fuel mixture ratio control PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK

DESCRIPTION

The starter cranks the engine at normal speed but the engine requires excessive cranking time before starting. The battery is in normal condition.

POSSIBLE CAUSE

Air cleaner restriction Cracks on intake-air system parts Loose bands on intake-air system Poor fuel quality Vacuum leakage Air leakage from intake-air system Engine overheating Ignition coil and related wiring harness malfunction Spark plug malfunction CKP sensor and teeth of the crankshaft pulley malfunction Improper operation of drive-by-wire control system Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Check valve malfunction (built-in fuel pump unit) Purge solenoid valve malfunction (stuck open) MAF sensor malfunction MAF sensor contamination Incorrect MAF sensor ground voltage Restriction in exhaust system EGR valve malfunction Starting system malfunction PCV valve malfunction Improper air/fuel mixture ratio control PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.5 ENGINE STALLS-AFTER START/AT IDLE [MZR 1.5]

5	ENGINE STALLS-AFTER START/AT IDLE
DESCRIPTION	The engine stops unexpectedly at idle and/or after start.
POSSIBLE CAUSE	Poor connection of coil antenna connector Instrument cluster or related wiring harness malfunction Immobilizer system malfunction (DTC is stored) Immobilizer system related wiring harness or connector malfunction Continuous memory DTC is stored Improper operation of drive-by-wire control system Air leakage from intake-air system Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Intake-air system restriction Vacuum leakage Improper operation of drive-by-wire control system CKP sensor and related wiring harness malfunction Improper operation of fuel injector Improper operation of fuel pump Improper operation of ignition system Ignition coil malfunction Spark plug malfunction Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel leakage from fuel system EVAP control system malfunction Improper operation of EGR control system Improper operation of A/C system Restriction in exhaust system Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

ENGINE STALLS-AFTER START/AT IDLE

DESCRIPTION

The engine stops unexpectedly at idle and/or after start.

POSSIBLE CAUSE

Poor connection of coil antenna connector Instrument cluster or related wiring harness malfunction Immobilizer system malfunction (DTC is stored) Immobilizer system related wiring harness or connector malfunction Continuous memory DTC is stored Improper operation of drive-by-wire control system Air leakage from intake-air system Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Intake-air system restriction Vacuum leakage Improper operation of drive-by-wire control system CKP sensor and related wiring harness malfunction Improper operation of fuel injector Improper operation of fuel pump Improper operation of ignition system Ignition coil malfunction Spark plug malfunction Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel leakage from fuel system EVAP control system malfunction Improper operation of EGR control system Improper operation of A/C system Restriction in exhaust system Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.6 CRANKS NORMALLY BUT WILL NOT START [MZR 1.5]

6	CRANKS NORMALLY BUT WILL NOT START
DESCRIPTION	The starter cranks the engine at normal speed but the engine will not run. Refer to the symptom troubleshooting "NO.5 ENGINE STALLS-AFTER START/AT IDLE" if this symptom appears after engine stall. Fuel is in the tank. Battery is in normal condition.
POSSIBLE CAUSE	Poor connection of coil antenna connector Instrument cluster or related wiring harness malfunction Immobilizer system malfunction (DTC is stored) Immobilizer system related wiring harness or connector malfunction Continuous memory DTC is stored Air leakage from intake-air system Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Intake-air system restriction Vacuum leakage Improper operation of drive-by-wire control system CKP sensor and related wiring harness malfunction Improper operation of fuel injector Improper operation of fuel pump Improper operation of ignition system Ignition coil malfunction Spark plug malfunction Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel leakage from fuel system EVAP control system malfunction Improper operation of EGR control system Improper operation of A/C system Restriction in exhaust system Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

CRANKS NORMALLY BUT WILL NOT START

DESCRIPTION

The starter cranks the engine at normal speed but the engine will not run. Refer to the symptom troubleshooting "NO.5 ENGINE STALLS-AFTER START/AT IDLE" if this symptom appears after engine stall. Fuel is in the tank. Battery is in normal condition.

