Chrysler Town and Country 2003 Owner's Manual page 633

IGNITION RUN OUTPUT SHORT —
TEST
2 NOTE: Repeat this test until either the DTC is no longer present or all of the
modules and components are disconnected from the Fused Ignition Switch
Output (Run) circuit and the DTC is still present.
Turn the ignition off.
Verify which of these modules and components are used on the vehicle you are
diagnosing: HVAC (ATC or MTC); Rear ATC Control Switch; IP Switch Bank; Auto
Daylight Mirror; Overhead Console; Heated Seat Module (Driver/Pass); Controller
Antilock Brake.
NOTE: For the result of this test to be valid, disconnect only one module or
component at a time and then verify if the DTC is still present.
Using the wiring diagram/schematic as a guide, disconnect the harness connector
with the Fused Ignition Switch Output (Run) circuit from one module or component
identified above.
NOTE: Check connectors - Clean/repair as necessary.
Turn the ignition on.
With the DRBIII in Body Computer, erase BCM DTCs.
Cycle the ignition form ON to OFF.
Start the engine.
With the DRBIII in Body Computer, read BCM DTCs.
Does the DRBIII display IGNITION RUN OUTPUT SHORT?
Yes (All Modules/Components Disconnected
→ Replace the module or the component that when disconnected did
No
3 NOTE: All modules and components identified in Test Number 2 must be
disconnected from the BCM's Fused Ignition Switch Output (Run) circuit
and the DTC must still be present for the result of this test to be valid.
Turn the ignition off.
Disconnect the Body Control Module (BCM) C3 and C4 harness connectors.
Measure the resistance between ground and the Fused Ignition Switch Output (Run)
circuits in the BCM C3 harness connector.
Measure the resistance between ground and the Fused Ignition Switch Output (Run)
circuit in the BCM C4 harness connector.
Is the resistance below 10K ohms on any of the circuits?
Yes → Repair the Fused Ignition Switch Output (Run) circuit(s) with a
→ Replace the Body Control Module (BCM) in accordance with the
No
ACTION
Go To 3
not reset the DTC in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
resistance below 10K ohms for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
service information.
Perform BODY VERIFICATION TEST - VER 1.
IGNITION, POWER, ACCESSORY
Continued
609
APPLICABILITY
All
All