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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSVOLKSWAGEN1991GTI L4-1984CC 2.0L DOHC (9A)REPAIR AND DIAGNOSISRELAYS AND MODULESRELAYS AND MODULES - POWERTRAIN MANAGEMENTRELAYS AND MODULES - COMPUTERS AND CONTROL SYSTEMSELECTRONIC SPARK CONTROL MODULETESTING AND INSPECTION
1991 Volkswagen GTI L4-1984cc 2.0L DOHC (9A)
Electronic Spark Control Module: Testing and Inspection
1991 Volkswagen GTI L4-1984cc 2.0L DOHC (9A)SECTION Testing and Inspection
Power Stage Location:
1. Disconnect the high tension lead (terminal 4) at the ignition coil and connect it to ground with a jumper wire.
Ignition System Testing:
2. Remove the harness connector at the power stage.
3. Connect an LED test light between terminals 2 and 3 of the harness connector.
4. With the ignition switch crank the engine.
^ The test light should flicker.
If the test light does not flicker, the Hall sender, the CIS-E control unit, or the wiring may be defective. Refer to HALL SENDER and SYSTEM ELECTRICAL TEST.
If the test light does flicker continue.
5. With the ignition "OFF", reconnect the power stage harness connector.
Power Stage Testing:
6. Connect a suitable volt/ohm meter between terminal 1 and 15 of the ignition coil.
Ignition System Testing:
7. Disconnect the Hall Sender harness connector and turn the ignition "ON".
8. With a jumper briefly ground the center terminal of the Hall Sender harness connector.
^ The voltage at the ignition coil should briefly rise to a least 2 volts, then drop to zero volts.
If the correct results are not obtained replace the ignition power stage.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.