Diagnostic Procedure

WARNING: This page is about a different car, the 2016 Mazda CX-5. However, it is still accessible from the selected car via links, so may be relevant.

Step	Inspection		Action
1	PERFORM CAN MALFUNCTION DIAGNOSIS AND DTC INSPECTION Perform the CAN malfunction diagnosis according to the recommendation of FOREWORD [INSTRUMENT CLUSTER] malfunction diagnosis, and if there is no CAN malfunction, perform inspection for DTCs. (See DTC INSPECTION [INSTRUMENT CLUSTER] .) Is the DTC displayed?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER] .)
1		No	Go to the next step.
2	INSPECTION OF INSTRUMENT CLUSTER Perform inspection of the fuel gauge/LCD display referring to the instrument cluster inspection. (See INSTRUMENT CLUSTER INSPECTION .) Is the display normal?	Yes	Go to the next step.
2		No	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
3	DETERMINE IF MALFUNCTION CAUSE IS FUEL GAUGE SENDER Display the following rear body control module (RBCM) PIDs using the M-MDS. FUEL_SEN_M FUEL_SEN_S (AWD) Verify the voltage in the display monitor while shaking the vehicle. Does the voltage change?	Yes	Go to the next step.
3		No	Go to Step 5.
4	DETERMINE IF MALFUNCTION CAUSE IS REAR BODY CONTROL MODULE (RBCM) Display the following instrument cluster PIDs using the M-MDS. FUEL_SEN_M FUEL_SEN_S (AWD) Verify the resistance in the display monitor while shaking the vehicle. Does the resistance change?	Yes	Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
4		No	Replace the rear body control module (RBCM). (See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION .)
5	INSPECT FUEL GAUGE SENDER UNIT Switch the ignition off (LOCK). Inspect the fuel gauge sender unit (2WD) or the fuel gauge sender unit (main/sub) (AWD). (See FUEL GAUGE SENDER UNIT INSPECTION [2WD] .) (See FUEL GAUGE SENDER UNIT INSPECTION [AWD] .) Is the fuel gauge sender unit (2WD) or the fuel gauge sender unit (main/sub) (AWD) normal?	Yes	Inspect the wiring harness between the fuel gauge sender unit (2WD) or the fuel gauge sender unit (main/sub) (AWD) and the rear body control module (RBCM), and repair or replace the malfunctioning part.
5		No	Replace the fuel gauge sender unit (2WD) or the fuel gauge sender unit (main/sub) (AWD). (See FUEL GAUGE SENDER UNIT REMOVAL/INSTALLATION [2WD] .) (See FUEL GAUGE SENDER UNIT REMOVAL/INSTALLATION [AWD] .)