Dual_Tps_Faults; Egt_Overtemp; Egt_Rangehigh - Mercury V6 175 Diagnostic Manual

Fault Codes

Dual_TPS_Faults

Fault Type: Horn:
Nonsticky Critical
Explanation
The throttle position sensors (TPS) do not agree.
Possible Causes
• ETC wiring problem
• Failed throttle body assembly
Summary of Fault Correction Possibilities
• Inspect the wiring to the ETC.
• Replace the throttle body assembly.
E ..........

EGT_Overtemp

Fault Type: Horn:
Nonsticky Critical
Explanation
The value from the exhaust gas temperature (EGT) sensor is higher than normal, indicating that the exhaust manifold is
overheating.
Possible Causes
• Restricted water flow
• Plugged exhaust sprayer
• Wiring problem
• Defective sensor
Summary of Fault Correction Possibilities
• Restore the water flow.
• Remove debris from the sprayer.
• Inspect the wiring.
• Check the sensor, replace if required.

EGT_RangeHigh

Fault Type: Horn:
Nonsticky Caution
Explanation
The exhaust gas temperature (EGT) sensor does not appear to be working properly; the PCM received a signal that is above
the valid limit.
Possible Causes
• Wiring problem
• Defective sensor
Summary of Fault Correction Possibilities
• Inspect the wiring to the sensor.
• Check the sensor.
• Check the exhaust sprayer outlets for obstructions.
Page 4A-14
Guardian: UFC:
7% 311‑6
Guardian: UFC:
10% 2124‑20
Guardian: UFC:
100% 572‑24
© 2018 Mercury Marine
Transmission to Helm:
Yes
Transmission to Helm:
Yes
Transmission to Helm:
Yes
Freeze Frame Priority:
4
Freeze Frame Priority:
4
Freeze Frame Priority:
2
90-8M0146617 eng JULY 2018