Chrysler PT Cruiser 2001 Service Manual Supplement page 2498

COMMUNICATION
Symptom:
*BUS +/- SIGNALS OPEN FROM SKIM
SKIM RESPONSE FAILURE
DRB DOES NOT COMMUNICATE WITH SKIM
SKIM FUSED B(+) OPEN
SKIM FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
SKIM GROUND CIRCUIT OPEN
PCI BUS OPEN CIRCUIT TO SKIM
TEST
1 Turn the ignition on.
Using the DRB, attempt to communicate with the SKIM.
Did you communicate with the SKIM?
→ Go To 2
No
Yes → Refer to the wiring diagrams located in the service information to
2 Turn the ignition off.
Disconnect the SKIM harness connector.
Measure the voltage of the Fused B+ circuit.
Is the voltage above 10.0 volts?
Yes → Go To 3
→ Repair the Fused B+ circuit for an open.
No
3 Turn the ignition off.
Disconnect the SKIM harness connector.
Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit.
Is the voltage above 10.0 volts?
Yes → Go To 4
→ Repair the Fused Ignition Switch Output circuit for an open.
No
4 Turn the ignition off.
Disconnect the SKIM harness connector.
Measure the resistance between ground and the ground circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 5
→ Repair the ground circuit for an open.
No
POSSIBLE CAUSES
ACTION
help isolate a possible intermittent open or short.
Perform SKIS VERIFICATION.
Perform SKIS VERIFICATION.
Perform SKIS VERIFICATION.
Perform SKIS VERIFICATION.
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APPLICABILITY
All
All
All
All