POSSIBLE CAUSE

Poor connection of coil antenna connector Instrument cluster or related wiring harness malfunction Immobilizer system malfunction (DTC is stored) Immobilizer system related wiring harness or connector malfunction Continuous memory DTC is stored Air leakage from intake-air system Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Intake-air system restriction Vacuum leakage Improper operation of drive-by-wire control system CKP sensor and related wiring harness malfunction Improper operation of fuel injector Improper operation of fuel pump Improper operation of ignition system Ignition coil malfunction Spark plug malfunction Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel leakage from fuel system EVAP control system malfunction Improper operation of EGR control system Improper operation of A/C system Restriction in exhaust system Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.7 SLOW RETURN TO IDLE [MZR 1.5]

7	SLOW RETURN TO IDLE
DESCRIPTION	The engine takes more time than normal to return to idle speed.
POSSIBLE CAUSE	Continuous memory DTC is stored Thermostat malfunction (stuck open) ECT sensor No.1 malfunction Air leakage from intake-air system Throttle body contamination PCM malfunction

NO.8 ENGINE RUNS ROUGH/ROLLING IDLE [MZR 1.5]

8	ENGINE RUNS ROUGH/ROLLING IDLE
DESCRIPTION	The engine speed fluctuates between the specified idle speed and lower speed and the engine shakes excessively. The idle speed is too slow and the engine shakes excessively.
POSSIBLE CAUSE	Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Air leakage from intake-air system Open or short circuit in PCM ground circuit (PCM terminals 2AZ, 2BA, 2BB, 2BD and 2BH) Improper operation of throttle valve Continuous memory DTC is stored Engine overheating MAF sensor and related wiring harness malfunction Improper operation of A/C system CKP sensor and teeth of the crankshaft pulley Ignition coil and related wiring harness Spark plug malfunction Improper operation of drive-by-wire control system Inadequate fuel pressure Restriction in fuel line Fuel pump mechanical malfunction Pressure regulator malfunction (built-in fuel pump unit) Fuel leakage from fuel system Check valve malfunction (built-in fuel pump unit) Improper operation of fuel injector EVAP control system malfunction Purge solenoid valve malfunction (stuck open) Restriction in exhaust system CMP sensor and teeth of camshaft pulley EGR valve malfunction Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

ENGINE RUNS ROUGH/ROLLING IDLE

DESCRIPTION

The engine speed fluctuates between the specified idle speed and lower speed and the engine shakes excessively. The idle speed is too slow and the engine shakes excessively.

POSSIBLE CAUSE

Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Air leakage from intake-air system Open or short circuit in PCM ground circuit (PCM terminals 2AZ, 2BA, 2BB, 2BD and 2BH) Improper operation of throttle valve Continuous memory DTC is stored Engine overheating MAF sensor and related wiring harness malfunction Improper operation of A/C system CKP sensor and teeth of the crankshaft pulley Ignition coil and related wiring harness Spark plug malfunction Improper operation of drive-by-wire control system Inadequate fuel pressure Restriction in fuel line Fuel pump mechanical malfunction Pressure regulator malfunction (built-in fuel pump unit) Fuel leakage from fuel system Check valve malfunction (built-in fuel pump unit) Improper operation of fuel injector EVAP control system malfunction Purge solenoid valve malfunction (stuck open) Restriction in exhaust system CMP sensor and teeth of camshaft pulley EGR valve malfunction Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.9 FAST IDLE/RUNS ON [MZR 1.5]

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 No.1 malfunction Continuous memory DTC is stored Improper load signal input Refrigerant pressure switch malfunction Evaporator temperature sensor malfunction Climate control unit malfunction A/C switch or fan switch malfunction Climate control unit does not determine A/C request or transmit the A/C request signal CPP switch malfunction (MTX) Neutral switch malfunction (MTX) TR switch malfunction (ATX) Air leakage from intake-air system Improper operation of drive-by-wire control system APP sensor malfunction PCM malfunction

