Chrysler Town and Country 2003 Owner's Manual page 434

COMMUNICATION
*NO RESPONSE FROM SENTRY KEY IMMOBILIZER MODULE —
Continued
TEST
5 Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the SKIM harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRBIII . Attach
the red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Set Probe to x10.
Press F2 again when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the SKIM connector.
Turn the ignition on.
Observe the voltage display on the DRBIII Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
Yes → Go To 6
→ Repair the PCI Bus circuit for an open.
No
6 If there are no possible causes remaining, view repair.
Repair
ACTION
Perform SKIS VERIFICATION.
Replace and program the Sentry Key Immobilizer Module in
accordance with the Service Information.
Perform SKIS VERIFICATION.
410
APPLICABILITY
All
All