Mercury V8 300 User Manual

Explanation
There is a circuit problem on CAN X.
Possible Causes
• Open or short on CAN X (brown and yellow wires)
• Faulty terminator resistor
NOTE: Resistance across the bottom PCM engine harness pins A31 and A32 and across command module harness pins
6 and 7 should measure 58–60 ohms. Resistance across pins A31 and A32 at the PCM should show approximately 37.1K
ohms. Resistance across the command module pins 6 and 7 should show approximately 37.1K ohms.
Summary of Fault Correction Possibilities
• Repair the open or short on CAN X (brown and yellow wires).
• Replace the terminator resistor.
• Replace the command module.
RxDoc2_SOH
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Caution 100% 4005‑6 Yes 2
Explanation
There is a circuit problem with CAN P.
Possible Causes
• Open or short on CAN P (blue and white wires)
• Faulty terminator resistor
NOTE: Resistance across the bottom PCM engine harness pins A11 and A21 and across command module harness pins
8 and 9 should measure 58–60 ohms. Resistance across pins A11 and A21 at the PCM should show approximately 37.1K
ohms. Resistance across the command module pins 8 and 9 should show approximately 37.1K ohms.
Summary of Fault Correction Possibilities
• Repair the open or short on CAN P (blue and white wires).
• Replace the terminator resistor.
• Replace the command module.
RxDoc3_SOH
Fault Type:
Horn: Guardian: UFC: Transmission to Helm: Freeze Frame Priority:
Nonsticky Critical 100% 4006‑6 Yes 3
Explanation
There is a circuit problem with CAN P.
Possible Causes
• Open or short on CAN P (blue and white wires)
• Faulty terminator resistor
NOTE: Resistance across the bottom PCM engine harness pins A11 and A21 and across command module harness pins
8 and 9 should measure 58–60 ohms. Resistance across pins A11 and A21 at the PCM should show approximately 37.1K
ohms. Resistance across the command module pins 8 and 9 should show approximately 37.1K ohms.
Summary of Fault Correction Possibilities
• Repair the open or short on CAN P (blue and white wires).
• Replace the terminator resistor.
• Replace the command module.
Fault Codes
Page 4A-32 © 2018 Mercury Marine 90-8M0146617 eng JULY 2018

Mercury V8 300 Specifications

General

Horsepower	300 HP
Displacement	4.6 L
Full Throttle RPM Range	5200-6000 RPM
Fuel Induction System	Electronic Fuel Injection (EFI)
Gear Ratio	1.75:1
Starting	Electric
Shaft Length	20 in, 25 in, 30 in
Warranty	3-Year Limited Warranty
Engine Type	V8
Fuel Type	87 Octane
Bore x Stroke	92 mm x 86 mm