Honda Civic, del Sol Repair Manual 1992-1995

FUEL DELIVERY SYSTEM

The fuel delivery system consists of these components: The fuel pump, the pressure regulator, the fuel injectors, the injector resistor and the main relay.

The pump is an in-line, direct drive type. Fuel is drawn through a filter into the pump, flows past the armature through the one-way valve, passes through another filter and is delivered to the injectors.

A relief valve prevents excessive pressure build-up by opening in the event of a blockage in the discharge side and allowing fuel to flow from the high to the low pressure side.

The pressure regulator maintains a constant fuel pressure to the injectors. Excess fuel is routed back to the fuel tank through the return line.

The injectors are solenoid-actuated, constant stroke, pintle types consisting of a solenoid, plunger, needle valve and housing. When current is applied to the solenoid coil, the needle valve raises and pressurized fuel fills the injector housing and squirts out the nozzle.

The injection quantity is determined by the length of time the valve is open (the length of time during which current is supplied to the solenoid coils).

Because it determines opening and closing intervals-which in turn determines the air-fuel mixture ratio-injector timing must be quite accurate. To attain the best possible injector response, the current rise time, when voltage is being applied to each injector coil must be as short as possible.

The number of windings in the coil has therefore been reduced to lower the inductance in the coil. However, this creates low coil resistance, which could compromise the durability of the coil. The flow of current in the coil is therefore restricted by a resistor installed in the injector wire harness.

The main relay, which is installed adjacent to the fuse box, is a direct coupler type which contains the relays for the Engine Control Module power supply and the fuel pump power supply.

INTERLOCK SYSTEM | DESCRIPTION, CHECK AND SOLENOID REPLACEMENT AND ADJUSTMENT

DESCRIPTION

1. Vehicles equipped with an automatic transaxle have an interlock system to prevent unintentional shifting. The interlock system consists of two subsystems: a shift lock system and a key interlock system.


KEY INTERLOCK SYSTEM


2. The key interlock system prevents the ignition key from being removed from the ignition switch unless the shift lever is in the Park position.
   
   If you insert the key when the shift lever is in any position other than Park, a solenoid is activated, making it impossible for you to remove the key until the shift lever is moved to the Park position.


SHIFT LOCK SYSTEM


3. The shift lock system prevents the shift lever from moving from the Park position into the Reverse or Drive positions unless the brake pedal is depressed. Nor can the shift lever be shifted when the brake pedal and the accelerator pedal are depressed at the same time.
   
   In the event of a system malfunction, you can release the shift lever by inserting a key into the release slot near the shift lever.


CHECK


4. The following checks are simple tests of the key interlock solenoid and the shift lock solenoid you can do at home. Further testing of the interlock system should be left to a dealer service department.

• Introduction: Vehicle identification numbers; Buying parts; Maintenance techniques, and more.
• Tune-up and routine maintenance
• Engine and overhaul procedures
• Cooling, heating and air-conditioning systems
• Fuel and exhaust systems
• Engine electrical systems
• Emissions control systems
• Transmission
• Brakes
• Suspension and steering systems
• Body
• Chassis electrical system
• Wiring diagrams