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 MANUALSRENAULT198518I/SPORTWAGON L4-2165CC 2.2LREPAIR AND DIAGNOSISTRANSMISSION AND DRIVETRAINRELAYS AND MODULES - TRANSMISSION AND DRIVETRAINRELAYS AND MODULES - A/TCONTROL MODULETESTING AND INSPECTION
1985 Renault 18I/Sportwagon L4-2165cc 2.2L
Control Module: Testing and Inspection
1985 Renault 18I/Sportwagon L4-2165cc 2.2LSECTION Testing and Inspection
The following procedures can be performed using standard shop equipment. However, further testing of electronic control components requires the use of diagnostic tester B.Vi.958 (early models), MS 1700 (late models) or a suitable equivalent.
1. Disconnect main harness connector from computer, Fig. 3.
2. Connect ohmmeter between terminal B on connector and ground.
3. If reading is not 1-7 ohms, check and repair back-up lamp circuit.
4. Connect voltmeter between connector terminal A and ground.
5. If reading is not 10-14 volts with ignition off, check and repair back-up lamp feed circuit.
6. Connect ohmmeter between connector terminal E and ground.
7. If reading is not 0 ohms with ignition off, repair system ground circuit.
8. Connect voltmeter between connector terminal F and ground.
9. If reading is not 10-14 volts with ignition on, repair computer feed circuit.
10. Connect voltmeter between connector terminal C and ground and operate starter.
11. If reading is not 10-14 volts, check and repair starter circuit.
Fig. 3 Electronic control component identification:
1. Disconnect main harness connector from computer, Fig. 3.
2. Connect ohmmeter between terminal B on connector and ground.
3. If reading is not 1-7 ohms, check and repair back-up lamp circuit.
4. Connect voltmeter between connector terminal A and ground.
5. If reading is not 10-14 volts with ignition off, check and repair back-up lamp feed circuit.
6. Connect ohmmeter between connector terminal E and ground.
7. If reading is not 0 ohms with ignition off, repair system ground circuit.
8. Connect voltmeter between connector terminal F and ground.
9. If reading is not 10-14 volts with ignition on, repair computer feed circuit.
10. Connect voltmeter between connector terminal C and ground and operate starter.
11. If reading is not 10-14 volts, check and repair starter circuit.
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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.