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 No.1 malfunction Continuous memory DTC is stored Improper load signal input Refrigerant pressure switch malfunction Evaporator temperature sensor malfunction Climate control unit malfunction A/C switch or fan switch malfunction Climate control unit does not determine A/C request or transmit the A/C request signal CPP switch malfunction (MTX) Neutral switch malfunction (MTX) TR switch malfunction (ATX) Air leakage from intake-air system Improper operation of drive-by-wire control system APP sensor malfunction PCM malfunction

NO.10 LOW IDLE/STALLS DURING DECELERATION [MZR 1.5]

10	LOW IDLE/STALLS DURING DECELERATION
DESCRIPTION	The engine stops unexpectedly at the beginning of deceleration or recovery from deceleration.
POSSIBLE CAUSE	Improper operation of A/C magnetic clutch Vacuum leakage Air leakage from intake-air system Continuous memory DTC is stored Improper operation of drive-by-wire control system EVAP control system malfunction Air leakage from intake-air system Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction VSS or related wiring harness malfunction (ATX) Brake switch or related wiring harness malfunction CPP switch or related wiring harness malfunction (MTX) Neutral switch or related wiring harness malfunction (MTX) TR switch or related wiring harness malfunction (ATX) Improper load signal input Refrigerant pressure switch malfunction Evaporator temperature sensor malfunction Climate control unit malfunction A/C switch or fan switch malfunction Climate control unit does not determine A/C request or transmit the A/C request signal PCM malfunction

LOW IDLE/STALLS DURING DECELERATION

DESCRIPTION

The engine stops unexpectedly at the beginning of deceleration or recovery from deceleration.

POSSIBLE CAUSE

Improper operation of A/C magnetic clutch Vacuum leakage Air leakage from intake-air system Continuous memory DTC is stored Improper operation of drive-by-wire control system EVAP control system malfunction Air leakage from intake-air system Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction VSS or related wiring harness malfunction (ATX) Brake switch or related wiring harness malfunction CPP switch or related wiring harness malfunction (MTX) Neutral switch or related wiring harness malfunction (MTX) TR switch or related wiring harness malfunction (ATX) Improper load signal input Refrigerant pressure switch malfunction Evaporator temperature sensor malfunction Climate control unit malfunction A/C switch or fan switch malfunction Climate control unit does not determine A/C request or transmit the A/C request signal PCM malfunction

NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [MZR 1.5]

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	The engine stops unexpectedly at beginning of acceleration or during acceleration. The engine stops unexpectedly while cruising. The engine speed fluctuates during acceleration or cruising. The engine misses during acceleration or cruising. The 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	Drive-by-wire control system operates with brake override system Air cleaner restriction Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Air leakage from intake-air system Intake-air system restriction Poor installation of EGR valve Improper operation of drive-by-wire control system Vacuum leakage Engine mount installation looseness Continuous memory DTC is stored Engine overheating Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction CKP sensor or related wiring harness malfunction VSS or related wiring harness malfunction CKP sensor and teeth of the crankshaft pulley Spark plug malfunction Fuel leakage from fuel injector Fuel injector clogged Improper operation of drive-by-wire control system Restriction in exhaust system Inadequate or excessive fuel pressure Fuel pump relay or fuel pump circuit malfunction Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel leakage from fuel system Check valve malfunction (built-in fuel pump unit) Improper operation of A/C system Improper operation of air/fuel mixture ratio control Check valve (two-way) malfunction Purge solenoid valve malfunction EVAP control system malfunction CMP sensor and projections of the camshaft pulley malfunction Improper operation of variable valve timing control system Improper operation of EGR control system Low engine compression PCV valve malfunction Clutch malfunction (MTX) ATX malfunction (ATX) Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

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

The engine stops unexpectedly at beginning of acceleration or during acceleration. The engine stops unexpectedly while cruising. The engine speed fluctuates during acceleration or cruising. The engine misses during acceleration or cruising. The 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

