Dodge Caliber. Manual — part 794

3.

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

Turn the ignition on.

Disconnect the Totally Integrated Power Module (TIPM) connector.

Measure the resistance between ground and the (C818) A/C Pressure
Sensor Supply circuit in the A/C Pressure Transducer harness connec-
tor.

Is the resistance above 1000 ohms?

Yes

>> Go to 4

No

>> Repair the (C818) A/C Pressure Sensor Supply circuit for a

short to ground.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

4.

(C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT SHORTED TO (C918) A/C PRESSURE SENSOR
GROUND CIRCUIT

Measure the resistance between the (C818) A/C Pressure Sensor Sup-
ply circuit and the (C918) A/C Pressure Sensor Ground circuit in the
A/C Pressure Transducer harness connector.

Is the resistance above 100 ohms?

Yes

>> Go to 5

No

>> Repair the (C818) A/C Pressure Sensor Supply circuit for a

short to the (C918) A/C Pressure Sensor Ground circuit.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

5.

(C818) A/C PRESSURE SENSOR SUPPLY CIRCUIT OPEN OR HIGH RESISTANCE

Measure the resistance of the (C818) A/C Pressure Sensor Supply cir-
cuit between the A/C Pressure Transducer harness connector and the
Totally Integrated Power Module (TIPM) harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Go to 10

No

>> Repair the (C818) A/C Pressure Sensor Supply circuit for

an open circuit or high resistance.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

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ENGINE ELECTRICAL DIAGNOSTICS - GPEC

9 - 463

6.

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

Turn the ignition off.

Disconnect the Totally Integrated Power Module (TIPM) connector.

Measure the resistance between ground and the (C18) A/C Pressure
Sensor Signal circuit in the A/C Pressure Transducer harness connec-
tor.

Is the resistance above 100 ohms?

Yes

>> Go to 7

No

>> Repair the (C18) A/C Pressure Sensor Signal circuit for a

short to ground.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

7.

(C18) A/C PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO (C918) A/C PRESSURE SENSOR
GROUND CIRCUIT

Measure the resistance between the (C18) A/C Pressure Sensor Signal
circuit and the (C918) A/C Pressure Sensor Ground circuit in the A/C
Pressure Transducer harness connector.

Is the resistance above 100 ohms?

Yes

>> Go to 8

No

>> Repair the (C18) A/C Pressure Sensor Signal circuit for a

short to the (C918) A/C Pressure Sensor Ground circuit.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

8.

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

Measure the resistance of the (C18) A/C Pressure Sensor Signal circuit
between the A/C Pressure Transducer harness connector and the
Totally Integrated Power Module (TIPM) harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Go to 9

No

>> Repair the (C18) A/C Pressure Sensor Signal circuit for an

open circuit or high resistance.

Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).

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ENGINE ELECTRICAL DIAGNOSTICS - GPEC

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9.

AC PRESSURE TRANSDUCER

Turn the ignition off.

Connect the Totally Integrated Power Module (TIPM) connector.

Connect a jumper wire between the (C818) A/C Pressure Sensor Sup-
ply circuit and the (C18) A/C Pressure Sensor Signal circuit in the A/C
Pressure Transducer harness connector.

Turn the ignition on.

With the scan tool, read the AC Pressure Transducer signal voltage.

Is the voltage above 4.5 volts 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 - DIAGNOSIS AND TESTING).

No

>> Go to 10

10.

TOTALLY INTEGRATED POWER MODULE (TIPM)

Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the A/C Pressure Trans-
ducer and the Totally Integrated Power Module (TIPM).

Look for any chafed, pierced, pinched, or partially broken wires.

Look for broken, bent, pushed out or corroded terminals.

Refer to any Technical Service Bulletins that may apply.

Were any problems found?

Yes

>> Repair as necessary.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

No

>> Replace and program the Totally Integrated Power Module (TIPM) in accordance with the Service Infor-

mation.

Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).

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ENGINE ELECTRICAL DIAGNOSTICS - GPEC

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P0533-A/C PRESSURE SENSOR CIRCUIT HIGH

For a complete wiring diagram Refer to Section 8W

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ENGINE ELECTRICAL DIAGNOSTICS - GPEC

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