DaimlerChrysler Jeep Grand Cherokee 2002, Service Manual

Page: 23 / 284

Symptom:
*PCI BUS COMMUNICATION FAILURE
POSSIBLE CAUSES
WITH THE DRB PERFORM A MODULE SCAN
OPEN PCI BUS CIRCUIT AT THE DATA LINK CONNECTOR
USING THE DRB, PERFORM THE PCI BUS CONTROL MODE
DISCONNECT THE MODULE(S) HARNESS CONNECTOR
PCI BUS CIRCUIT SHORTED TO VOLTAGE
DISCONNECT THE MODULE(S) HARNESS CONNECTOR
PCI BUS CIRCUIT SHORTED TO GROUND
WIRING HARNESS INTERMITTENT FAILURE
TEST ACTION APPLICABILITY
1 Note: Determine which modules this vehicle is equipped with before begin-
ning.
Connect the Diagnostic Junction Port Tester #8339 to the DRB and to the Diagnostic
Junction Port.
Using the DRB, along with the Diagnostic Junction Port Tester #8339, select
Junction Port Tool then PCI Bus Module Scan and follow the instructions on the
DRB.
Was the DRB able to scan (I/D or communicate) with any modules? All
Yes
→
Refer to the Communication category for the related symptom(s).
(Individual module no responses).
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To 2
2 Turn the ignition off.
Measure the resistance of the PCI Bus circuit between the Data Link Connector and
the Diagnostic Junction Port connector.
Is the resistance below 5.0 ohms? All
Yes
→
Go To 3
No
→
Repair the PCI Bus circuit for an open between the DLC and the
Diagnostic Junction Port.
Perform BODY VERIFICATION TEST - VER 1.
15
COMMUNICATION
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