Drive-by-wire control system operates with brake override system Air cleaner restriction Electrical connector disconnected Poor fuel quality Fuse malfunction Ignition wiring malfunction Air leakage from intake-air system Intake-air system restriction Poor installation of EGR valve Improper operation of drive-by-wire control system Vacuum leakage Engine mount installation looseness Continuous memory DTC is stored Engine overheating Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction CKP sensor or related wiring harness malfunction VSS or related wiring harness malfunction CKP sensor and teeth of the crankshaft pulley Spark plug malfunction Fuel leakage from fuel injector Fuel injector clogged Improper operation of drive-by-wire control system Restriction in exhaust system Inadequate or excessive fuel pressure Fuel pump relay or fuel pump circuit malfunction Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel leakage from fuel system Check valve malfunction (built-in fuel pump unit) Improper operation of A/C system Improper operation of air/fuel mixture ratio control Check valve (two-way) malfunction Purge solenoid valve malfunction EVAP control system malfunction CMP sensor and projections of the camshaft pulley malfunction Improper operation of variable valve timing control system Improper operation of EGR control system Low engine compression PCV valve malfunction Clutch malfunction (MTX) ATX malfunction (ATX) Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZR 1.5]

12	LACK/LOSS OF POWER-ACCELERATION/CRUISE
DESCRIPTION	Performance is poor under load (such as power down when climbing hills).
POSSIBLE CAUSE	Drive-by-wire control system operates with brake override system Poor fuel quality Air leakage from intake-air system Air cleaner restriction Restriction in intake-air system Vacuum leakage Clutch slippage (MTX) Brake dragging Continuous memory DTC is stored Engine overheating Intake air temperature is too hot Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction IAT sensor or related wiring harness malfunction CKP sensor or related wiring harness malfunction VSS or related wiring harness malfunction (ATX) CKP sensor and teeth of the crankshaft pulley Spark plug malfunction Improper operation of drive-by-wire control system Restriction in exhaust system Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Improper operation of variable tumble control Improper operation of A/C system Purge solenoid valve malfunction EVAP control system malfunction CMP sensor and projections of the camshaft pulley malfunction Improper operation of EGR control system Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Brake dragging Clutch malfunction (MTX) ATX malfunction (ATX) Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

LACK/LOSS OF POWER-ACCELERATION/CRUISE

DESCRIPTION

Performance is poor under load (such as power down when climbing hills).

POSSIBLE CAUSE

Drive-by-wire control system operates with brake override system Poor fuel quality Air leakage from intake-air system Air cleaner restriction Restriction in intake-air system Vacuum leakage Clutch slippage (MTX) Brake dragging Continuous memory DTC is stored Engine overheating Intake air temperature is too hot Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction MAF sensor or related wiring harness malfunction IAT sensor or related wiring harness malfunction CKP sensor or related wiring harness malfunction VSS or related wiring harness malfunction (ATX) CKP sensor and teeth of the crankshaft pulley Spark plug malfunction Improper operation of drive-by-wire control system Restriction in exhaust system Inadequate fuel pressure Fuel pump relay or fuel pump circuit malfunction Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Improper operation of variable tumble control Improper operation of A/C system Purge solenoid valve malfunction EVAP control system malfunction CMP sensor and projections of the camshaft pulley malfunction Improper operation of EGR control system Improper operation of variable valve timing control system Low engine compression PCV valve malfunction Brake dragging Clutch malfunction (MTX) ATX malfunction (ATX) Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE [MZR 1.5]

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 No.1 malfunction Erratic signal to PCM MAF sensor malfunction IAT sensor malfunction KS malfunction CMP sensor malfunction Inadequate engine compression Inadequate fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Improper ignition timing PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

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 No.1 malfunction Erratic signal to PCM MAF sensor malfunction IAT sensor malfunction KS malfunction CMP sensor malfunction Inadequate engine compression Inadequate fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Improper ignition timing PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.14 POOR FUEL ECONOMY [MZR 1.5]

14	POOR FUEL ECONOMY
DESCRIPTION	Fuel economy is unsatisfactory.
POSSIBLE CAUSE	Contaminated air cleaner element Improper ATF level (ATX) Brake dragging Clutch slippage (MTX) Improper coolant level Poor fuel quality Continuous memory DTC is stored Engine cooling system malfunction Spark plug malfunction Inadequate fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel pump unit malfunction Improper operation of variable tumble control Improper operation of variable valve timing control system Restriction in exhaust system Contaminated MAF sensor Improper engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

POOR FUEL ECONOMY

DESCRIPTION

Fuel economy is unsatisfactory.

