Volvo TSI, Manual

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Group 28 Troubleshooting
MID 128 PID 110 Engine Coolant Temperature
Fault Codes
FMI 0
Temperature too high.
Conditions for fault code:
•
The coolant temperature exceeds 102 C/216 F.
Possible cause:
•
Low coolant level.
•
Fault in thermostat.
•
Clogged radiator (internally/externally).
•
Clogged intercooler (on the outside).
•
Poor through-flow in the cooling system.
•
Worn coolant pump.
•
Fault in pressure cap, expansion tank.
•
Fault in sensor.
Reaction from the EECU:
•
Fault code is set.
•
Power reduction in the first stage.
•
The engine is shut down in the second stage (if en-
gine protection is chosen in the data set).
Noticeable external symptom:
•
LED lights up at the coolant temperature gauge.
•
Low power output.
•
The engine is shut down (if engine protection is cho-
sen in the data set).
FMI 3
Short circuit to voltage or open circuit.
Conditions for fault code:
•
The voltage on EA25 exceeds 4.95 V.
Possible cause:
•
Short circuit to battery or 5 V voltage, signal wire.
•
Short circuit to voltage, ground wire.
•
Break, signal wire.
•
Break, ground wire.
•
Fault in sensor.
Reaction from the EECU:
•
Fault code is set.
•
Yellow lamp is requested.
•
The EECU stops sending PID 110.
Noticeable external symptom:
•
Yellow lamp lights up.
•
The coolant temperature gauge shows 0.
FMI 4
Short circuit to ground.
Conditions for fault code:
•
The voltage on EA25 is under 0.08 V.
Possible cause:
•
Short circuit to ground, signal wire.
•
Fault in sensor.
Reaction from the EECU:
•
Fault code is set.
•
Yellow lamp is requested.
•
The EECU stops sending PID 110.
Noticeable external symptom:
•
Yellow lamp lights up.
•
The coolant temperature gauge shows 0.
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