Feedback management system Honda Accord 3

Checking the frequency solenoid valve C
The frequency solenoid valve C is activated when the engine speed is above 730 rpm or the engine speed is below 730 rpm and the coolant temperature is above 60°C. It controls the vacuum for the throttle valve. With the...

Checking the solenoid valve for increasing the idle stroke
The idle speed increase solenoid is activated when the transmission is in gear or the engine is cold. It creates a vacuum for the internal diaphragm of the idle speed increase controller to increase rpm when engine load...

Checking the functionality of the air conditioning idle speed increase solenoid valve
When the air conditioning compressor starts to operate, the valve is activated, applying vacuum to the outer diaphragm of the idle speed controller, which increases the idle speed. Disconnect the lower solenoid vacuum...

Checking the functionality of the electromagnetic valve for cutting off the primary idle mixture
The valve is used to block the flow of idle mixture from the fuel-air channel to the bypass channel in order to prevent the engine from running when the ignition is off. The electromagnetic valve also serves to block...

Checking the functionality of the leakage solenoid valve at startup
The valve serves to relieve the vacuum from the throttle valve opener during starter operation. Disconnect vacuum hose 26 from the vacuum manifold. Connect the vacuum pump and create a vacuum. Turn the ignition key to...

Checking the performance of the electromagnetic frequency valve A
The frequency electromagnetic valve A, being part of the M-system, receives signals from the oxygen content sensor via the control unit and opens the air control valve A at the moment when the air-fuel mixture becomes...

Checking the performance of the electromagnetic valve frequency B
The frequency solenoid valve B, being part of the X-system, receives signals from the control unit and opens the air control valve B at the time when the air-fuel mixture becomes over-rich. Disconnect the lower vacuum...

Checking the functionality of the feedback control solenoid valve
The feedback control system serves to ensure a stoichiometric (ideal) proportion in the air-fuel mixture, which allows for a significant improvement in the operation of the three-way catalytic converter to reduce...

Checking the performance of the electromagnetic air suction control valve
When the electromagnetic air intake control valve is activated, the vacuum in the manifold causes the diaphragm in the air intake valve to rise. This forces clean air from the air cleaner into the exhaust manifold...

Checking the functionality of the control electromagnetic valve of the afterburner
The afterburner control solenoid valve controls the afterburner valve by applying vacuum to a diaphragm that holds it closed. The afterburner valve senses changes in the intake manifold vacuum during gear shifting or...

Checking the functionality of the air leak solenoid valve
The air leak solenoid valve supplies additional air to the air intake manifold. The solenoid valve opens when the engine is idling and when the inlet air temperature is high. The solenoid valve serves to reduce exhaust...

Checking the functionality of the EFE (Electro Fuel Evaporator) system
To improve the engine performance during warm-up, a heater is built into the carburetor insulator in the primary opening. The maximum temperature of the heater is regulated by changing the electrical resistance of the...

Checking the functionality of the EFE system control module
Disconnect the 7-pin connector from the EFE control module. Check for electrical continuity between the Black terminal and ground on the main wiring harness. If there is no electrical connection, then the break in the...

Checking the power supply (IG1) and ground
Check for electrical continuity between ground and Black terminal 32. If there is no electrical connection, then the break in the Black wire between point G2 and terminal 32 of the control unit should be repaired. If...

Checking the power supply (Bat)
Turn off the ignition. Measure the voltage between Yellow/Blue (+) 22 and Black (-) 32 pins. If there is battery voltage, then the Bat power source is normal. If there is no voltage, then you should check fuse No.1 (10...

Checking the starter signal
This signal is sent to the control unit during starter operation. Measure the voltage between terminals 30 (Blue/Red (+)) and 32 (Black (-)) with the ignition switch in the START position. If there is battery voltage,...

Checking the performance of the oxygen sensor
The oxygen sensor detects the oxygen content in the exhaust gases and sends signals to the control unit. Warm up the engine to operating temperature until the cooling fan comes on. Measure the voltage between pins 31...

Checking the performance of the TA sensor
The intake air temperature sensor (IATS) is a thermistor (a resistor whose resistance depends on temperature). The thermistor's resistance decreases as the incoming air temperature increases, as shown in the figure....

Checking the functionality of the TW sensor
The coolant temperature (TW) sensor is a thermistor (a resistor whose resistance depends on temperature). The thermistor's resistance decreases as the coolant temperature increases, as shown in the figure. Warm up the...

Checking the ignition coil signal
This signal allows the control unit to monitor the engine speed. Turn on the ignition. Measure the voltage between pins 11 (Blue (+)) and 32 (Black (-)). If there is battery voltage, then the ignition coil signal is...

Checking the performance of the pulse speed generator
The signal generated by the speed pulse generator consists of 4 pulses corresponding to each revolution of the speedometer cable. Block the rear wheels and apply the parking brake. Jack up the front of the car and...

Checking the functionality of the vacuum switch A
Vacuum switch A sends signals to the control unit when the vacuum falls below 80 mmHg. Disconnect vacuum hose #2 from the vacuum manifold and connect a vacuum pump to the hose. Turn on the ignition. Measure the voltage...

Checking the functionality of the vacuum switch C
Vacuum switch C sends signals to the control unit when the vacuum falls below 60 mmHg. Disconnect vacuum hose #7 from the vacuum manifold and connect a vacuum pump to the hose. Turn on the ignition. Measure the voltage...

Checking the functionality of the vacuum switch B
Vacuum switch B sends signals to the control unit when the vacuum falls below 30 mmHg. Disconnect vacuum hose #7 from the vacuum manifold and connect a vacuum pump to the hose. Turn on the ignition. Measure the voltage...

Checking the functionality of the clutch switch signal
Turn on the ignition. Measure the voltage between pins 16 (Pink (+)) and 32 (Black (-)). If the voltage is less than 3 V, then see point A), if not - point B). A) Press the clutch pedal. Measure the voltage between pins...

Checking the automatic transmission gear position signal
This signal is sent to the control unit when the gearbox is in neutral or PARK position. Turn on the ignition. While watching the automatic transmission gear indicator, shift the gear selector through all positions. If...

Checking the air conditioner switch signal
This signal is sent to the control unit when there is a need for the air conditioner electrical circuits (air conditioner switch). Start the engine. Turn on the compressor. Turn on the air conditioner (air conditioner...

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