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Home >> Mazda >> 2022 >> CX-5 S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 8 (On-Board Diagnostic - Engine Control System (VIN Y) (4 Of 7)) >> DTC P0463-00: Fuel Gauge Sender Unit Circuit High Input >> Diagnostic Procedure

Diagnostic Procedure

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DTC P0463-00: (PCM, VIN Y) DIAGNOSTIC PROCEDURE

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 (MAIN) CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the fuel gauge sender unit (main) 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 13.
No 2WD:
  • Go to Step 5.

AWD:
  • Go to the next step.
4 INSPECT FUEL GAUGE SENDER UNIT (SUB) CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the fuel gauge sender unit (sub) 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 13.
No Go to the next step.
5 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 13.
No Go to the next step.
6 INSPECT FUEL GAUGE SENDER UNIT (MAIN) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
  • Verify that the fuel gauge sender unit (main) 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 (main) terminal D (wiring harness-side).
  • Is the voltage 0 V?
 Yes 2WD:
  • Go to Step 8.

AWD:
  • 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 (main) 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 13.
7 INSPECT FUEL GAUGE SENDER UNIT (SUB) SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY
  • Verify that the fuel gauge sender unit (sub) 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 (sub) terminal A (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 (sub) terminal A and rear body control module (RBCM) terminal 3K.
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 13.
8 INSPECT FUEL GAUGE SENDER UNIT (MAIN) CIRCUIT FOR OPEN CIRCUIT
  • Verify that the fuel gauge sender unit (main) 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 (main) terminal D-Rear body control module (RBCM) terminal 3I
    • Fuel gauge sender unit (main) terminal C-Rear body control module (RBCM) terminal 3C
  • Is there continuity?
 Yes 2WD:
  • Go to Step 10.

AWD:
  • 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 (main) terminal-Rear body control module (RBCM) terminal 3I
  • Fuel gauge sender unit (main) 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 13.
9 INSPECT FUEL GAUGE SENDER UNIT (SUB) CIRCUIT FOR OPEN CIRCUIT
  • Verify that the fuel gauge sender unit (sub) 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 (sub) terminal A-Rear body control module (RBCM) terminal 3K
    • Fuel gauge sender unit (sub) terminal B-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 (sub) terminal A-Rear body control module (RBCM) terminal 3K
  • Fuel gauge sender unit (sub) terminal B-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 13.
10 INSPECT FUEL GAUGE SENDER UNIT Yes Replace the fuel gauge sender unit (main) or fuel gauge sender unit (sub) (AWD), then go to Step 13.
(See FUEL GAUGE SENDER UNIT REMOVAL/INSTALLATION [AWD] ).
No Go to the next step.
11 INSPECT REAR BODY CONTROL MODULE (RBCM) Yes Replace the rear body control module (RBCM), then go to Step 13.
(See REAR BODY CONTROL MODULE (RBCM) REMOVAL/INSTALLATION ).
No Go to the next step.
12 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.
13 VERIFY DTC TROUBLESHOOTING COMPLETED
  • Always reconnect all disconnected connectors.
  • Clear the DTC from the PCM memory using the M-MDS. (See CLEARING DTC ).
  • Perform the KOEO or KOER self test. (See KOEO/KOER SELF TEST ).
  • Is the same Pending DTC present?
 Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
14 VERIFY AFTER REPAIR PROCEDURE Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No DTC troubleshooting completed.
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