Mazda CX-5 Service & Repair Manual: Low Fuel Warning Light
Purpose
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The low fuel warning light warns the driver that the remaining fuel level is low.
Function
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The instrument cluster calculates the fuel quantity based on the following CAN signals, and if a remaining fuel amount of approx. 10 L {2.6 US gal, 2.2 Imp gal} (fuel gauge displays remaining two segments) is detected, the low fuel warning light illuminates.
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Fuel gauge sender unit voltage signal sent from rear body control module (RBCM)
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Fuel injection amount signal, vehicle speed signal sent from PCM
Construction
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The instrument cluster microcomputer controls the low fuel warning light illumination on/off based on the remaining fuel amount calculation that is calculated by the instrument cluster.
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The low fuel warning light is set in the instrument cluster.
Operation
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When the ignition is switched ON (engine off or on) the instrument cluster receives (1) the fuel gauge sender unit voltage signal from the rear body control module (RBCM), and the fuel injection amount signal from the PCM.
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The instrument cluster turns the transistor on (2) if the calculated remaining fuel amount based on each signal is approx. 10 L {2.6 US gal, 2.2 Imp gal}.
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When the transistor turns on, a ground circuit with the low fuel warning light is established and the low fuel warning light illuminates (3).
Fail-safe
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Function not equipped.
Low Engine Coolant Temperature Indicator Light (Blue)/High Engine Coolant Temperature
Warning Light (Red)
Purpose
Low engine coolant temperature indicator light (blue)
The low engine coolant temperature indicator light (blue) notifies the driver
that the engine coolant temperature is low and va ...
Master Warning Light
Purpose
The master warning light warns the driver that any of the following malfunctions
is occurring.
Brake switch malfunction
Engine oil solenoid valve malfunction
...
Other materials:
PID/Data Monitor Inspection [Standard Deployment Control System]
1. Connect the M-MDS to the DLC?2.
2. After the vehicle is identified, select the following items from the initialization
screen of the M-MDS.
a. Select “DataLogger”.
b. Select “Modules”.
c. Select “RCM”.
3. Select the applicable PID from the PID table.
4. Verify the PID da ...
Light Switch Inspection
Light Switch
1. Disconnect the negative battery cable..
2. Remove the column cover..
3. Remove the light switch..
4. Verify that the continuity between the light switch terminals is as indicated
in the table.
Vehicles without auto light system
Vehicles with auto light system
...
Fuel Pump Control Module
Purpose, Function
Controls the voltage applied to the fuel pump for reducing fuel pump load
and improving fuel economy.
Controls the voltage applied to the fuel pump based on the control signal
from the PCM.
Construction
The fuel pump control module is installed bel ...
