Response From Pcm (Sci Only) - Dodge ZB 2005 Service Manual

COMMUNICATION
Symptom:
*NO RESPONSE FROM PCM (SCI ONLY)
CHECK PCM POWERS AND GROUNDS
SCI TRANSMIT CIRCUIT SHORTED TO VOLTAGE
TIRE PRESSURE MONITOR 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 C3 harness connector.
Disconnect the DRBIII from the DLC.
Measure the resistance between ground and the SCI Transmit circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 3
→ Go To 4
No
3 Turn the ignition off.
Disconnect the Tire Pressure Monitor Module harness connector (if equipped).
NOTE: If vehicle is not equipped with a Tire Pressure Monitor Module
answer yes to the question.
Measure the resistance between ground and the SCI Transmit circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the SCI Transmit circuit for a short to ground.
→ Replace the Tire Pressure Monitor 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.
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APPLICABILITY
All
All
All