NOTE: If battery terminals are disconnected while engine is running or when ignition switch is in "ON" position, malfunction of computer or damage to semi-conductors could result.

Turn ignition switch to "OFF" position. Remove harness connectors "A" and "B" from Carburetor Control Unit (CCU). See Fig 1 .
Set check switch of Feedback Carburetor Checker (09341-21000) to "OFF" position.See Fig 2 .
Set select switch of checker to "A" position. See Fig 3 . Connect FBC wiring harness connector to connectors of FBC checker.
Connect FBC connector to CCU connectors. Perform checks according to FBC Systems Check Chart.
If checker shows variation from specifications, check defective sensor and electrical wiring. Repair or replace defective components.
After repair or replacement of defective components, recheck system with checker. Set check switch of checker to "OFF" position.
Set ignition switch to "OFF" position. Disconnect all harness connectors and reinstall in proper harness connectors.

Fig 1: Feedback Carburetor (FBC) System

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

Diagnostic Circuit Check

Use the Manual With the Right Hardware

When to See a Mechanic

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