Purpose
The fuel gauge notifies the user of the amount of remaining fuel.
Function
The instrument cluster calculates the amount of fuel in the fuel tank based on the following CAN signals and displays the fuel gauge segments.
Fuel gauge sender unit voltage signal sent from rear body control module (RBCM)
Fuel injection amount signal, vehicle speed signal sent from PCM
Fuel gauge flicker prevention function
When the instrument cluster determines that the vehicle is being driven, it retards the response with which the calculated amount of fuel is reflected to the fuel gauge. As a result, fuel gauge flicker caused by the variation of fuel surface during driving is prevented.
Refuel determination function
If the amount of fuel is changed by 5 L {1 US gal, 1 Imp gal}/2 L {0.5 US gal, 0.4 Imp gal}*1 or more while the vehicle is stopped, the instrument cluster determines that the vehicle is refueled and displays the fuel gauge segments based on the fuel gauge sender unit voltage signal from the rear body control module (RBCM).
Construction
The fuel gauge is displayed in the LCD of the instrument cluster.
The fuel gauge is consists of 15 segments.

Operation
When the ignition is switched ON (engine off or on), the rear body control module (RBCM) converts the resistance from the fuel gauge sender unit to voltage and sends it to the instrument cluster as a fuel gauge sender unit voltage signal (1).
The instrument cluster receives the fuel gauge sender unit voltage signal from the rear body control module (RBCM), and it also receives the fuel injection amount signal and vehicle speed signal from the PCM (2).
The instrument cluster calculates the amount of fuel in the fuel tank based on the signals (3).
The instrument cluster displays/turns off the fuel gauge segments according to the calculation result (4).

Fail-safe
Function not equipped.
Ambient Temperature Display Switching Procedure
Fuel Gauge Sender Unit Inspection [2 Wd]Airflow Mode Main Link Removal/Installation
Full-auto Air Conditioner
1. The airflow mode main link is installed to the airflow mode actuator. When
removing the airflow mode main link, refer to the airflow mode actuator removal/installation..
Manual Air Conditioner
1. Disconnect the negative battery cable..
2. Remove the glove compar ...
Crankshaft Position (CKP) Sensor
Purpose/Function
Detects the crankshaft speed as basic information for mainly determining
the fuel injection timing and ignition timing.
Detects the crankshaft speed and inputs it to the PCM as a CKP signal.
Construction
Installed on the side of the cylinder block (ri ...
Break-In Period
No special break-in is necessary, but a few precautions in the first 1,000 km
(600 miles) may add to the performance, economy, and life of your Mazda.
• Do not race the engine.
• Do not maintain one constant speed,
either slow or fast, for a long period of time.
• Do not drive constantl ...