Chrysler 2005 Crossfire SRT6 Service Manual page 4133

24 - 4 HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS
AMBIENT TEMPERATURE SENSOR CIRCUIT (CONTINUED)
When Monitored and Set Condition
• When Monitored: With the ignition on.
• Set Condition: The A/C Heater Control Module reports an abnormally high or low voltage that is detected by
the Instrument Cluster on the Ambient Temperature Sensor Signal circuit.
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
AMBIENT TEMPERATURE SENSOR OPEN
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
AMBIENT TEMPERATURE SENSOR GROUND CIRCUIT OPEN
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
INSTRUMENT CLUSTER
For a complete HVAC Circuit Diagram, (Refer to 24 - HEATING & AIR CONDITIONING - SCHEMATICS AND DIA-
GRAMS).
Diagnostic Test
1.
READ AMBIENT TEMPERATURE SENSOR VOLTAGE WITH DRB III
Turn the ignition on.
With the DRB III , read the Ambient Temperature Sensor voltage.
Does the DRB III
greater?
Yes >> Go to 2
No >> Go to 6
2.
MEASURE THE VOLTAGE OF THE AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Note: Check connector - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Ambient Temperature Sensor Signal circuit
at the Ambient Temperature Sensor harness connector.
Is the voltage above 5.5 volts?
Yes >> Repair the Ambient Temperature Sensor Signal circuit for
a short to voltage.
Perform BODY VERIFICATION TEST.
No >> Go to 3
POSSIBLE CAUSES
display AMBIENT TEMP: 5.0 VOLTS or
ZH