Chrysler Pacifica CS 2004 Service Manual page 26

COMMUNICATION
*NO RESPONSE FROM PCM (PCM SCI ONLY) —
TEST
4 Turn the ignition off.
Disconnect the DRBIII from the DLC.
Disconnect the PCM harness connectors.
Measure the resistance between the SCI Transmit (PCM) circuit and the SCI Receive
(PCM) circuit at the Data Link harness connector (cavs 7 and 12).
Is the resistance below 5.0 ohms?
Yes → Repair the short between the SCI Transmit (PCM) and the SCI
→ Go To 5
No
5 Turn the ignition off.
Disconnect the PCM harness connectors.
Disconnect the DRBIII from the DLC.
Measure the resistance between ground and the SCI Transmit (PCM) circuit at the
Data Link harness connector (cav 7).
Is the resistance below 5.0 ohms?
Yes → Repair the SCI Transmit (PCM) circuit for a short to ground.
→ Go To 6
No
6 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII from the DLC.
Measure the resistance between ground and the SCI Receive (PCM) circuit in the
Data Link harness connector (cav 12).
Is the resistance below 5.0 ohms?
Yes → Repair the SCI Receive (PCM) circuit for a short to ground.
→ Go To 7
No
7 Turn the ignition off.
Disconnect the PCM harness connector.
Disconnect the DRBIII from the DLC.
CAUTION: DO NOT PROBE THE PCM HARNESS CONNECTORS. PROBING
THE PCM HARNESS CONNECTORS WILL DAMAGE THE PCM TERMI-
NALS RESULTING IN POOR TERMINAL TO PIN CONNECTION. INSTALL
MILLER SPECIAL TOOL #8815 TO PERFORM DIAGNOSIS.
Measure the resistance of the SCI Receive (PCM) circuit from the Data Link harness
connector (cav 12) to the appropriate terminal of special tool #8815.
Is the resistance below 5.0 ohms?
Yes → Go To 8
→ Repair the SCI Receive (PCM) circuit for an open.
No
ACTION
Receive (PCM) circuits.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
Continued
20
APPLICABILITY
All
All
All
All