Electronic fuel injection system PGM-FI Honda Accord 3

Air intake device
The electronic fuel injection system consists of three units: air intake, electronic control, fuel supply. This device supplies air to all engine components. It consists of an air filter, an air intake pipe, a throttle...

Electronic control system
Control system To ensure that fuel is supplied to the engine cylinders at the right time and in the right amount, the control system for this process must be able to perform a number of individual functions. The brain...

Fuel system
Fuel pump Fuel enters the pump through the fuel filter, flows around the anchor through the one-way valve and enters the engine compartment. A muffler is used to dampen pulsations in the fuel flow. The pump has a safety...

Diagnostics and performance testing
Self-diagnostic indicators The Brief Index or Diagnostic Chart covers the most common faults in the electronic fuel injection system. The causes of faults are listed in order of difficulty of checking and correcting...

Additional information about the ECU device
After carrying out repair work, disconnect the negative battery cable for at least 10 seconds, or remove the ECU power supply fuse. This is necessary to erase the ECU memory. When disconnecting the battery cable, the...

Oxygen sensor — check
Accord 1985-86 and Prelude 1986-89 1. Remove the oxygen sensor connector. 2. Start the engine and warm it up without load at 3000 rpm, then increase the speed to 4000 rpm and release the throttle pedal sharply. Repeat...

Manifold Air Pressure Sensor (MAP sensor)
Accord 1985-86 1. Disconnect the vacuum hose between the MAP sensor and the throttle body from the throttle body and plug the hose hole in the throttle body. Connect a hand pump to the open end of the vacuum hose. 2....

Atmospheric pressure sensor (PA sensor)
Accord 1985-88 1. Disconnect the connector from the control unit. Connect the cable test system (07999-PD6000A or equivalent) between the control unit and the cable connector. 2. Turn on the ignition. Connect the...

Idle Air Ratio Control Sensor (IMA Sensor)
Accord 1985 1. Open the cover of control box No.1 and remove the mounting rivets of the IMA sensor. 2. Disconnect the IMA sensor and the ZR connector. 3. Turn the knob and measure the resistance between the brown and...

Intake air temperature sensor (TA sensor) and coolant temperature sensor (TW sensor)
Accord 1985 1. Remove the connector and remove the TA/TW sensor from the cylinder head intake manifold. 2. To check the sensor, place it in cold water and slowly heat the water. Measure the resistance at the terminals....

Intake Air Temperature Sensor (TA-sensor)
Accord 1986 and Prelude 1986-89 1. Disconnect the connector and remove the sensor from the intake manifold. 2. To check the sensor, place it in cold water, slowly heating it. Measure the resistance between the...

Coolant Temperature Sensor (TW-Sensor)
Accord 1986 and Prelude 1986-89 1. Disconnect the connector and remove the TW sensor from the thermostat housing. 2. To check the sensor, place it in cold water, slowly heating it. Measure the resistance between the...

Crankshaft Angle Sensor (CYL Sensor)
Accord 1985-86 and Prelude 1986-89 If the CYL sensor or TDC sensor test result is bad, replace them as a unit. 1. Disconnect the connector from the crankshaft angle sensor. 2. Measure the resistance between the sensor...

Crankshaft Rotation Angle Sensor (TDC Sensor)
If the CYL and TDC sensor test results are bad, replace them as a unit. 1. Disconnect the connector from the crankshaft angle sensor. 2. Measure the resistance between the (orange/blue and white/blue on 1986 ACCORD and...

Throttle angle sensor
Do not adjust the throttle stop screw. It is set at the factory. 1. Disconnect the throttle angle sensor connector. Accord 1985 2. Measure the resistance between the yellow and green terminals of the sensor. The...

Idle speed control solenoid valve
Accord 1985-86 The idle air control solenoid is actuated by the on-board computer. When the solenoid opens, it allows vacuum to flow into the hose (#26 on 1985 models and the upper hose on 1986 models) and increases the...

Checking the idle control
Accord 1987-89 1. Check the vacuum line for incorrect connections, kinks, blockages or accidental disconnections. 2. Disconnect the lower vacuum hose from the idle air control solenoid valve to the air chamber, connect...

Check No. 1 of the electromagnetic control valve of the idle air control
Accord 1987-89 1. Start the engine at idle speed. 2. Disconnect the upper hose from the idle air control solenoid valve from the intake manifold and check the vacuum. There should be vacuum. 3. If there is no vacuum,...

Check No. 2 of the electromagnetic control valve of the idle speed
Accord 1987-89 1. Start the engine. 2. Disconnect the two-pin connector from the idle air control solenoid valve. 3. Connect the positive probe of the voltmeter to the black and yellow terminal and the negative probe to...

Idle Speed Increase Solenoid Control Valve
Accord 1985 The idle air control solenoid valve opens when the coolant temperature is below 15°C. If the coolant temperature is below IAC, it is initiated only when the atmospheric pressure is 660 mmHg or less. In any...

Automatic transmission idle speed control solenoid valve
Accord 1985 The automatic transmission control solenoid valve is activated when the automatic transmission lever is in the D4, D3,2 and R positions. In this case, the solenoid valve opens, allowing vacuum into the...

Air conditioning idle control solenoid valve
Accord 1985 The air conditioning idle control solenoid valve is initiated when the air conditioner is turned on. When the solenoid valve opens, vacuum is applied to hose #19 between the solenoid valve and the idle...

Fast idle valve
Accord 1985-89 and Prelude 1986-89 The fast idle valve is adjusted at the factory and should not be adjusted. Check the positive crankcase ventilation pipes for kinks, disconnections, blockages, etc. Check the tightness...

Air damper
Accord 1985-89 and Prelude 1986-89 1. With the engine off, slowly open the throttle until the damper rod rises to the stop. 2. Release the throttle valve and time the time until the throttle valve does not touch the...

Fuel injection check
Accord 1985-89 and Prelude 1986-89 Check the following system components before checking the idle speed: ignition timing, valve clearance, and CO content in the exhaust at idle. 1. If the engine is running, disconnect...

Fuel system resistor
Accord 1985-89 and Prelude 1986-89 1. Disconnect the resistor connector. 2. Check the resistance between each terminal of resistors E, D, C and B and electrical contact A. The resistance should be 5-7 ohms. 3. If the...

Checking the main relay
Accord 1985-89 and Prelude 1986-89 1. Remove the main relay located near the fuse box under the dashboard. 2. Connect the positive battery terminal to terminal 4 and the negative battery terminal to terminal 8 of the...

Checking the wiring harnesses
Accord 1985 1. Leave the ignition off. 2. Disconnect the main relay connector. 3. Connect the positive probe of the tester to the yellow-blue wire in the connector and to the ground wire - the negative probe of the...

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