Est1_Outputfault; Est2_Outputfault; Est3_Outputfault; Est4_Outputfault - Mercury V6 175 Diagnostic Manual

• Worn linkage between shift shaft and shift actuator
• Worn gearcase components
• Faulty shift actuator
Summary of Fault Correction Possibilities
• Correct the wiring problem.
• Replace the worn shift linkage components.
• Replace the worn gearcase components.
• Replace the shift actuator.

EST1_OutputFault

EST2_OutputFault

EST3_OutputFault

EST4_OutputFault

The following information applies to EST1_OutputFault, EST2_OutputFault, EST3_OutputFault, and EST4_OutputFault.
Fault Type: Horn:
Nonsticky Caution
Explanation
The respective ignition coil (1, 2, 3, or 4) does not appear to be working properly; the PCM detected a problem when trying to
send a signal to this coil.
Possible Causes
• Air in the fuel system
• Fouled spark plug
• Failed spark plug wire
• Failed ignition coil
• Damaged wiring to ignition coil
Summary of Fault Correction Possibilities
• Purge the fuel system of air.
• Replace the spark plugs.
• Inspect the spark plug wires.
• Replace the ignition coil.
• Repair the wiring to the ignition coil.

ESTOP_Active

Fault Type: Horn:
Nonsticky Caution
Explanation
This fault indicates that an E‑stop has been activated. The engine will power up, but the PCM will disregard a start command.
Possible Causes
• Lanyard has been activated or the circuit is shorted
• DTS (if equipped) calibration has not been correctly completed
• Failed command module
Summary of Fault Correction Possibilities
• Deactivate the lanyard or troubleshoot the circuit (locate and correct the short).
90-8M0146617 eng JULY 2018
Guardian:
100% 101‑16, 102‑16, 103‑16, 104‑16
Guardian: UFC:
100% 1109‑23
UFC: Transmission to Helm:
Transmission to Helm:
Yes
© 2018 Mercury Marine
Freeze Frame Priority:
Yes
Freeze Frame Priority:
1
Fault Codes
2
Page 4A-17