No Response From Pcm (Sci Only) - Sbec - Chrysler Town and Country 2003 Owner's Manual

COMMUNICATION
Symptom:

*NO RESPONSE FROM PCM (SCI ONLY) - SBEC

CHECK PCM POWERS AND GROUNDS
SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE
TRANSMISSION CONTROL MODULE
SCI RECEIVE CIRCUIT SHORTED TO VOLTAGE
SCI CIRCUITS SHORTED TOGETHER
SCI TRANSMIT CIRCUIT SHORTED TO GROUND
SCI RECEIVE CIRCUIT SHORTED TO GROUND
SCI RECEIVE CIRCUIT OPEN
SCI TRANSMIT CIRCUIT OPEN
POWERTRAIN CONTROL MODULE
TEST
1 Perform the symptom Checking PCM Power and Ground Circuits in the Driveability
category.
NOTE: With the DRBIII in the generic scan tool mode, attempt to commu-
nicate with the PCM.
NOTE: If the DRBIII can communicate with the PCM in the generic scan
tool mode, it may not be necessary to perform this step.
Did the vehicle pass this test?
Yes → Go To 2
→ Repair as necessary.
No
2 Turn the ignition off.
Disconnect the PCM C2 harness connector.
Disconnect the DRB from the DLC.
Measure the resistance between ground and the SCI Transmit (PCM) circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 3
→ Go To 4
No
3 Turn the ignition off.
Disconnect the TCM harness connector (if equipped).
NOTE: If vehicle is not equipped with a TCM, answer yes to the question.
Measure the resistance between ground and the SCI Transmit (PCM) circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the SCI Transmit (PCM) circuit for a short to ground.
→ Replace the Transmission Control Module in accordance with the
No
POSSIBLE CAUSES
ACTION
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
service information.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
396
APPLICABILITY
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All
All