CAUTION: When certain materials rub together, a transfer of electrons from one material to another may occur under special conditions. This causes electrostatic charge (static electricity) build up in one of the materials. When any conducting material comes in contact with the charged material, electrostatic discharge occurs, transferring electrons to the third material. Electronic components used in control systems are designed to carry very low voltages; a 30-volt charge created by static electricity can cause a total or degrading failure in ECM or other electronic components containing integrated circuits. Before servicing ECM, ground yourself, and ground the work area to discharge stored electricity.

STATIC CHARGE (VOLTS)

Movement

10-20% ⁽¹⁾

65-90% ⁽¹⁾

Walking Across Carpet

35,000

1500

Handling Clear Plastic Bag

20,000

1200

Sliding Across Velour Seat

15,000

400

Walking Across Tile/Vinyl

12,000

Handling Vinyl Envelope

7000

600

⁽¹⁾	Relative Humidity

CAUTION: DO NOT remove ECM from packaging until ready to install. Ground static-proof package BEFORE opening. DO NOT touch electrical terminals of components unless properly grounded. DO NOT lay electrical components on car seat, carpeting or dashboard. Use electrostatic protection mat and ground strap whenever possible. See Fig 1.

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

Control Unit: Notes

Use the Manual With the Right Hardware

When to See a Mechanic

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