B0608 Power Moding Malfunction

DTC B0608 Power Moding Malfunction:

DTC B0608 Power Moding Malfunction (Part 1 Of 2):

DTC B0608 Power Moding Malfunction (Part 2 Of 2):

CIRCUIT DESCRIPTION
The instrument cluster receives voltage inputs from 3 ignition signals. The instrument cluster receives voltage from the IGN0 fuse when the ignition switch in OFF, RUN or START. The instrument cluster receives voltage from the CLUSTER fuse in RUN, BULB TEST, or START and from the CRANK SIGNAL fuse when in START. If the instrument cluster does not see any of the following voltage input conditions, a DTC code is set:
^ If IGN1 is active and IGN0 is inactive.
^ If CRANK is active and IGN0 is inactive.
^ If CRANK is active and IGN1 is inactive.

CONDITIONS FOR SETTING THE DTC
^ The instrument cluster does not detect voltage from IGN0 when in OFF, RUN or START, but the instrument cluster detects voltage in IGN1 when in RUN, BULB TEST or START.
^ The instrument cluster detects voltage in CRANK when in START, but the instrument cluster does not detect voltage from IGN0 when in OFF, RUN or START
^ The instrument cluster detects voltage in CRANK when in START, but the instrument cluster does not detect voltage from IGN1 when in OFF, RUN or START.
^ All conditions must be present for more than 0.3 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ Stores a DTC B0608 in the instrument cluster memory.
^ SERVICE VEHICLE SOON will be displayed for this DTC.

CONDITIONS FOR CLEARING THE DTC
^ Under all fault conditions, the ignition must be cycled before this DTC can change from current to history.
^ The instrument cluster no longer detects an open or short to B+.
^ A history DTC will clear after 100 drive cycles if the condition for the malfunction is no longer present.
^ Using a scan tool.

DIAGNOSTIC AIDS
The following conditions may cause an intermittent malfunction to occur:
^ An intermittent open or short to voltage in circuit 39, 806, or 1500.
^ Poor connections at the instrument cluster or fuse block.
^ The instrument cluster is always detecting B+ from one or more of these 3 inputs.
^ The instrument cluster is never recognizing B+.

TEST DESCRIPTION
Numbers below refer to the step numbers on the diagnostic table.
1. Always perform the Instrument Cluster Diagnostic System Check before attempting to diagnose a DTC B0608.
2. This test will determine if there is a short to B+ in circuit 1500.
4. This test checks for an open in circuit 1500.
5. This test will determine if there is a short to B+ in circuit 806.
8. This test checks for an open in circuit 806.
9. This test will determine if there is a short to B+ in circuit 39.
11. This test checks for an open in circuit 439.