Pinpoint Test A: P0532, P0533

WARNING: This page is about a different car, the 2023 Ford Bronco. However, it is still accessible from the selected car via links, so may be relevant.

Refer To MANUAL CLIMATE CONTROL SYSTEM for Schematic And Connector Information.

Normal Operation and Fault Conditions

A/C Pressure Transducer, REFER to: Climate Control System - Vehicles With: Electronic Manual Temperature Control (EMTC) - System Operation and Component Description .

DTC Fault Trigger Conditions

DTC	Description	Fault Trigger Condition
PCM P0532:00	A/C Refrigerant Pressure Sensor 'A' Circuit Low: No Sub Type Information	The A/C pressure transducer inputs a feedback voltage to the PCM. This DTC sets if the feedback voltage is lower than expected.
PCM P0533:00	A/C Refrigerant Pressure Sensor 'A' Circuit High: No Sub Type Information	The A/C pressure transducer inputs a feedback voltage to the PCM. This DTC sets if the feedback voltage is greater than expected.

Possible Sources

Wiring, terminals or connectors
A/C pressure transducer
PCM

Visual Inspection and Pre-checks

Inspect for loose or corroded A/C pressure transducer connections.

NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.

A1 COMPARE THE PCM (POWERTRAIN CONTROL MODULE) PRESSURE SENSOR (ACP_PRESS) PID (PARAMETER IDENTIFICATION) WITH THE MANIFOLD GAUGE SET READINGS

NOTE: The following pinpoint test step is tested in ambient temperature of approximately 21.1°C (70°F). As ambient temperatures near 38°C (100.4°F), the pressure value difference increases above +/- 15 psi (103 kPa) range

Allow the A/C system to stabilize to the outside ambient temperature. This can take a soak period of at least 6 hours.

Connect the manifold gauge set.

Ignition ON.

Access the PCM and monitor the ACP_PRESS (kPa) PID

With the manifold gauge set connected, compare the pressure readings of the manifold gauge set and the PCMPID.

Are the pressure values of the manifold gauge set and the ACP_PRESS PCMPID, dependent upon the ambient temperatures, within +/- 103 kPa (15 psi)?

Yes	If refrigerant pressures are low, INSPECT the A/C system for a leak. GO to Pinpoint Test AJ IGNORE the Diagnostic Trouble Codes (DTCs). REFER to Symptom Chart .

GO to A2

A2 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.

Disconnect PCM C175B (2.3L) or C1551B (2.7L).

Disconnect A/C pressure transducer C1062.

Ignition ON.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1062 Pin 1	Courtesy of FORD MOTOR COMPANY	Ground
C1062 Pin 2	Courtesy of FORD MOTOR COMPANY	Ground
C1062 Pin 3	Courtesy of FORD MOTOR COMPANY	Ground

Is any voltage present?

Yes	REPAIR the circuit.

GO to A3

A3 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1062 Pin 1	Courtesy of FORD MOTOR COMPANY	Ground
C1062 Pin 2	Courtesy of FORD MOTOR COMPANY	Ground
C1062 Pin 3	Courtesy of FORD MOTOR COMPANY	Ground

Are the resistances greater than 10, 000 ohms?

Yes

GO to A4

No	REPAIR the circuit.

A4 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR AN OPEN

Measure:

2.3L

Positive Lead	Measurement / Action	Negative Lead
C1062 Pin 1	Courtesy of FORD MOTOR COMPANY	C175B Pin 124
C1062 Pin 2	Courtesy of FORD MOTOR COMPANY	C175B Pin 26
C1062 Pin 3	Courtesy of FORD MOTOR COMPANY	C175B Pin 114

2.7L

Positive Lead	Measurement / Action	Negative Lead
C1062 Pin 1	Courtesy of FORD MOTOR COMPANY	C1551B Pin 81
C1062 Pin 2	Courtesy of FORD MOTOR COMPANY	C1551B Pin 51
C1062 Pin 3	Courtesy of FORD MOTOR COMPANY	C1551B Pin 84

Are the resistances less than 3 ohms?

Yes

GO to A5

No	REPAIR the circuit.

A5 CHECK THE A/C (AIR CONDITIONING) PRESSURE SENSOR CIRCUITS FOR A SHORT TOGETHER

Measure:

Positive Lead	Measurement / Action	Negative Lead
C1062 Pin 1	Courtesy of FORD MOTOR COMPANY	C1062 Pin 2
C1062 Pin 1	Courtesy of FORD MOTOR COMPANY	C1062 Pin 3
C1062 Pin 2	Courtesy of FORD MOTOR COMPANY	C1062 Pin 3

Are the resistances greater than 10, 000 ohms?

Yes	INSTALL a new A/C pressure transducer. REFER to: Air Conditioning (A/C) Pressure Transducer - 2.3L EcoBoost (199kW/270PS) . CLEAR all Diagnostic Trouble Codes (DTCs). CARRY OUT the PCM self-test. TEST the system for normal operation. If the concern is still present, GO to A6

No	REPAIR the circuits.

A6 CHECK FOR CORRECT PCM (POWERTRAIN CONTROL MODULE) OPERATION

Ignition OFF.

Disconnect and inspect all PCM electrical connectors (if not previously disconnected).

Repair:
- corrosion (install new connector or terminal - clean module pins)
- damaged or bent pins - install new terminals or pins
- pushed-out pins - install new pins as necessary

Connect all PCM electrical connectors. Make sure they seat and latch correctly.

Operate the system and determine if the concern is still present.

Is the concern still present?

Yes

CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA. If a service article exists for this concern, DISCONTINUE this test and FOLLOW the service article instructions. If no service articles address this concern, INSTALL a new PCM. Refer to POWERTRAIN CONTROL MODULE (PCM) - 2.3L EcoBoost (199kW 270PS) , or refer to POWERTRAIN CONTROL MODULE (PCM) - 2.7L EcoBoost (238kW 324PS) , or refer to POWERTRAIN CONTROL MODULE (PCM) - 3.0L EcoBoost (299kW 406PS) (DD) .

No	The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. ADDRESS the root cause of any connector or pin issues.