Chrysler 2005 Crossfire SRT6 Service Manual page 4151

24 - 22 HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS
EVAPORATOR TEMPERATURE SENSOR CIRCUIT (CONTINUED)
When Monitored and Set Condition
• When Monitored: With the ignition on.
• Set Condition: The A/C Heater Control Module detects an abnormally high or low voltage on the Evaporator
Temperature Sensor Signal circuit.
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
EVAPORATOR TEMPERATURE SENSOR OPEN
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
EVAPORATOR TEMPERATURE SENSOR GROUND OPEN
EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
A/C HEATER CONTROL MODULE
For a complete HVAC Circuit Diagram, (Refer to 24 - HEATING & AIR CONDITIONING - SCHEMATICS AND DIA-
GRAMS).
Diagnostic Test
1.
READ EVAPORATOR TEMPERATURE SENSOR VOLTAGE WITH DRB III
Turn the ignition on.
With the DRB III , read the Evaporator Temperature Sensor voltage.
Does the DRB III display EVAP TEMP: 5.0 VOLTS or greater?
Yes >> Go to 2
No >> Go to 6
2.
MEASURE THE VOLTAGE OF THE EVAPORATOR TEMPERATURE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the Evaporator Temperature Sensor harness connector.
Note: Check connector - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Evaporator Temperature Sensor Signal cir-
cuit at the Evaporator Temperature Sensor harness connector.
Is the voltage above 5.5 volts?
Yes >> Repair the Evaporator Temperature Sensor Signal circuit
for a short to voltage.
Perform BODY VERIFICATION TEST.
No >> Go to 3
POSSIBLE CAUSES
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