P0533-A/C PRESSURE SENSOR CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W

When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
Set Condition:
The PCM detects that the A/C Pressure Sensor input voltage is above the maximum acceptable value.

Possible Causes

INTERMITTENT DTC

(C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE

(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT

(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

(C918) A/C PRESSURE SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

A/C PRESSURE TRANSDUCER

TOTALLY INTEGRATED POWER MODULE (TIPM)

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

Diagnostic Test

1.DTC IS ACTIVE

NOTE: Diagnose and repair any system voltage or sensor reference voltage DTCs before continuing with this test.

WARNING: When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts, or fan. Do not wear loose clothing. Failure to follow these instructions can result in personal injury or death.

Is the status Active for this DTC?

Yes

Go To 2

Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)

2.(C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO VOLTAGE

Is there any voltage present?

Yes

Repair the (C818) A/C Pressure Sensor Supply circuit for a short to voltage.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 3

3.(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO VOLTAGE

Is there any voltage present?

Yes

Repair the (C18) A/C Pressure Sensor Signal circuit for a short to voltage.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 4

4.(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO THE (C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT

Is the resistance below 100 ohms?

Yes

Repair the (C18) A/C Pressure Sensor Signal circuit for a short to the (C818) A/C Pressure Sensor Supply circuit.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 5

5.(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 6

Repair the (C18) A/C Pressure Sensor Signal for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

6.(C918) A/C PRESSURE SENSOR GROUND CIRCUIT OPEN OR HIGH RESISTANCE

Is the resistance below 5.0 ohms?

Yes

Go to 7

Repair the (C918) A/C Pressure Sensor Ground circuit for an open circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

7.A/C PRESSURE TRANSDUCER

Is the voltage below 1.0 volt with the jumper wire in place?

Yes

Replace the A/C Pressure Transducer in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Go to 8

8.TOTALLY INTEGRATED POWER MODULE (TIPM)

Were any problems found?

Yes

Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).

Replace and program the Totally Integrated Power Module (TIPM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - STANDARD PROCEDURE).