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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 P0532; PCM REFRIGERANT PRESSURE SENSOR CIRCUIT LOW 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 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.
2 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 8.
No Go to the next step.
3 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 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.

    If the short to ground circuit could not be detected in the wiring harness:

  • Replace the PCM (short to ground in the PCM internal circuit). (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0, SKYACTIV-G 2.5] .)

Go to Step 8.
No Go to the next step.
4 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 8.
No Go to the next step.
5 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 8.
No Go to the next step.
6 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 8.
7 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.
8 VERIFY DTC TROUBLESHOOTING COMPLETED Yes Repeat the inspection from Step 1.
Go to the next step.
No Go to the next step.
9 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.
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