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.
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HOMESERVICE MANUALSTOYOTA1991SUPRA L6-3.0L DOHC TURBO (7M-GTE)REPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTIGNITION SYSTEMRELAYS AND MODULES - IGNITION SYSTEMIGNITION CONTROL MODULEDESCRIPTION AND OPERATION
1991 Toyota Supra L6-3.0L DOHC Turbo (7M-GTE)
Ignition Control Module: Description and Operation
1991 Toyota Supra L6-3.0L DOHC Turbo (7M-GTE)SECTION Description and Operation
Ignition System:
PURPOSE
The igniter physically fire the ignition coil in response to the ECM signal. Computers generally produce low amperage signals as outputs, much lower than necessary to fire the coil.
LOCATION
Mounted on left strut tower.
CONSTRUCTION
The igniter consists of a power transistor and circuitry to provide a tachometer output.
OPERATION
The igniter is essentially an electronic relay. It receives a "trigger" from the ECM and responds by turning a higher amperage current to the ignition coil on and off. Each time a spark is produced an ignition confirmation (IGF) signal is sent to the ECM.
RENDER: 1.0x
NO RELATED
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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.