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Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> On-Board Diagnostic - Engine Control System (2 Of 5) >> DTC P0463-00: Fuel Gauge Sender Unit Circuit High Input >> Diagnostic Procedure

Diagnostic Procedure

DIAGNOSTIC PROCEDURE DESCRIPTION

STEP INSPECTION RESULTS ACTION
1 RECORD VEHICLE STATUS AT TIME OF DTC DETECTION TO UTILIZE WITH REPEATABILITY VERIFICATION
NOTE:
  • Recording can be facilitated using the screen capture function of the PC.
  • Record the FREEZE FRAME DATA/snapshot data on the repair order.
- Go to the next step.
2 VERIFY RELATED REPAIR INFORMATION AVAILABILITY
  • Verify related Service Bulletins and/or on-line repair information availability.
  • Is any related repair information available?
Yes Perform repair or diagnosis according to the available repair information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 INSPECT FUEL GAUGE SENDER UNIT CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the fuel gauge sender unit connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
Yes Repair or replace the connector and/or terminals, then go to Step 10.
No Go to the next step.
4 INSPECT REAR BODY CONTROL MODULE (RBCM) CONNECTOR CONDITION
  • Disconnect the rear body control module (RBCM) connector.
  • Inspect for poor connection (such as damaged/pulled-out pins, corrosion).
  • Is there any malfunction?
Yes Repair or replace the connector and/or terminals, then go to Step 10.
No Go to the next step.
5 INSPECT FUEL GAUGE SENDER UNIT SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
  • Verify that the fuel gauge sender unit and rear body control module (RBCM) connectors are disconnected.
  • Switch the ignition ON (engine off).
    NOTE:
    • Another DTC may be stored by the PCM detecting an open circuit.
  • Measure the voltage at the fuel gauge sender unit terminal D (wiring harness-side).
  • Is the voltage 0 V?
Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between fuel gauge sender unit terminal D and rear body control module (RBCM) terminal 3I.
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 common wiring harness for a short to power supply.
  • Repair or replace the malfunctioning part.

    If there is no common connector:

  • Repair or replace the wiring harness which has a short to power supply.

Go to Step 10.
6 INSPECT FUEL GAUGE SENDER UNIT CIRCUIT FOR OPEN CIRCUIT
  • Verify that the fuel gauge sender unit and rear body control module (RBCM) connectors are disconnected.
  • Switch the ignition off.
  • Inspect for continuity between the following terminals (wiring harness-side):
    • Fuel gauge sender unit terminal D-Rear body control module (RBCM) terminal 3I
      • Fuel gauge sender unit terminal C-Rear body control module (RBCM) terminal 3C
  • Is there continuity?
Yes Go to the next step.
No Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Fuel gauge sender unit terminal D-Rear body control module (RBCM) terminal 3I
  • Fuel gauge sender unit terminal C-Rear body control module (RBCM) terminal 3C

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 common wiring harness for an open circuit.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has an open circuit.

Go to Step 10.
7 INSPECT FUEL GAUGE SENDER UNIT Yes Replace the fuel gauge sender unit, then go to Step 10.
(See FUEL PUMP UNIT DISASSEMBLY/ASSEMBLY [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
No Go to the next step.
8 INSPECT REAR BODY CONTROL MODULE (RBCM) Yes Replace the rear body control module (RBCM), then go to Step 10.
(See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION .)
No Go to the next step.
9 INSPECT INSTRUMENT CLUSTER Yes Replace the instrument cluster, then go to the next step.
(See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
No Go to the next step.
10 VERIFY DTC TROUBLESHOOTING COMPLETED Yes Repeat the inspection from Step 1.
  • If the malfunction recurs, replace the PCM.

(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
Go to the next step.
No Go to the next step.
11 VERIFY AFTER REPAIR PROCEDURE Yes Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.0, SKYACTIV-G 2.5)] .)
No DTC troubleshooting completed.