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Home >> Mazda >> 2021 >> CX-5 Sport, FWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (On-Board Diagnostic - Engine Control (VIN Y) (3 Of 3)) >> DTC P2564-00: WASTEGATE Valve Position Sensor Circuit Low Input >> Diagnostic Procedure

Diagnostic Procedure

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DTC P2564:00 (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 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 WASTEGATE VALVE CONNECTOR CONDITION
  • Switch the ignition off.
  • Disconnect the wastegate valve 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 9.
No Go to the next step.
4 INSPECT WASTEGATE VALVE POSITION SENSOR CIRCUIT FOR SHORT TO GROUND
  • Verify that the wastegate valve connector is disconnected.
  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:
    • Wastegate valve terminal A
    • Wastegate valve terminal E
  • Is there continuity?
Yes Disconnect the PCM connector and inspect the wiring harness for short to ground.
  • If the short to ground circuit could be detected in the wiring harness:
    • Refer to the wiring diagram and verify whether or not there is a common connector between the following terminals:
  • Wastegate valve terminal A-PCM terminal 1CF
  • Wastegate valve terminal E-PCM terminal 1BJ

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.
  • If the short to ground circuit could not be detected in the wiring harness:
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 9.
No Go to the next step.
6 INSPECT WASTEGATE VALVE POSITION SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER
  • Verify that the wastegate valve and PCM connectors are disconnected.
  • Inspect for continuity between wastegate valve terminals E 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:
  • Wastegate valve terminal E-PCM terminal 1BJ
  • Wastegate valve terminal C-PCM terminal 1AR

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 9.

No Go to the next step.
7 INSPECT WASTEGATE VALVE POSITION SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT
  • Verify that the wastegate valve and PCM connectors are disconnected.
  • Inspect for continuity between wastegate valve terminal A (wiring harness-side) and PCM terminal 1CF (wiring harness-side).
  • 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 wastegate valve terminal A and PCM terminal 1CF.
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 9.
8 INSPECT WASTEGATE VALVE
POSITION SENSOR
Yes Replace the dynamic pressure turbo (DPT), then go to the next step.
(See DYNAMIC PRESSURE TURBO REMOVAL/INSTALLATION [VIN Y] .)
No Go to the next step.
9 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.
10 VERIFY AFTER REPAIR PROCEDURE Yes Go to the applicable DTC inspection.
(See DTC TABLE .)
No DTC troubleshooting completed.