Dodge ZB 2005 Service Manual page 1142

*PCI BUS COMMUNICATION FAILURE —
TEST
4 NOTE: Reconnect the PCM harness connector and the negative battery
cable.
Turn the ignition on.
Measure the voltage of the PCI Bus circuit at the Data Link Connector (DLC).
Is the voltage above 7.0 volts?
Yes → Go To 5
No
5 Turn the ignition off.
Using a voltmeter, connect one end to the PCI Bus circuit at the DLC, and the other
end to ground.
Note: When performing the next step turn the ignition off (wait one minute)
before disconnecting any module. When the module is disconnected turn
the ignition on to check for a short to voltage.
Turn the ignition on.
While monitoring the voltmeter, disconnect each module the vehicle is equipped with
one at a time.
Is the voltage steadily above 7.0 volts with all the modules disconnected?
Yes → Repair the PCI Bus circuit for a short to voltage.
No
6 Turn the ignition off.
Disconnect the negative battery cable.
Using a ohmmeter, connect one end to the PCI Bus circuit at the DLC, and the other
end to ground.
While monitoring the ohmmeter, disconnect each module the vehicle is equipped with
one at a time.
NOTE: Total bus resistance to ground thru all of the modules is typically
between 350 to 1000 ohms. The more modules on the bus, the lower the total
bus resistance will be.
Is the resistance below 150.0 ohms with all the modules disconnected?
Yes → Repair the PCI Bus circuit for a short to ground.
No
ACTION
→ Go To 6
Perform BODY VERIFICATION TEST - VER 1.
→ Replace the module that when disconnected the short to voltage
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
→ Replace the module that when disconnected the short to ground
was eliminated.
Perform BODY VERIFICATION TEST - VER 1.
Continued
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COMMUNICATION
APPLICABILITY
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All
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