Mercury V6 175 Diagnostic Manual page 9

Section 3E ‑ CDS G3—Diagnostics Screen provides an overview of the diagnostic tests available in CDS G3.
Section 3F ‑ CDS G3—Module Reflash provides an overview of the diagnostic tests available in CDS G3.
Section 4 ‑ Fault Codes
The following comprise Section 4.
Section 4A ‑ Fault Codes covers the possible faults the CDS G3 may report, along with an explanation and suggestions for
eliminating the fault.
Section 5 ‑ Sensors, Actuators, Relays, and Accessories
The following comprise Section 5.
Section 5A ‑ Sensors contains a sensor test, and removal and installation information for each sensor.
Section 5B ‑ Actuators and Relays contains an overview of each actuator and relay, along with general troubleshooting.
Section 5C ‑ Accessories contains circuit and general troubleshooting information for accessories.
Section 6 ‑ Electrical Systems
The following comprise Section 6.
Section 6A ‑ Ignition focuses on ignition related specifications, tests, and wiring diagrams.
Section 6B ‑ Charging and Starting System focuses on charging and starting system related specifications, tests, and wiring
diagrams.
Section 6C ‑ Conventional Midsection (CMS) Power Trim contains troubleshooting and testing information for the CMS
power trim system.
Section 6D ‑ Advanced Midsection (AMS) Power Trim contains troubleshooting and testing information for the AMS power
trim system.
Section 7 ‑ Fuel System
The following comprise Section 7.
Section 7A ‑ Fuel System contains specifications, system theory, parts overviews, and fuel flow diagrams.
Section 7B ‑ Troubleshooting and Diagnostics contains general troubleshooting and diagnostic information for the fuel
system.
Section 8 ‑ Color Diagrams
The following comprise Section 8.
Section 8A ‑ SmartCraft Circuit Diagrams contains SmartCraft related, and clean power circuit diagrams.
Section 8B ‑ Engine Harness Diagrams contains complete engine harness circuit diagrams.
General Service Precautions When Working on EFI Systems
Before working around electrical system components, disconnect the battery cables from the battery to prevent injury or
damage to the electrical system due to an accidental short circuit.
Disconnecting or connecting the battery cables in the incorrect order can cause injury from electrical shock or can damage
the electrical system. Always disconnect the negative (‑) battery cable first and connect it last.
Avoid serious injury or death from the loss of DTS electrical power. The DTS power harness must be securely fastened with
cable ties to one of the battery cables near the battery. If not properly secured, the DTS power harness could be pulled off the
battery, resulting in the loss of electrical power and a loss of throttle and shift control.
In addition to adhering to general safety practices, the following should be observed:
• Always disconnect the negative terminal first when removing a battery, and connect it last when installing a battery to
prevent arcing.
• Never start the engine without the battery being solidly connected.
90-8M0146617 eng JULY 2018
WARNING
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CAUTION
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WARNING
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© 2018 Mercury Marine
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