Volvo TAD650VE Workshop Manual page 90

Diagnostic Trouble Codes
88
Fault tracing
FMI 3 Abnormally high voltage or short
circuit to higher voltage
Possible reason:
• Stop signal activated too long.
• Faulty stop button.
Suitable action:
1. Check that the stop button isn't stucked.
2. Check that stop button is connected correctly.
3. Check cable harness and connectors at aux stop
button at EMS / stop button at CIU.
4. Check function of aux stop button at EMS / stop
button at CIU.
FMI 4 Abnormally low voltage or short
circuit to lower voltage
Possible reason:
• Short circuit to battery negative.
Suitable action:
1. Check cable harness and connectors at aux stop
button at EMS / stop button at CIU.
2. Check function of aux stop button at EMS / stop
button at CIU.
FMI 5 Abnormally low current or open
circuit
Possible reason:
•
An open circuit in aux stop circuit.
Suitable action:
1. Check cable harness and connectors at aux stop
button at EMS / stop button at CIU.
2. Check function of aux stop button at EMS / stop
button at CIU.
Group 30: Electrical system