Chrysler Crossfire. Manual — part 983
A/C PRESSURE SENSOR CIRCUIT (CONTINUED)
2.
MEASURE THE RESISTANCE FROM THE A/C PRESSURE SENSOR SIGNAL CIRCUIT TO THE 5-VOLT
SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Note: Check connector - Clean/repair as necessary.
Disconnect the A/C Heater Control Module harness connector.
Note: Check connector - Clean/repair as necessary.
Measure the resistance from the A/C Pressure Sensor Signal circuit to
the 5-Volt supply circuit at the A/C Pressure Sensor harness connec-
tor.
Is the resistance below 5.0 ohms?
Yes
>> Repair the A/C Pressure Sensor Signal circuit for a short
to the 5-Volt Supply circuit.
Perform BODY VERIFICATION TEST.
No
>> Go to 3
3.
MEASURE THE VOLTAGE ON THE A/C PRESSURE SENSOR SIGNAL CIRCUIT
Turn the ignition on.
Measure the voltage on the A/C Pressure Sensor Signal circuit at the
A/C Pressure Sensor harness connector.
Is the voltage above 5.2 volts?
Yes
>> Repair the A/C Pressure Sensor Signal circuit for a short
to battery voltage.
Perform BODY VERIFICATION TEST.
No
>> Go to 4
4.
MONITOR A/C PRESSURE SENSOR VOLTAGE WITH DRB III
T
Turn the ignition off.
Connect a jumper wire between the A/C Pressure Sensor Signal circuit
and the Sensor ground circuit.
Turn the ignition on.
With the DRB III
T
, monitor the A/C Pressure Sensor voltage.
Is the voltage below 1.0 volt?
Yes
>> Replace the A/C Pressure Sensor. (Refer to 24 - HEAT-
ING & AIR CONDITIONING/CONTROLS/A/C PRESSURE
TRANSDUCER - REMOVAL).
Perform BODY VERIFICATION TEST.
No
>> Go to 5
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HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS
24 - 35
A/C PRESSURE SENSOR CIRCUIT (CONTINUED)
5.
MEASURE THE RESISTANCE OF THE A/C PRESSURE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Measure the resistance of the A/C Pressure Sensor Signal circuit from
the A/C Heater Control Module harness connector to the A/C Pressure
Sensor harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go to 6
No
>> Repair the A/C Pressure Sensor Signal circuit for an open.
Perform BODY VERIFICATION TEST.
6.
MEASURE THE RESISTANCE BETWEEN GROUND AND THE A/C PRESSURE SENSOR GROUND
CIRCUIT
With the ignition off.
Measure the resistance between ground and the A/C Pressure Sensor
Ground circuit at the A/C Pressure Sensor harness connector.
Is the resistance below 30 ohms?
Yes
>> Replace the A/C Heater Control Module. (Refer to 24 -
HEATING & AIR CONDITIONING/CONTROLS/HEATER
CONTROL - REMOVAL).
Perform BODY VERIFICATION TEST.
No
>> Repair the A/C Pressure Sensor ground circuit for an
open.
Perform BODY VERIFICATION TEST.
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HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS
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A/C PRESSURE SENSOR CIRCUIT (CONTINUED)
7.
READ A/C PRESSURE SENSOR VOLTAGE WITH DRB III
T
With the ignition on.
With the DRB III
T
, read the A/C Pressure Sensor voltage.
Is the voltage below 0.5 of a volt?
Yes
>> Go to 8
No
>> The condition that caused this DTC to set is currently not
present. Inspect the related wiring harness for a possible
intermittent condition.
Perform BODY VERIFICATION TEST.
8.
MEASURE THE VOLTAGE OF THE 5-VOLT SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the A/C Pressure Sensor harness connector.
Note: Check connector - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the 5-Volt Supply circuit at the A/C Pressure
Sensor harness connector.
Is the voltage between 4.5 and 5.0 volts?
Yes
>> Go to 9
No
>> Go to 12
9.
MONITOR A/C PRESSURE SENSOR VOLTAGE WITH DRB III
T
With the ignition on.
With the DRB III
T
, monitor the A/C Pressure Sensor voltage.
Is the voltage above 0.5 of a volt?
Yes
>> Replace the A/C Pressure Sensor. (Refer to 24 - HEAT-
ING & AIR CONDITIONING/CONTROLS/A/C PRESSURE
TRANSDUCER - REMOVAL)
Perform BODY VERIFICATION TEST.
No
>> Go to 10
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24 - 37
A/C PRESSURE SENSOR CIRCUIT (CONTINUED)
10.
MEASURE THE RESISTANCE BETWEEN GROUND AND THE A/C PRESSURE SENSOR SIGNAL
CIRCUIT
Turn the ignition off.
Disconnect the A/C Heater Control Module harness connector.
Note: Check connector - Clean/repair as necessary.
Measure the resistance between ground and the A/C Pressure Sensor
Signal circuit in the A/C Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the A/C Pressure Sensor Signal circuit for a short
to ground.
Perform BODY VERIFICATION TEST.
No
>> Go to 11
11.
MEASURE THE RESISTANCE FROM THE A/C PRESSURE SENSOR SIGNAL CIRCUIT TO THE SENSOR
GROUND CIRCUIT
With the ignition off.
Measure the resistance from the A/C Pressure Sensor Signal circuit to
the Sensor Ground circuit at the A/C Pressure Sensor harness con-
nector.
Is the resistance below 100 ohms?
Yes
>> Repair the A/C Pressure Sensor Signal circuit for a short
to the Sensor Ground circuit.
Perform BODY VERIFICATION TEST.
No
>> Replace the A/C Heater Control Module. (Refer to 24 -
HEATING & AIR CONDITIONING/CONTROLS/HEATER
CONTROL - REMOVAL).
Perform BODY VERIFICATION TEST.
12.
MEASURE THE RESISTANCE BETWEEN GROUND AND THE A/C PRESSURE SENSOR 5-VOLT
SUPPLY CIRCUIT
Turn the ignition off.
Disconnect the A/C Heater Control Module harness connector.
Measure the resistance between ground and the 5-Volt Supply circuit
at the A/C Pressure Sensor harness connector.
Is the resistance below 100 ohms?
Yes
>> Repair the 5-Volt Supply circuit for a short to ground.
Perform BODY VERIFICATION TEST.
No
>> Go to 13
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HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS
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