POSSIBLE CAUSE

Contaminated air cleaner element Improper ATF level (ATX) Brake dragging Clutch slippage (MTX) Improper coolant level Poor fuel quality Continuous memory DTC is stored Engine cooling system malfunction Spark plug malfunction Inadequate fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Fuel pump unit malfunction Improper operation of variable tumble control Improper operation of variable valve timing control system Restriction in exhaust system Contaminated MAF sensor Improper engine compression PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.15 EMISSION COMPLIANCE [MZR 1.5]

15	EMISSION COMPLIANCE
DESCRIPTION	Fails emissions test.
POSSIBLE CAUSE	Electrical connector disconnected Intake-air system clogging or restriction Air cleaner element clogging or restriction Vacuum lines leakage or blockage Continuous memory DTC is stored Cooling system malfunction Fuel-filler cap malfunction Improper operation of air/fuel mixture ratio control Bend or open circuit A/F sensor or HO2S wiring harness Exhaust gas leakage from exhaust system Spark plug malfunction Inadequate fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Charcoal canister damage Fuel tank ventilation system malfunction Restriction in exhaust system TWC malfunction Improper operation of EGR control system PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

EMISSION COMPLIANCE

DESCRIPTION

Fails emissions test.

POSSIBLE CAUSE

Electrical connector disconnected Intake-air system clogging or restriction Air cleaner element clogging or restriction Vacuum lines leakage or blockage Continuous memory DTC is stored Cooling system malfunction Fuel-filler cap malfunction Improper operation of air/fuel mixture ratio control Bend or open circuit A/F sensor or HO2S wiring harness Exhaust gas leakage from exhaust system Spark plug malfunction Inadequate fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Charcoal canister damage Fuel tank ventilation system malfunction Restriction in exhaust system TWC malfunction Improper operation of EGR control system PCV valve malfunction Valve timing malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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 AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.16 HIGH OIL CONSUMPTION/LEAKAGE [MZR 1.5]

16	HIGH OIL CONSUMPTION/LEAKAGE
DESCRIPTION	Oil consumption is excessive.
POSSIBLE CAUSE	External leakage Improper dipstick Improper engine oil viscosity PCV valve malfunction Engine internal parts malfunction PCM malfunction

NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [MZR 1.5]

17	COOLING SYSTEM CONCERNS-OVERHEATING
DESCRIPTION	The engine runs at higher than normal temperature/overheats.
POSSIBLE CAUSE	Radiator hose damage Coolant leakage 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 Continuous memory DTC is stored A/C system operation is improper Excessive A/C system pressure Improper operation of cooling fan control system Drive belt malfunction Leakage around heater unit in passenger compartment Leakage at coolant hoses and/or radiator Thermostat malfunction ECT sensor No.1 malfunction Instrument cluster malfunction PCM malfunction

COOLING SYSTEM CONCERNS-OVERHEATING

DESCRIPTION

The engine runs at higher than normal temperature/overheats.

POSSIBLE CAUSE

Radiator hose damage Coolant leakage 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 Continuous memory DTC is stored A/C system operation is improper Excessive A/C system pressure Improper operation of cooling fan control system Drive belt malfunction Leakage around heater unit in passenger compartment Leakage at coolant hoses and/or radiator Thermostat malfunction ECT sensor No.1 malfunction Instrument cluster malfunction PCM malfunction

NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [MZR 1.5]

18	COOLING SYSTEM CONCERNS-RUNS COLD
DESCRIPTION	The engine does not reach normal operating temperature.
POSSIBLE CAUSE	Cooling fan system malfunction Thermostat malfunction ECT sensor No.1 malfunction PCM malfunction

