LEMON Manuals: Even more car manuals for everyone
Home >> Mazda >> 2017 >> CX-5 Grand Select, FWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 138 (On-Board Diagnostic - Engine Control (3 Of 5)) >> DTC P0453; Pcm Fuel Tank Pressure Sensor High Input >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2017 Mazda 3. However, it is still accessible from the selected car via links, so may be relevant.
DIAGNOSTIC POROCEDURE

STEP INSPECTION ACTION
1 VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
  • Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
 Yes Go to the next step.
No Record the FREEZE FRAME DATA (Mode 2)/snapshot data on the repair order, then 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 DETERMINE IF FUEL TANK PRESSURE SENSOR OR WIRING HARNESS MALFUNCTION Yes Go to Step 7.
No Go to the next step.
4 INSPECT FUEL TANK PRESSURE SENSOR CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the fuel tank pressure sensor 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.
5 INSPECT PCM CONNECTOR CONDITION
  • Disconnect the PCM 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 FUEL TANK PRESSURE SENSOR Yes Replace the charcoal canister, then go to Step 12.
(See CHARCOAL CANISTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
No Go to Step 12.
7 DETERMINE IF FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT OR FUEL TANK PRESSURE SENSOR GROUND CIRCUIT MALFUNCTION Yes Go to the next step.
No Go to Step 10.
8 INSPECT FUEL TANK PRESSURE SENSOR SIGNAL CIRCUIT FOR TO POWER SUPPY
  • Verify that the fuel tank pressure sensor connector is disconnected.
  • Switch the ignition off.
  • Disconnect the PCM connector.
  • 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 tank pressure sensor terminal C (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 tank pressure sensor terminal C and PCM terminal 2Y.
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.
9 INSPECT FUEL TANK PRESSURE SENSOR POWER SUPPLY CIRCUIT AND SIGNAL CIRCUIT FOR SHORT TO EACH OTHER
  • Verify that the fuel tank pressure sensor and PCM connectors are disconnected.
  • Inspect for continuity between fuel tank pressure sensor terminal A 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 tank pressure sensor terminal A-PCM terminal 2BB
  • Fuel tank pressure sensor terminal C-PCM terminal 2Y

    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 Replace the PCM, then go to the Step 12.
(See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
10 INSPECT FUEL TANK PRESSURE SENSOR POWER SUPPLY CIRCUIT FOR SHORT TO POWER SUPPLY
  • Verify that the fuel tank pressure sensor connector is 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 tank pressure sensor terminal A (wiring harness-side).
  • Is the voltage 5 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 tank pressure sensor terminal A and PCM terminal 2BB.
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.
11 INSPECT FUEL TANK PRESSURE SENSOR GROUND CIRCUIT FOR OPEN CIRCUIT
  • Verify that the fuel tank pressure sensor connector is disconnected.
  • Switch the ignition off.
  • Disconnect the PCM connector.
  • Inspect for continuity between fuel tank pressure sensor terminal B (wiring harness-side) and PCM terminal 2AJ (wiring harness-side).
  • Is there continuity?
 Yes Replace the charcoal canister, then go to the next step.
(See CHARCOAL CANISTER REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)
No Refer to the wiring diagram and verify whether or not there is a common connector between fuel tank pressure sensor terminal B and PCM terminal 2AJ.
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 the next step.
12 VERIFY DTC TROUBLESHOOTING COMPLETED Yes Repeat the inspection from Step 1.
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 2.0, SKYACTIV-G 2.5)] .)
No DTC troubleshooting completed.
scientia non olet · About LEMON Manuals