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Home >> Mazda >> 2020 >> 6 Sport >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> On-Board Diagnostics (2 Of 3) (SKYACTIVE-G 2.5 (With Cylinder Deactivation)) >> DTC P0460-00: Fuel Level Sensor Circuit Malfunction >> Diagnostic Procedure

Diagnostic Procedure

DTC P0460:00 PCM (SKYACTIV-G 2.5 - WITH CYLINDER DEACTIVATION) 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 VERIFY RELATED PENDING CODE AND/OR DTC Yes Go to the applicable PENDING CODE or DTC inspection.
(See DTC P0462:00 [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))] .)
(See DTC P0463:00 [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))] .)
(See DTC U0323:00 [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))] .)
No Go to the next step.
4 INSPECT NON-GENUINE ACCESSORY FOR MALFUNCTION Yes Go to the next step.
No
  • Explain to the customer that the vehicle is normal.
  • Go to Step 12.
5 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 12.
No Go to the next step.
6 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 12.
No Go to the next step.
7 INSPECT FUEL GAUGE SENDER UNIT 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 following terminals (wiring harness-side):
      • Fuel gauge sender unit terminal D
      • Fuel gauge sender unit terminal C
    • 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 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 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 12.
8 INSPECT FUEL GAUGE SENDER UNIT SIGNAL CIRCUIT FOR SHORT TO GROUND
  • Verify that the fuel gauge sender unit and rear body control module (RBCM) connectors are disconnected.
  • Switch the ignition off.
  • Inspect for continuity between fuel gauge sender unit terminal D (wiring harness-side) and body ground.
  • Is there continuity?
Yes 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 ground.
  • Repair or replace the malfunctioning part.

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

Go to Step 12.
No Go to the next step.
9 INSPECT FUEL GAUGE SENDER UNIT SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
  • Verify that the fuel gauge sender unit and rear body control module (RBCM) connectors are disconnected.
  • Inspect for continuity between fuel gauge sender unit terminals D and C (wiring harness-side).
  • Is there continuity?
Yes 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 a short to each other.
  • Repair or replace the malfunctioning part.

If there is no common connector:
  • Repair or replace the wiring harness which has a short to each other.

Go to Step 12.
No Go to the next step.
10 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.
  • 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 12.
11 INSPECT FUEL GAUGE SENDER UNIT Yes Replace the fuel gauge sender unit, then go to the next step.
(See FUEL PUMP UNIT DISASSEMBLY/ASSEMBLY [SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION)] .)
No Go to the next step.
12 VERIFY DTC TROUBLESHOOTING COMPLETED Yes Go to the next step.
No Go to the next step.
13 VERIFY AFTER REPAIR PROCEDURE Yes Go to the applicable DTC inspection.
(See DTC TABLE [PCM (SKYACTIV-G 2.5 (WITH CYLINDER DEACTIVATION))] .)
No DTC troubleshooting completed.