ENGINE FEATURES [ZY, Z6]

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On-board Diagnostic

To meet the EOBD regulations

•  Diagnostic test modes adopted

Improved serviceability

•  DTCs adopted

•  KOEO/KOER self test function adopted

•  PID/DATA monitor function adopted

•  Active command modes function adopted

Mechanical

Improved engine performance

•  A variable valve timing mechanism has been adopted.

Reduced engine weight

•  The shimless tappet has been adopted.

•  Main parts (cylinder head and cylinder block) are made of aluminum alloy.

Reduced engine noise and vibration

•  The cylinder head is made of aluminum alloy.

•  A silent timing chain has been adopted.

•  A highly rigid aluminum cylinder block and lower cylinder block have been adopted.

•  A crankshaft pulley with torsional damper has been adopted.

•  A pendulum type engine mount has been adopted.

Improved serviceability

•  A serpentine type drive belt has been adopted.

•  Drive belt tension is adjusted automatically with an auto-tensioner.

•  A timing chain has been adopted to eliminate the need for its replacement.

•  An engine front cover with a service hole has been adopted. (for unlocking the chain adjust ratchet and securing the tensioner arm.)

Lubrication

Reduced weight

•  Aluminum alloy oil pump cover adopted

•  Plastic oil strainer adopted

Improved lubricity

•  Trochoid gear type oil pump adopted

•  Oil jet valves adopted

•  Water-cooled type oil cooler adopted (if equipped)

Cooling System

Improved reliability

•  Degassing type coolant reserve tank adopted

Reduced weight

•  Cross-flow type radiator with aluminum core and plastic tank adopted

•  Stainless steel thermostat and plastic thermostat cover adopted

Miniaturization

•  Built-in type water pump adopted

Reduced engine noise and vibration

•  Electric cooling fans adopted

Improved serviceability

•  Longer-life engine coolant (type FL22) adopted

Intake-air System

Improved engine torque and output

•  Variable intake air system adopted

Improved emission performance

•  Variable tumble system adopted

Improved noise reduction

•  Resonance chamber adopted

Fuel System

Improved serviceability

• Nylon tubes adopted for fuel hoses in the engine compartment and around the fuel tank, and quick release connectors adopted for joints

Reduction of evaporative gas

• Returnless fuel system adopted

Emission System

Improved exhaust gas purification

• Catalytic converter system adopted

• Exhaust gas recirculation (EGR) system adopted (Vehicles with EGR system)

Charging System

Miniaturization

• Non-regulator type generator with built-in power transistor adopted

Reduced operation noise

• Generator with two delta connection type stator coils adopted (ZY, Z6 (European (L.H.D. U.K.) specs. (except for Israel)))

Ignition System

Improved reliability

• Independent ignition control system with distributorless ignition coils adopted

Improved durability

• Spark plugs with an iridium alloy center electrode and platinum tip ground electrode adopted (ZY, Z6 (European (L.H.D. U.K.) specs. (except for Russia and Israel.)))

Starting System

Improved startability

• Reduction type starter adopted

Improved safety

• Starter interlock switch adopted (if equipped)

Control System

Improved driving performance

•  Variable valve timing control adopted

Wiring harness simplification

•  Controller area network (CAN) adopted

Improved theft deterrence

•  Starter cut-off control adopted

To meet the EOBD regulations	• Diagnostic test modes adopted
Improved serviceability	• DTCs adopted • KOEO/KOER self test function adopted • PID/DATA monitor function adopted • Active command modes function adopted

Improved engine performance	• A variable valve timing mechanism has been adopted.
Reduced engine weight	• The shimless tappet has been adopted. • Main parts (cylinder head and cylinder block) are made of aluminum alloy.
Reduced engine noise and vibration	• The cylinder head is made of aluminum alloy. • A silent timing chain has been adopted. • A highly rigid aluminum cylinder block and lower cylinder block have been adopted. • A crankshaft pulley with torsional damper has been adopted. • A pendulum type engine mount has been adopted.
Improved serviceability	• A serpentine type drive belt has been adopted. • Drive belt tension is adjusted automatically with an auto-tensioner. • A timing chain has been adopted to eliminate the need for its replacement. • An engine front cover with a service hole has been adopted. (for unlocking the chain adjust ratchet and securing the tensioner arm.)

Reduced weight	• Aluminum alloy oil pump cover adopted • Plastic oil strainer adopted
Improved lubricity	• Trochoid gear type oil pump adopted • Oil jet valves adopted • Water-cooled type oil cooler adopted (if equipped)

Improved reliability	• Degassing type coolant reserve tank adopted
Reduced weight	• Cross-flow type radiator with aluminum core and plastic tank adopted • Stainless steel thermostat and plastic thermostat cover adopted
Miniaturization	• Built-in type water pump adopted
Reduced engine noise and vibration	• Electric cooling fans adopted
Improved serviceability	• Longer-life engine coolant (type FL22) adopted

Improved engine torque and output	• Variable intake air system adopted
Improved emission performance	• Variable tumble system adopted
Improved noise reduction	• Resonance chamber adopted

Improved serviceability	• Nylon tubes adopted for fuel hoses in the engine compartment and around the fuel tank, and quick release connectors adopted for joints
Reduction of evaporative gas	• Returnless fuel system adopted

Miniaturization	• Non-regulator type generator with built-in power transistor adopted
Reduced operation noise	• Generator with two delta connection type stator coils adopted (ZY, Z6 (European (L.H.D. U.K.) specs. (except for Israel)))

Improved reliability	• Independent ignition control system with distributorless ignition coils adopted
Improved durability	• Spark plugs with an iridium alloy center electrode and platinum tip ground electrode adopted (ZY, Z6 (European (L.H.D. U.K.) specs. (except for Russia and Israel.)))

Improved startability	• Reduction type starter adopted
Improved safety	• Starter interlock switch adopted (if equipped)

Improved driving performance	• Variable valve timing control adopted
Wiring harness simplification	• Controller area network (CAN) adopted
Improved theft deterrence	• Starter cut-off control adopted