Description
Hint:
A direct ignition system (dis) is used on this vehicle.
The dis is a 1-cylinder ignition system in which each cylinder is ignited by one ignition coil and one spark plug is connected to the end of each secondary wiring. A powerful voltage, generated in the secondary wiring, is applied directly to each spark plug. The sparks of the spark plugs pass from the center electrode to the ground electrodes.
The ecm determines the ignition timing and transmits the ignition (igt) signals to each cylinder. Using the igt signal, the ecm turns the power transistor inside the igniter on and off. The power transistor, in turn, switches on and off the current to the primary coil. When the current to the primary coil is cut off, a powerful voltage is generated in the secondary coil. This voltage is applied to the spark plugs, causing them to spark inside the cylinders. As the ecm cuts the current to the primary coil, the igniter sends back an ignition confirmation (igf) signal to the ecm, for each cylinder ignition.
Reference: inspection using an oscilloscope.
While cranking or idling the engine, check the waveform between terminals igt (1 to 4) and e1, and igf1 and e1 of the ecm connector.
Monitor description
If the ecm does not receive any igf signals despite transmitting the igt signal, it interprets this as a fault in the igniter and sets a dtc.
If the malfunction is not repaired successfully, a dtc is set 1 second after the engine is next started.
Monitor strategy
Typical enabling conditions
Typical malfunction thresholds
Component operating range
Wiring diagram
Inspection procedure
Hint:
Read freeze frame data using the intelligent tester. Freeze frame data records the engine condition when malfunctions are detected. When troubleshooting, freeze frame data can help determine if the vehicle was moving or stationary, if the engine was warmed up or not, if the air-fuel ratio was lean or rich, and other data from the time the malfunction occurred.
Standard resistance (check for open)
Standard voltage
Standard
resistance (check for open)
Standard resistance (check for open)
Standard resistance (check for short)
Standard resistance (check for short)
Notice:
Do not shuffle the connectors.
Ecu malfunction
Description
Inspection procedure
If the power steering ecu detects these dtcs, it will shut off the motor
relay circuit (built into the power
steering ecu) and stop power assist. However, power assist continues if dtc
c1533 is output.
Reconfirm dtc
Check for dtc.
Ok:
dtc i ...
Exhaust gas precautions
Harmful substance to the human body is included in exhaust
gases if inhale.
Caution
Exhaust gases include harmful carbon monoxide (co), which is colorless and
odorless. Observe the following precautions.
Failure to do so may cause exhaust gases enter the vehicle and may lead to
an accident c ...
Exhaust pipe
Installation
Install front exhaust pipe assembly
Using a vernier caliper, measure the free length of
the compression spring.
Minimum length:
41.5 Mm (1.634 In.)
If the length is less than the minimum, replace the
compression spring.
Install a new gasket by hand so that its ...