NO.19 EXHAUST SMOKE [MZR 1.5]

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 Continuous memory DTC is stored Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction ECT sensor No.1 or related wiring harness malfunction MAF sensor or related wiring harness malfunction IAT sensor or related wiring harness malfunction MAP sensor or related wiring harness malfunction A/F sensor or related wiring harness malfunction HO2S sensor or related wiring harness malfunction VSS or related wiring harness malfunction (ATX) Injector fuel leakage Excessive fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Spark plug malfunction CMP sensor malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

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 Continuous memory DTC is stored Erratic signal to PCM APP sensor or related wiring harness malfunction TP sensor or related wiring harness malfunction ECT sensor No.1 or related wiring harness malfunction MAF sensor or related wiring harness malfunction IAT sensor or related wiring harness malfunction MAP sensor or related wiring harness malfunction A/F sensor or related wiring harness malfunction HO2S sensor or related wiring harness malfunction VSS or related wiring harness malfunction (ATX) Injector fuel leakage Excessive fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Spark plug malfunction CMP sensor malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.20 FUEL ODOR (IN ENGINE COMPARTMENT) [MZR 1.5]

20	FUEL ODOR (IN ENGINE COMPARTMENT)
DESCRIPTION	Gasoline fuel smell or visible leakage.
POSSIBLE CAUSE	Excessive fuel pressure Fuel leakage from fuel system Fuel injector malfunction Fuel tank vent system blockage Purge solenoid valve malfunction Continuous memory DTC is stored Charcoal canister malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

FUEL ODOR (IN ENGINE COMPARTMENT)

DESCRIPTION

Gasoline fuel smell or visible leakage.

POSSIBLE CAUSE

Excessive fuel pressure Fuel leakage from fuel system Fuel injector malfunction Fuel tank vent system blockage Purge solenoid valve malfunction Continuous memory DTC is stored Charcoal canister malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.23 A/C DOES NOT WORK SUFFICIENTLY [MZR 1.5]

23 A/C DOES NOT WORK SUFFICIENTLY DESCRIPTION The A/C compressor magnetic clutch does not engage when the A/C is turned on. POSSIBLE CAUSE Improper refrigerant charge amount Open A/C compressor magnetic clutch Open circuit in wiring harness between A/C relay and PCM Open circuit in wiring harness between A/C relay and battery Open circuit in wiring harness between A/C relay and ignition switch Open circuit in wiring harness between A/C relay and A/C magnetic clutch Poor ground of A/C magnetic clutch Improper A/C magnetic clutch clearance Refrigerant pressure switch is stuck open Evaporator temperature sensor 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) A/C relay is stuck open Improper A/C cut-off control PCM malfunction

Scheme 15

Scheme 15: NO.23 A/C DOES NOT WORK SUFFICIENTLY [MZR 1.5]

NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [MZR 1.5]

24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY DESCRIPTION The A/C compressor magnetic clutch does not disengage. POSSIBLE CAUSE A/C compressor magnetic clutch stuck engagement A/C relay is stuck closed Improper A/C compressor magnetic clutch clearance Short to ground in wiring harness between A/C relay terminal E and PCM terminal 1AN A/C relay to magnetic clutch circuit short to battery power Short to ground in wiring harness between climate control unit terminal K and PCM terminal 1AO PCM malfunction

NO.25 A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [MZR 1.5]

25	A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS
DESCRIPTION	The A/C compressor magnetic clutch does not disengage under WOT.
POSSIBLE CAUSE	Continuous memory DTC is stored Erratic signal from APP sensor APP sensor malfunction PCM malfunction

NO.26 EXHAUST SULPHUR SMELL [MZR 1.5]

26	EXHAUST SULPHUR SMELL
DESCRIPTION	Rotten egg smell (sulphur) from exhaust.
POSSIBLE CAUSE	Electrical connector disconnected Poor fuel quality Vacuum leakage Continuous memory DTC is stored Improper fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Charcoal canister malfunction Fuel tank vent system malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

EXHAUST SULPHUR SMELL

DESCRIPTION

Rotten egg smell (sulphur) from exhaust.

