Diagnostic Trouble Codes Group 30: Electrical system
36
FMI 5 Abnormally low current or open
circuit
Possible reason:
• An open circuit in cable harness between EMS 2
and preheat relay.
Suitable action:
1. Check the contact pressure in socket 25 in the
engine connector B.
2. Check cable harness and connectors between
EMS 2 and preheat relay.
Measurements
NOTE! If any of the measurements shows an abnor-
mal value, check the wiring to and from the engine
control unit and the preheat relay.
Checking the wiring:
1. NOTE! Cut the current with the main switch.
2. Remove connector B from the EMS 2.
3. Connect the B connector to brakeout cable
9990014 with measurebox 9998699.
4. Use multimeter 9812519 to do a resistance mea-
surement.
Measurement points on box Nominal value
7 (preheat sense) - R ≈ 0 Ω
one of the preheat connectors
25 (relay activation) - R ≈ 0 Ω
one of the preheat connectors
60 (relay +) - R ≈ 0 Ω
one of the preheat connectors
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