Troubleshooting - Mitsubishi Electric 55624R(S)-MF Service Manual

OPERATION
<Fuel gauge>
When the ignition key is at the "ON" position,
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the fuel gauge is activated.
When there is much fuel, the unit's resistance is
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small and the current flowing in the circuit is
great, so the gauge's indicator indicates in the
"F" area.
When there is little fuel, the unit's resistance is
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high and the current flowing in the circuit is
small, so the gauge's indicator indicates in the
"E" area.
<Engine coolant temperature gauge>
When the ignition key is at the "ON" position,
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the engine coolant temperature gauge is acti-
vated.
When the engine coolant temperature is high,
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the unit's resistance is low and there is a great
flow of current in the circuit, so the gauge's
indicator indicates in the "H" area.
When the engine coolant temperature is low,
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the unit's resistance is high and there is a small
flow of current in the circuit, so the gauge's
indicator indicates in the "C" area.
<Reed switch>
Pulses are produced in accordance with the
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vehicle speed, and vehicle-speed signals are
input to systems (the transaxle-control system,
etc.) that regulate according to the vehicle
speed.
NOTE
For operation of warning light and indicator light,
refer to P.54-36.
METERS AND GAUGES
TSB Revision
TROUBLESHOOTING HINTS
1. The fuel gauge doesn't function, or shows the
incorrect indication.
(1) Disconnect the connector of the fuel gauge
unit; the "F" side is indicated when terminal
3 (FWD) or 2 (AWD) is then grounded.
Check the fuel gauge.
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2. The engine coolant temperature gauge doesn't
function, or shows the incorrect indication.
(1) The "H" side is indicated when the connec-
tor of the engine coolant temperature gauge
unit is disconnected and then grounded.
Check the engine coolant temperature
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gauge unit.
3. Systems dependent upon control according to
the vehicle speed do not function correctly.
Check the reed switch (located within the
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speedometer).
4. The meter illumination light does not illuminate.
Check the rheostat.
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