POSSIBLE CAUSE

Electrical connector disconnected Poor fuel quality Vacuum leakage Continuous memory DTC is stored Improper fuel pressure Restriction in fuel line Pressure regulator malfunction (built-in fuel pump unit) Fuel pump mechanical malfunction Charcoal canister malfunction Fuel tank vent system malfunction PCM malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.28 FUEL FILLING SHUT OFF CONCERNS [MZR 1.5]

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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .)

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NO.29 SPARK PLUG CONDITION [MZR 1.5]

29	SPARK PLUG CONDITION
DESCRIPTION	Incorrect spark plug condition.
POSSIBLE CAUSE	NOTE: Inspecting the spark plug condition can determine whether problem is related to a specific cylinder 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 Spark plug malfunction Grayish white with specific plug: Air/fuel mixture-Insufficient fuel injection volume Spark plug malfunction Wet/carbon is stuck on all plugs: Spark-Spark weak Air/fuel mixture-Too rich, excessive fuel line pressure Erratic signal to PCM ECT sensor No.1 or related wiring harness malfunction MAF sensor or related wiring harness malfunction A/F sensor or related wiring harness malfunction HO2S sensor or related wiring harness malfunction Compression-Low compression Restriction 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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

SPARK PLUG CONDITION

DESCRIPTION

Incorrect spark plug condition.

POSSIBLE CAUSE

NOTE: Inspecting the spark plug condition can determine whether problem is related to a specific cylinder 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 Spark plug malfunction Grayish white with specific plug: Air/fuel mixture-Insufficient fuel injection volume Spark plug malfunction Wet/carbon is stuck on all plugs: Spark-Spark weak Air/fuel mixture-Too rich, excessive fuel line pressure Erratic signal to PCM ECT sensor No.1 or related wiring harness malfunction MAF sensor or related wiring harness malfunction A/F sensor or related wiring harness malfunction HO2S sensor or related wiring harness malfunction Compression-Low compression Restriction 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 performing the fuel system services: 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. ( AFTER SERVICE PRECAUTION [MZR 1.5] .) CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

NOTE

Inspecting the spark plug condition can determine whether problem is related to a specific cylinder 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 Spark plug malfunction Grayish white with specific plug: Air/fuel mixture-Insufficient fuel injection volume Spark plug malfunction Wet/carbon is stuck on all plugs: Spark-Spark weak Air/fuel mixture-Too rich, excessive fuel line pressure Erratic signal to PCM ECT sensor No.1 or related wiring harness malfunction MAF sensor or related wiring harness malfunction A/F sensor or related wiring harness malfunction HO2S sensor or related wiring harness malfunction Compression-Low compression Restriction in intake/exhaust system Grayish white with all plugs: Air/fuel mixture-Too lean, insufficient fuel line pressure

WARNING

CAUTION
Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to 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.

Water Sprinkling Method

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.

If malfunction occurs only during high humidity or rainy/snowy weather, perform the following steps.

Scheme 16

Connect M-MDS to the DLC-2 if inspecting sensors or switches.
Switch the ignition to ON (engine off). NOTE: If the engine starts and runs, perform the following steps during idle.
Access the PIDs for sensor or switch if 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 the PID value is unstable or malfunction occurs, repair or replace part. see scheme 9: Spraying Water Onto Vehicle And Run Through Car Wash

When idling cannot be continued

Remove the OCV and verify that the spool valve is at maximum retard position. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZR 1.5]»(ref-517441-S25619155382012121200000) .)
If the spool valve is stuck in advance direction, replace the OCV. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZR 1.5]»(ref-517441-S25619155382012121200000) .)
Connect the OCV connector.
Switch the ignition to ON.
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 OCV terminal B and PCM terminal 2W
Inspect the variable valve timing actuator. (See «VARIABLE VALVE TIMING ACTUATOR INSPECTION [MZR 1.5]»(ref-517441-S31102694412012121200000) .)

