Map_Time_Rangelow; Mapr_Tps1Rationality - Mercury V6 175 Diagnostic Manual

Fault Codes
• Restricted sensor reference hose
• Valve train issue
Summary of Fault Correction Possibilities
• Replace the sensor.
• Correct the wiring problem.
• Check the reference hose for leaks.
• Check the cylinder leak down.

MAP_Time_RangeLow

Fault Type: Horn:
Nonsticky Caution
Explanation
The manifold absolute pressure (MAP) sensor does not appear to be working properly; the PCM received a signal that is below
the valid limit.
Possible Causes
• Sensor out of range
• Wiring problem
• Restricted sensor reference hose
• Valve train issue
Summary of Fault Correction Possibilities
• Replace the sensor.
• Correct the wiring problem.
• Check the reference hose for leaks.
• Check the cylinder leak down.

MAPR_TPS1Rationality

Fault Type: Horn:
Nonsticky Caution
Explanation
The values received from the manifold absolute pressure (MAP) sensor and the primary encoder in the throttle position sensor
(TPS) do not agree.
Possible Causes
• MAP or ETC wiring problem
• ETC opening is restricted or airflow to the engine is restricted
• Intake manifold has vacuum leak
• MAP sensor or ETC is failed
Summary of Fault Correction Possibilities
• Correct the MAP sensor or ETC wiring problem.
• Inspect the cold air intake assembly for obstructions.
• Inspect the intake manifold for air leaks.
• Replace the MAP sensor or throttle body assembly.
Page 4A-26
Guardian: UFC:
100% 401‑25
Guardian: UFC:
100% 404‑6
© 2018 Mercury Marine
Transmission to Helm:
Yes
Transmission to Helm:
Yes
Freeze Frame Priority:
2
Freeze Frame Priority:
2
90-8M0146617 eng JULY 2018