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Home >> Mazda >> 2021 >> CX-30 Turbo Premium >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (On-Board Diagnostic - Engine Control System (3 Of 4)) >> DTC P2518-00: Refrigerant Pressure Sensor No. 2 Circuit High Input >> Diagnostic Procedure

Diagnostic Procedure

WARNING: This page is about a different car, the 2020 Mazda CX-30. However, it is still accessible from the selected car via links, so may be relevant.
DTC P2518:00 (PCM, SKYACTIV-G) DIAGNOSTIC PROCEDURE

Step Inspection Results Action
1 RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION
  • Record the freeze frame data/snapshot data.
    NOTE:
    • Recording can be facilitated using the screen capture function of the PC.
 - Go to the next step.
2 VERIFY RELATED REPAIR INFORMATION OR SERVICE INFORMATION AVAILABILITY
  • Verify related Service Bulletins, on-line repair information, or Service Information availability.
  • Is any related Information available?
 Yes Perform repair or diagnosis according to the available information.
  • If the vehicle is not repaired, go to the next step.
No Go to the next step.
3 DETERMINE IF REFRIGERANT PRESSURE SENSOR No. 2 OR WIRING HARNESS MALFUNCTION
  • Access the A/C_PRES_AFT_COMP PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .)
  • Verify the A/C_PRES_AFT_COMP PID value.
  • Is the A/C_PRES_AFT_COMP PID value 5 V or B+?
 Yes Go to Step 7.
No Go to the next step.
4 INSPECT REFRIGERANT PRESSURE SENSOR No. 2 CONNECTOR FOR MALFUNCTION
  • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION .)
  • Are the connector and terminal normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
5 INSPECT PCM CONNECTOR FOR MALFUNCTION
  • Inspect the applicable connector and terminal. (See CONNECTOR INSPECTION .)
  • Are the connector and terminal normal?
 Yes Go to the next step.
No Repair or replace the malfunctioning location and perform the repair completion verification.
6 INSPECT REFRIGERANT PRESSURE SENSOR No. 2 FOR MALFUNCTION
 Yes Go to repair completion verification.
No Repair or replace the malfunctioning location and perform the repair completion verification.
(See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (US)] .)
(See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (US)] .)
 
7 DETERMINE IF REFRIGERANT PRESSURE SENSOR No. 2 SIGNAL CIRCUIT OR REFRIGERANT PRESSURE SENSOR No. 2 GROUND CIRCUIT MALFUNCTION
  • Switch the ignition off.
  • Disconnect the refrigerant pressure sensor No. 2 connector.
  • Access the A/C_PRES_AFT_COMP PID using the M-MDS. (See PID/DATA MONITOR INSPECTION .)
  • Verify the A/C_PRES_AFT_COM P PID value.
  • Is the A/C_PRES_AFT_COMP PID value 5 V or B+?
 Yes Go to the next step.
No Go to Step 9.
8 INSPECT REFRIGERANT PRESSURE SENSOR No. 2 SIGNAL CIRCUIT FOR OPEN CIRCUIT
  • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION .)
  • Is the circuit normal?
 Yes Inspect the signal circuit for a short to power supply.
(See CIRCUIT INSPECTION .)
  • Repair or replace the malfunctioning location and perform the repair completion verification.
No Repair or replace the malfunctioning location and perform the repair completion verification.
9 INSPECT REFRIGERANT PRESSURE SENSOR No. 2 GROUND CIRCUIT FOR OPEN CIRCUIT
  • Inspect the applicable circuit for open circuit. (See CIRCUIT INSPECTION .)
  • Is the circuit normal?
 Yes Replace the refrigerant pressure sensor No. 2 and perform the repair completion verification.
(See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER (US)] .) (See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER (US)] .)
No Repair or replace the malfunctioning location and perform the repair completion verification.
Repair completion verification 1 VERIFY THAT VEHICLE IS REPAIRED
  • Install/connect the part removed/disconnected during the troubleshooting procedure.
  • Clear the DTC recorded in the memory. (See CLEARING DTC .)
  • Replicate the vehicle conditions at the time the DTC was detected using the following procedure.
  • Perform the DTC inspection for the PCM. (See DTC INSPECTION .)
  • Is the same Pending DTC present?
 Yes Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW (US) .)
If the CAN communication is normal, perform the diagnosis from Step 1.
No Go to the next step.
Repair completion verification 2 VERIFY IF OTHER DTCs DISPLAYED
  • Perform the DTC inspection. (See DTC INSPECTION .)
  • Are any other DTCs displayed?
 Yes Repair the malfunctioning location according to the applicable DTC troubleshooting.
No DTC troubleshooting completed.
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