Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Computerized Engine Control - Digital Timing Control: Description
A Bosch-Hitachi digital timing control system, called Hartig Electronic Ignition, provides timing functions. There is neither a centrifugal advance nor a vacuum advance/retard mechanism.
Instead, the system uses a Bosch Hall Effect distributor and ignition coil and a Hitachi fuel/timing control unit. Engine operating conditions are monitored by various sensors.
A single control unit is used to control the operation of both the ignition system and the oxygen sensor system. However, a second control unit is used to turn the ignition coil on and off.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.