Toyota Tacoma manuals

Toyota Corolla Repair Manual: Circuit description

Hint

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A direct ignition system (dis) is used on this vehicle. The dis improves the ignition timing accuracy, reduces highvoltage loss, and enhances the overall reliability of the ignition system by eliminating the distributor.

The dis is a 1cylinder ignition system which ignites one cylinder with one ignition coil. In the 1cylinder ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the center electrode to the ground electrode.

The ecm determines the ignition timing and outputs the ignition signals (igt) for each cylinder. Using the ignition (igt) signal, the ecm turns on and off the power transistor inside the igniter and this switches on and off the current to the primary coil. When the current flow to the primary coil is cut off, highvoltage is generated in the secondary coil and this voltage is applied to the spark plugs to spark inside the cylinders.

As the ecm cuts the current to the primary coil, the igniter sends back the ignition confirmation (igf) signal for each cylinder ignition to the ecm.

Monitor description

Monitor description

If the ecm does not receive the ignition confirmation signal (igf) after

If the ecm does not receive the ignition confirmation signal (igf) after sending the ignition signal (igt), it interprets this as a fault in the igniter and sets a dtc.

Monitor strategy

Typical enabling conditions

Typical enabling conditions

Typical malfunction thresholds

Typical malfunction thresholds

Component operating range

Component operating range

Wiring diagram

Wiring diagram

Inspection procedure

Ignition coil  primary/secondary circuit
Dtc p0351 ignition coil a primary/secondary circu Dtc p0352 ignition coil b primary/secondary circuit Dtc p0353 ignition coil c primary/secondary circuit Dtc p0354 ignition coil d primar ...

Inspection procedure
Hint: read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, it is usefu ...

Other materials:

Inspection procedure
Hint: perform the troubleshooting of dtc p0335 first. If no trouble is found, troubleshoot the engine mechanical systems. Read freeze frame data using the hand-held tester or the obd ii scan tool. Freeze frame data records the engine conditions when a malfunction is detected. When tr ...

Receiving a call
When a call is received, the following screen is displayed together with a sound. To answer the phone Press the switch on the steering wheel or select . To refuse a call Press the switch on the steering wheel or select . To adjust the incoming call volume Turn the PWR/VOL knob. You ...

Circuit description
The shift solenoid valve sl is turned on and off by signals from the ecm in order to control the hydraulic pressure operation, the lockup relay valve, which then the controls operation of the lockup clutch. Fail safe function: if the ecm detects a malfunction, it turns the shift solen ...

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