Chart A, Blank Odometer Display

Loss of IPC display and messages can result from the following:

Loss of 12 volt power to IPC (circuit No. 812).
Loss of ground to IPC (circuit No. 803).
Internal fault in CPS or IPC.
NOTE: If you Have Not performed The "SELF DIAGNOSTIC SYSTEM CHECK" Start There First.

NOTE: Test numbers refer to numbers on diagnostic chart.

This test checks the IPC power and grounds.
Power, Ignition 3 and ground circuits to IPC are functioning properly; therefore, fault is either in terminal contacts or internal to the IPC.
The 12-volt feed to the IPC is not functioning. Check for open in circuit No. 640.

Fig 1: Chart A, Schematic, Blank Odometer Display

Fig 2: Flow Chart A, Blank Odometer Display