Back-up Function
The back-up function switches over to fixed signal control by the back-up IC to permit driving in cases when a malfunction occurs in the microcomputer inside the engine ECU. The back-up Read more Fail-safe and Back-up Function 2 of 2
Gasoline Engine Control System
Fail-safe and Back-up Function 1 of 2
Fail-safe Function
Purpose of the fail-safe function
If the ECU detects a malfunction in any of the input signal systems, the fail-safe function controls the engine using standard values contained in Read more Fail-safe and Back-up Function 1 of 2
DTC (Diagnostic Trouble Codes) DTC Output
DTCs are output as either 5-digit or 2-digit codes. In the Repair Manual, the detection item, detecting condition and trouble area are included for each DTC, so refer to the Repair Manual when troubleshooting.
1. Read more DTC (Diagnostic Trouble Codes) DTC Output
Gasoline Engine Control System Diagnosis
The engine ECU possesses an OBD (On-Board Diagnostic) function which constantly monitors each sensor and actuator. If it detects a malfunction, the malfunction is recorded as a DTC (Diagnostic Trouble Read more Gasoline Engine Control System Diagnosis
Gasoline Engine Air Intake Control System
The air intake control system is divided into two air cleaner inlets, and one of these inlets is provided with a valve, which is opened and closed to attain suitable air intake efficiency in accordance Read more Gasoline Engine Air Intake Control System
Evaporative Emission Control System
The evaporative emission control system prevents evaporated fuel from the fuel tank from being released into the atmosphere by having the evaporative emissions be temporarily absorbed by a charcoal canister. Read more Evaporative Emission Control System
AI (Air Injection) Control System/AS (Air Suction) Control System
The AI control system/AS control system is a system that feeds air into the exhaust manifold to recombust the uncombusted gas in the exhaust to lower HC and CO emissions. The difference between these two Read more AI (Air Injection) Control System/AS (Air Suction) Control System
ACIS (Acoustic Control Induction System)
The ACIS (Acoustic Control Induction System) changes the effective length of the intake manifold to increase power over a wide range from low speed to high speed. This system uses an intake air control Read more ACIS (Acoustic Control Induction System)
Oxygen Sensor/Air Fuel Ratio Sensor Heater Control System
The detection capability of the oxygen sensor and A/F (air-fuel) ratio sensor decline at low temperatures (under 400
VVTL-i (Variable Valve Timing and Lift-intelligent)
The VVTL-i system is based on the VVT-i system and employs a cam changeover mechanism to change the amount of the intake and exhaust valve lift. This makes it possible to attain high power without affecting Read more VVTL-i (Variable Valve Timing and Lift-intelligent)