DTC P0533:00

Refrigerant pressure sensor circuit high input

DETECTION CONDITION

• The PCM monitors input voltage from the refrigerant pressure sensor. If the input voltage at the PCM terminal 2AX is above 4.9 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

• PCM connector or terminals malfunction

• Refrigerant pressure sensor malfunction

• Short to power supply in wiring harness between refrigerant pressure sensor terminal B and PCM terminal 2AX

• Open circuit in wiring harness between the following terminals:

• Refrigerant pressure sensor terminal B—PCM terminal 2AX

• Refrigerant pressure sensor terminal C—PCM terminal 2AJ

• PCM malfunction

Item (definition)

Unit/Condition

Definition

Condition/Specification (Reference)

AC_PRES

KPa , mBar , psi, in H20

Refrigerant pressure input from refrigerant pressure sensor

• Displays refrigerant pressure

V

Refrigerant pressure sensor voltage

• Refrigerant pressure is 547 kPa {5.58 kgf/cm², 79.3 psi}: Approx. 0.91 V

• Refrigerant pressure is 757 kPa {7.72 kgf/cm², 110 psi}: Approx. 1.22 V

• Refrigerant pressure is 1.17 MPa {11.9 kgf/cm², 170 psi}: Approx. 1.84 V

STEP

INSPECTION

ACTION

1

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 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

• Access the AC_PRES PID using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Verify the AC_PRES PID value.

• Is the AC_PRES PID value 5 V or B+?

Yes

Go to Step 7.

No

Go to the next step.

4

• 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 10.

No

Go to the next step.

5

• 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 10.

No

Go to the next step.

6

• Reconnect all disconnected connectors.

• Inspect the refrigerant pressure sensor.

  (See REFRIGERANT PRESSURE SENSOR INSPECTION [MANUAL AIR CONDITIONER].)

  (See REFRIGERANT PRESSURE SENSOR INSPECTION [FULL-AUTO AIR CONDITIONER].)

• Is there any malfunction?

Yes

Replace the refrigerant pressure sensor, then go to Step 10.

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

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

No

Go to Step 10.

7

• Switch the ignition off.

• Disconnect the refrigerant pressure sensor connector.

• Access the AC_PRES PID using the M-MDS.

  (See ON-BOARD DIAGNOSTIC TEST [PCM (SKYACTIV-G 2.0)].)

• Verify the AC_PRES PID value.

• Is the AC_PRES PID value 5 V or B+?

Yes

Go to the next step.

No

Go to Step 9.

8

• Verify that the refrigerant pressure sensor connector is disconnected.

• Switch the ignition off.

• Disconnect the PCM connector.

• Inspect for continuity between refrigerant pressure sensor terminal B (wiring harness-side) and PCM terminal 2AX (wiring harness-side).

• Is there continuity?

Yes

Refer to the wiring diagram and verify whether or not there is a common connector between refrigerant pressure sensor terminal B and 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 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 10.

No

Refer to the wiring diagram and verify whether or not there is a common connector between refrigerant pressure sensor terminal B and 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 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 10.

9

• Verify that the refrigerant pressure sensor connector is disconnected.

• Switch the ignition off.

• Disconnect the PCM connector.

• Inspect for continuity between refrigerant pressure sensor terminal C (wiring harness-side) and PCM terminal 2AJ (wiring harness-side).

• Is there continuity?

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

Refer to the wiring diagram and verify whether or not there is a common connector between refrigerant pressure sensor terminal C 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.

10

• Always reconnect all disconnected connectors.

• Clear the DTC from the PCM memory using the M-MDS.

  (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.0)].)

• Perform the KOEO or KOER self test.

  (See KOEO/KOER SELF TEST [PCM (SKYACTIV-G 2.0)].)

• Is the same DTC present?

Yes

Repeat the inspection from Step 1.

• If the malfunction recurs, replace the PCM.

  (See PCM REMOVAL/INSTALLATION [SKYACTIV-G 2.0].)

Go to the next step.

No

Go to the next step.

11

• Perform the “AFTER REPAIR PROCEDURE”.

  (See AFTER REPAIR PROCEDURE [PCM (SKYACTIV-G 2.0)].)

• Are any DTCs present?

Yes

Go to the applicable DTC inspection.

(See DTC TABLE [PCM (SKYACTIV-G 2.0)].)

No

DTC troubleshooting completed.