Chrysler Town and Country 2003 Owner's Manual page 976

VEHICLE THEFT/SECURITY
INTERNAL ULTRASONIC FAULT (EXPORT ONLY) —
TEST
7 Turn the ignition off.
Measure the resistance of the Sensor Ground circuit at the Rear Intrusion Sensor
connector.
Is the resistance below 5.0 ohms?
Yes → Go To 8
→ Go To 9
No
8 Replace the Rear Intrusion Sensor with a known good sensor.
With the DRBIII , select Intrusion Sensor Test.
Turn the ignition on then wave arm inside the vehicle to simulate an intrusion.
Does the DRBIII show INTRUSION DETECTED?
Yes → Replace the Rear Intrusion Sensor.
→ Replace the RKE/Thatcham Alarm Module.
No
9 Gain access to the RKE/Thatcham Alarm Module.
Disconnect the Thatcham Alarm Module 16-way connector.
Measure the resistance of the Sensor Ground circuit between the Thatcham Alarm
Module connector and the Intrusion Sensor connector.
Is the resistance below 5.0 ohms?
Yes → Replace the RKE/Thatcham Alarm Module.
→ Repair the Rear Sensor Ground circuit for an open.
No
10 Turn the ignition off.
Gain access to the RKE/Thatcham Alarm Module 16-way connector.
While back probing, measure the voltage of the Rear Intrusion Sensor Signal circuit
at the Thatchem Alarm Module 16-way connector.
Turn the ignition on while observing the voltmeter.
NOTE: Voltage will only be present during the first 6 seconds when the
ignition is turned on.
Is the voltage above 10.0 volts when the ignition is initially turned on?
Yes → Repair the Rear Intrusion Sensor Signal circuit for an open.
→ Replace the RKE/Thatcham Alarm Module.
No
11 Gain access to the RKE/Thatcham Alarm Module.
Disconnect the Thatcham Alarm Module 16-way connector.
Measure the resistance of the Sensor Ground circuit between the Thatcham Alarm
Module connector and the Front Intrusion Sensor connector.
Is the resistance below 5.0 ohms?
Yes → Replace the RKE/Thatcham Alarm Module.
→ Repair the Front Sensor Ground circuit for an open.
No
ACTION
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
Perform VTSS VERIFICATION TEST - 1A.
952
Continued
APPLICABILITY
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