When idling can be continued

Warm-up the engine.
Connect the M-MDS to the DLC-2.
Idle the engine.
Access the VT Duty1 wt PID. (See «ON-BOARD DIAGNOSTIC TEST [MZR 1.5]»(ref-517437-S32972094912012121200000) .)
Set the OCV duty valve to 100% and verify that the engine idles roughly or stalls. If as specified, inspect the timing belt component (valve timing deviation). If not as specified, go to the next step.
Remove the OCV and connect the OCV connector to the OCV. (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZR 1.5]»(ref-517441-S25619155382012121200000) .)
Switch the ignition to ON.
Access the VT Duty1 wt PID. (See «ON-BOARD DIAGNOSTIC TEST [MZR 1.5]»(ref-517437-S32972094912012121200000) .)
Set the OCV duty value to 100% and verify that the spool valve operates in the advance direction.
If not as specified, inspect the following: OCV operation (See «OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZR 1.5]»(ref-517441-S25619155382012121200000) .) Wiring harness and connectors between OCV terminal A and PCM terminal 2I for open or short circuit Wiring harness and connectors between OCV terminal B and PCM terminal 2W for open or short circuit
Inspect the following hydraulic passages for restriction and/or leakage: Oil pressure switch-OCV OCV-camshaft Camshaft internal passage
If they are normal, replace the intake camshaft pulley (with a built-in variable valve timing actuator). (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 1.5]»(ref-517447-S10648211572012121200000) .)

Symptom Troubleshooting - Engine Controls [Mzr 1.5]: Other Mazda 2 II рестайлинг

NO.1 MELTING OF MAIN OR OTHER FUSES [MZR 1.5]

Scheme 14

NO.2 MIL ILLUMINATES [MZR 1.5]

NO.3 WILL NOT CRANK [MZR 1.5]

NO.4 HARD TO START/LONG CRANK/ERRATIC START/ERRATIC CRANK [MZR 1.5]

NO.5 ENGINE STALLS-AFTER START/AT IDLE [MZR 1.5]

NO.6 CRANKS NORMALLY BUT WILL NOT START [MZR 1.5]

NO.7 SLOW RETURN TO IDLE [MZR 1.5]

NO.8 ENGINE RUNS ROUGH/ROLLING IDLE [MZR 1.5]

NO.9 FAST IDLE/RUNS ON [MZR 1.5]

NO.10 LOW IDLE/STALLS DURING DECELERATION [MZR 1.5]

NO.11 ENGINE STALLS/QUITS, ENGINE RUNS ROUGH, MISSES, BUCK/JERK, HESITATION/STUMBLE, SURGES [MZR 1.5]

NO.12 LACK/LOSS OF POWER-ACCELERATION/CRUISE [MZR 1.5]

NO.13 KNOCKING/PINGING-ACCELERATION/CRUISE [MZR 1.5]

NO.14 POOR FUEL ECONOMY [MZR 1.5]

NO.15 EMISSION COMPLIANCE [MZR 1.5]

NO.16 HIGH OIL CONSUMPTION/LEAKAGE [MZR 1.5]

NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [MZR 1.5]

NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [MZR 1.5]

NO.19 EXHAUST SMOKE [MZR 1.5]

NO.20 FUEL ODOR (IN ENGINE COMPARTMENT) [MZR 1.5]

NO.23 A/C DOES NOT WORK SUFFICIENTLY [MZR 1.5]

Scheme 15

NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [MZR 1.5]

NO.25 A/C IS NOT CUT OFF UNDER WIDE OPEN THROTTLE CONDITIONS [MZR 1.5]

NO.26 EXHAUST SULPHUR SMELL [MZR 1.5]

NO.28 FUEL FILLING SHUT OFF CONCERNS [MZR 1.5]

NO.29 SPARK PLUG CONDITION [MZR 1.5]

Water Sprinkling Method

Scheme 16

When idling cannot be continued

When idling can be continued

More articles — Symptom Troubleshooting - Engine Controls [Mzr 1.5]

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