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ON BOARD DIAGNOSTIC (OBD) MEFI CONTROLLED MARINE ENGINE
WARNING: Fire, Shock, and Burn Danger: When performing any
diagnostics or service work use caution. This system has extreme fuel
pressures and a high voltage ignition.
CAUTION: Electronic controls contain static-sensitive parts. Observe
the following precautions to prevent damage to these parts. Discharge body
static: before handling the control. (Make sure power to the control is turned
off, contact a grounded surface and maintain contact while, handling the
control). Avoid all plastic, vinyl, and Styrofoam (except antistatic versions)
around printed circuit boards. Do not touch the components or conductors
on a printed circuit board with your hands or with conductive devices.
1.Verify that none of the following preliminary inspections/tests reveal the cause of
the vehicle concern before beginning diagnosis.
• Ensure that the battery is fully charged.
• Ensure that the battery cables are clean and tight.
• Inspect for any open fuses.
• Ensure that the grounds are clean, tight, and in the correct location.
• Inspect the easily accessible systems or the visible system components for
obvious damage or conditions that could cause the concern. This would include
checking to ensure that all connections/connectors are fully seated and
secured.
• Inspect for aftermarket devices that could affect the operation of the system.
• Search for applicable service bulletins.
2. Ensure that the battery is fully charged.
3. Ensure that the battery cables are clean and tight.
4. Inspect for any open fuses.
5. Ensure that the grounds are clean, tight, and in the correct location.
6. Inspect the easily accessible systems or the visible system components for
obvious damage or conditions that could cause the concern. (This would
include checking to ensure that all connections/connectors are fully seated and
secured.)
7. Inspect for aftermarket devices that could affect the operation of the system.
8. Search for applicable service bulletins.
9. Install a scan tool. Verify that the scan tool powers up.
10. Ignition ON, Engine OFF, verify communication with all of the control modules
on the vehicle.
11. Verify that SPN 65559 is not set; if SPN 65559 is set, refer to SPN 65559
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