Symptom:
*NO BUS BIAS FAILURE
POSSIBLE CAUSES
DRB OR DRB CABLE
INSPECT JUNCTION BLOCK FUSE #9
OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT
INSTRUMENT CLUSTER
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
Disconnect the DRB from the Data Link Connector (DLC).
Measure the voltage of the CCD Bus (+) and the CCD Bus (-) circuits in the DLC.
Is the voltage between 1.8 and 2.8 volts on both circuits?
All
Yes
→
Repair/Replace the DRB or DRB cable as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
2
2
Turn the ignition off.
Remove and inspect Fuse #9 in the Junction Block.
Is the fuse open?
All
Yes
→
Refer to the wiring diagrams located in the service information to
help isolate a possible short to ground on the Fused Ignition
Switch Output circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Go To
3
3
Turn the ignition off.
NOTE: Ensure Fuse #9 is installed in the Junction Block.
Disconnect the Instrument Cluster C1 harness connector.
Turn the ignition on.
Measure the voltage of the Fused Ignition Switch Output circuit.
Is the voltage above 10.0 volts?
All
Yes
→
Go To
4
No
→
Repair the Fused Ignition Switch Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
If there are no possible causes remaining, view repair.
All
Repair
Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
56
COMMUNICATION