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2014 - Mazda6 - Body and Accessories

FUEL GAUGE READING IS NOT CORRECT [INSTRUMENT CLUSTER]

Possible cause

Diagnostic Procedure



Step

Inspection

Action

1

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [INSTRUMENT CLUSTER].)

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.

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

  • Verify the voltage in the display monitor while shaking the vehicle.

  • Does the voltage change?

Yes

Go to the next step.

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

  • 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.)

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.

    (See FUEL GAUGE SENDER UNIT INSPECTION.)

  • Is the fuel gauge sender unit normal?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between the fuel gauge sender unit and the rear body control module (RBCM).

    If there is a common connector:
  • Determine the malfunctioning part by inspecting the common connector and the terminal for corrosion, damage, or pin disconnection, and the mid-wiring harness for a short to power supply.

  • Repair or replace the wiring harness which has a malfunction.

    If there is no common connector:
  • Repair or replace the wiring harness which has a malfunction.

No

Replace the fuel gauge sender unit.

(See FUEL GAUGE SENDER UNIT REMOVAL/INSTALLATION.)




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