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DTC P0532:00 [PCM (SKYACTIV-G 2.0)]

DTC P0532:00

Refrigerant pressure sensor circuit low input

DETECTION CONDITION

  • The PCM monitors input voltage from the refrigerant pressure sensor. If the input voltage at the PCM terminal 2AX is below 0.1 V for 5 s, the PCM determines that the refrigerant pressure sensor circuit has a malfunction.

    Diagnostic support note

  • This is a continuous monitor (other).

  • The check engine light does not illuminate.

  • FREEZE FRAME DATA is not available.

  • Snapshot data is available.

  • DTC is stored in the PCM memory.

FAIL-SAFE FUNCTION

Not applicable

POSSIBLE CAUSE

  • Refrigerant pressure sensor connector or terminals malfunction

  • Short to ground in wiring harness between the following terminals:

    • Refrigerant pressure sensor terminal A—PCM terminal 2BB

    • Refrigerant pressure sensor terminal B—PCM terminal 2AX

  • PCM connector or terminals malfunction

  • Refrigerant pressure sensor signal circuit and ground circuit are shorted to each other

  • Open circuit in wiring harness between refrigerant pressure sensor terminal A and PCM terminal 2BB

  • Refrigerant pressure sensor malfunction

  • PCM malfunction

Diagnostic Procedure

STEP

INSPECTION

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 REFRIGERANT PRESSURE SENSOR CONNECTOR CONDITION

  • Switch the ignition off.

  • Disconnect the refrigerant 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 9.

No

Go to the next step.

4

 INSPECT REFRIGERANT PRESSURE SENSOR CIRCUIT FOR SHORT TO GROUND

  • Verify that the refrigerant pressure sensor connector is disconnected.

  • Inspect for continuity between the following terminals (wiring harness-side) and body ground:

    • Refrigerant pressure sensor terminal A

    • Refrigerant pressure sensor terminal B

  • 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:

      • Refrigerant pressure sensor terminal A—PCM terminal 2BB

      • Refrigerant pressure sensor terminal B—PCM terminal 2AX

        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 9.

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 REFRIGERANT PRESSURE SENSOR SIGNAL CIRCUIT AND GROUND CIRCUIT FOR SHORT TO EACH OTHER

  • Verify that the refrigerant pressure sensor and PCM connectors are disconnected.

  • Inspect for continuity between refrigerant pressure sensor terminals B 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:

  • Refrigerant pressure sensor terminal B—PCM terminal 2AX

  • Refrigerant pressure sensor terminal C—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 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 REFRIGERANT PRESSURE SENSOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT

  • Verify that the refrigerant pressure sensor and PCM connectors are disconnected.

  • Inspect for continuity between refrigerant pressure sensor terminal A (wiring harness-side) and PCM terminal 2BB (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 refrigerant 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 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 REFRIGERANT PRESSURE SENSOR

Yes

Replace the refrigerant pressure sensor, then go to the next step.

(See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [MANUAL AIR CONDITIONER].)

(See REFRIGERANT PRESSURE SENSOR REMOVAL/INSTALLATION [FULL-AUTO AIR CONDITIONER].)

No

Go to the next step.

9

 VERIFY DTC TROUBLESHOOTING COMPLETED

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 [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.
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Free to use workshop manual for your 2015+ Mk4 'ND' Mazda MX-5

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