To ensure power supply to power unit, disconnect primary wires connector at ignition coil. Turn ignition on. Using voltmeter, check for battery voltage between coil positive terminal (Black/White wire) and ground. See Fig 1 . If battery voltage does not exist, check ignition fuse circuit.
To check power unit resistance, turn ignition off. Remove power unit from under ignition coil. Tape together two 1.5-volt batteries in series to create a 3-volt power source. Install leads to 3-volt power source. Apply negative lead to "G" terminal and positive lead to terminal IB of power unit. See Fig 2 .
Using ohmmeter, connect positive lead to terminal "G" and negative lead to terminal OC of power unit. See Fig 2 . Check for continuity with 3-volt power source applied to terminal IB. Check for no continuity with 3-volt power source disconnected from terminal IB. Replace power unit if test results are not within specification.

Fig 1: Testing Ignition Coil Power Supply (Typical)

Courtesy of SUZUKI OF AMERICA CORP.

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.

Safety Warning

Sidekick & Swift DOHC