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.
1988 Suzuki Samurai JXFACTORY OEM SERVICE PROCEDURE
Power Circuits
- Ignition coil, solenoids and/or solenoids valves are connected to ECM. If any component(s) is disconnected or fails, a signal will not be sent to ECM. As a result, feedback will NOT operate properly. To check power circuits, disconnect ECM connector at ECM.
- Turn ignition on without starting engine. Attach a voltmeter between terminal No. 2 (wire harness side) and a good ground. See Fig 1 . Voltage should be approximately 12 volts. Repeat procedure for terminals No. 3, 8, 9, 12, 13, 16, and 18.
- If any circuit is not approximately 12 volts, repair wire and/or replace component as necessary.
Factory Service Tools
Use the Manual With the Right Hardware
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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.