Chrysler 2005 Crossfire SRT6 Service Manual page 4139

24 - 10 HEATING & AIR CONDITIONING - ELECTRICAL DIAGNOSTICS
LEFT HEATER CORE 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 Left Heater
Core Temperature Sensor Signal circuit.
LEFT HEATER CORE TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
LEFT HEATER CORE TEMPERATURE SENSOR OPEN
LEFT HEATER CORE TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
LEFT HEATER CORE TEMPERATURE SENSOR GROUND OPEN
LEFT HEATER CORE 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 LEFT HEATER CORE TEMPERATURE SENSOR VOLTAGE WITH DRB III
Turn the ignition on.
With the DRB III , read the Left Heater Core Temperature Sensor volt-
age.
Does the DRB III
VOLTS or greater?
Yes >> Go to 2
No >> Go to 6
2.
MEASURE THE VOLTAGE OF THE LEFT HEATER CORE TEMPERATURE SENSOR SIGNAL CIRCUIT
Turn the ignition off.
Disconnect the Heater Core Temperature Sensor harness connector.
Note: Check connector - Clean/repair as necessary.
Turn the ignition on.
Measure the voltage of the Left Heater Core Temperature Sensor Sig-
nal circuit at the Heater Core Temperature Sensor harness connector.
Is the voltage above 5.5 volts?
Yes >> Repair the Left Heater Core Temperature Sensor Signal
circuit for a short to voltage.
Perform BODY VERIFICATION TEST.
No >> Go to 3
POSSIBLE CAUSES
display LEFT HEATER CORE TEMP: 5.0
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