Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 212

Symptom:

P0533-A/C PRESSURE SENSOR HIGH

When Monitored and Set Condition:

P0533-A/C PRESSURE SENSOR HIGH

When Monitored:

The engine running. The A/C relay energized.

Set Condition:

The A/C pressure sensor signal at the PCM goes above 4.92 volts. One trip

Fault.

POSSIBLE CAUSES

A/C PRESSURE SENSOR VOLTAGE ABOVE 4.6 VOLTS

(C18) A/C PRESSURE SIGNAL CIRCUIT SHORTED TO (K7) 5 VOLT SUPPLY CIRCUIT

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

A/C PRESSURE SENSOR INTERNAL FAILURE

(C18) A/C PRESSURE SIGNAL CIRCUIT OPEN

(K4) SENSOR GROUND CIRCUIT OPEN

PCM

TEST

ACTION

APPLICABILITY

1

NOTE: Ensure the A/C refrigerant System is properly charged per the
Service Information.
Start the engine.
With the DRBIII

t, read the A/C Pressure Sensor voltage.

Is the voltage above 4.6 volts?

All

Yes

→ Go To 2

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

2

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
Measure the resistance between the (C18) A/C Pressure Signal circuit and the (K7)
5 Volt Supply circuit in the A/C Pressure Sensor harness connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the (C18) A/C Pressure Signal circuit for a short to the (K7)

5 Volt Supply circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

No

→ Go To 3

225

DRIVEABILITY - NGC

TEST

ACTION

APPLICABILITY

3

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Turn the ignition on.
Measure the voltage on the (C18) A/C Pressure Sensor Signal circuit at the A/C
Pressure Sensor harness connector.
Is the voltage above 5.2 volts?

All

Yes

→ Repair the (C18) A/C Pressure Signal circuit for a short to battery

voltage.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

No

→ Go To 4

4

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Connect a jumper wire between the (C18) A/C Pressure Signal circuit and the (K4)
Sensor ground circuit.
With the DRBIII

t, monitor the A/C Pressure Sensor voltage.

Turn the ignition on.
Is the voltage below 1.0 volt?

All

Yes

→ Replace the A/C Pressure Sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

No

→ Go To 5

5

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (C18) A/C Pressure Sensor Signal circuit from the A/C
Pressure Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 6

No

→ Repair the (C18) A/C Pressure Signal circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

6

Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Disconnect the PCM harness connector.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the (K4) Sensor ground circuit from the A/C Pressure
Sensor harness connector to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 7

No

→ Repair the (K4) Sensor ground circuit for an open.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

226

DRIVEABILITY - NGC

P0533-A/C PRESSURE SENSOR HIGH —

Continued

TEST

ACTION

APPLICABILITY

7

NOTE: Before continuing, check the PCM harness connector terminals for
corrosion, damage, or terminal push out. Repair as necessary.
If there are no possible causes remaining, view repair.

All

Repair

Replace and program the Powertrain Control Module in accor-
dance with the Service Information.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

227

DRIVEABILITY - NGC

P0533-A/C PRESSURE SENSOR HIGH —

Continued

Symptom:

P0551-POWER STEERING SWITCH PERFORMANCE

When Monitored and Set Condition:

P0551-POWER STEERING SWITCH PERFORMANCE

When Monitored:

Engine running. Vehicle speed at 50 MPH (80.5 KMh) or greater.

Coolant temperature above 20°C (68°F).

Set Condition:

The power steering pressure switch remains open for 40 seconds or

greater while both the vehicle speed is at 50 MPH (80.5 KMh) and the engine coolant
temperature above 20°C (68°F). Two trip fault.

POSSIBLE CAUSES

GOOD TRIP COUNTER = 0

POWER STEERING PRESSURE SWITCH (Z1) GROUND CIRCUIT OPEN

(K10) PSP SWITCH SIGNAL CIRCUIT SHORTED TO GROUND

(K10) PSP SWITCH SIGNAL CIRCUIT OPEN

POWER STEERING PRESSURE SWITCH

PCM

TEST

ACTION

APPLICABILITY

1

Ignition on, engine not running.
With the DRBIII

t, read DTCs and record the related Freeze Frame data.

Is the Good Trip Counter displayed and equal to zero?

All

Yes

→ Go To 2

No

→ Refer to the INTERMITTENT CONDITION symptom in the

Driveability category.
Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

2

Turn the ignition off.
Disconnect the Power Steering Pressure Switch harness connector.
Measure the resistance between Ground and the PSP Switch (Z1) ground circuit at
the Power Steering Pressure Switch connector.
Is the resistance below 5.0 ohms?

All

Yes

→ Go To 3

No

→ Repair the open in the PSP Switch (Z1) ground circuit.

Perform POWERTRAIN VERIFICATION TEST VER - 2 - NGC.

228

DRIVEABILITY - NGC