Chrysler 2005 Crossfire SRT6 Service Manual page 972

8J - 18 INSTRUMENT CLUSTER - ELECTRICAL DIAGNOSTICS
NO COMMUNICATION FROM INSTRUMENT CLUSTER (CONTINUED)
When Monitored and Set Condition
• When Monitored: With the ignition on.
• Set Condition: Serial Communication K1 failure between the A/C Heater Control Module and the Instrument
Cluster.
SERIAL COMMUNICATION K1 CIRCUIT OPEN
INSTRUMENT CLUSTER
For a complete Instrument Cluster Circuit Diagram, (Refer to 8 - ELECTRICAL/INSTRUMENT CLUSTER - SCHE-
MATICS AND DIAGRAMS).
Diagnostic Test
1.
MEASURE THE RESISTANCE OF THE SERIAL COMMUNICATION K1 CIRCUIT
Turn the ignition off.
Disconnect the Instrument Cluster harness connector.
Disconnect the A/C Heater Control Module harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Serial Communication K1 circuit from
the Instrument Cluster harness connector to the A/C Heater Control
Module harness connector.
Is the resistance below 5.0 ohms?
Yes >> Replace the Instrument Cluster. (Refer to 8 - ELECTRI-
CAL/INSTRUMENT CLUSTER - REMOVAL).
Perform BODY VERIFICATION TEST.
No >> Repair the Serial Communication K1 circuit for an open.
Perform BODY VERIFICATION TEST.
POSSIBLE CAUSES
ZH