Chrysler 300M 2002 Service Manual page 2195

OVERHEAD CONSOLE
Symptom:
*TEMPERATURE DISPLAY INOPERATIVE OR WRONG
AMBIENT TEMPERATURE SENSOR
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO VOLTAGE
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT OPEN
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND
AMBIENT TEMPERATURE SENSOR SIGNAL CIRCUIT SHORT TO GROUND CIRCUIT
AMBIENT TEMPERATURE SENSOR GROUND CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
COMPASS/MINI-TRIP COMPUTER
TEST
1 NOTE: Ensure that the CMTC is communicating on the PCI Bus before
proceeding with this test.
NOTE: The Ambient Temperature Sensor is hardwired to the PCM. Ambient
temperature information is transmitted to the CMTC via the PCI Bus.
Turn the ignition off.
Disconnect the Ambient Temperature Sensor harness connector.
Measure the resistance of the Ambient Temperature Sensor using the following
temperature/resistance values:
10°C (50°F) Sensor Resistance = 17.99 - 21.81 Kilohms
20°C (68°F) Sensor Resistance = 11.37 - 13.61 Kilohms
25°C (77°F) Sensor Resistance = 9.12 - 10.88 Kilohms
30°C (86°F) Sensor Resistance = 7.37 - 8.75 Kilohms
40°C (104°F) Sensor Resistance = 4.90 - 5.75 Kilohms
50°C (122°F) Sensor Resistance = 3.33 - 3.88 Kilohms
Is the Ambient Temperature Sensor resistance measurement between the min/max
specifications?
Yes → Go To 2
No
POSSIBLE CAUSES
ACTION
→ Replace the Ambient Temperature Sensor. NOTE: After any
repair for an Ambient Temperature Sensor problem, the vehicle
must be driven over 5 kilometers (3 miles) above 40 km/h (25
MPH) to update the CMTC display.
Perform BODY VERIFICATION TEST - VER 1.
472
APPLICABILITY
All