The instrument panel cluster (IPC) receives battery positive voltage from the left IP junction block IPC/HVAC BATT fuse, through CKT 1440 to terminal A1. The IPC receives ignition voltage (ACCY, ON and START) from the left IP junction block IPC/BFC ACC fuse, through CKT 1600 to terminal B9.

The IPC receives ground from CKT 151 to terminal A4 and B10.

The IPC receives all SPI serial data messages on CKT 1321 at terminal A9. The IPC transmits all SPI serial data messages to the BCM on CKT 1322 at terminal A2. CKT 1323 at terminal A10 is the SPI clock which controls the communication timing between the BCM and the IPC.

The IPC uses the SPI serial data to light the various indicators and control the coolant temp and fuel level gauges. CKT 817 to terminal A8 is the VSS signal that controls the speedometer. CKT 121 to terminal A7 is the tach signal that controls the tachometer. The SERVICE ENGINE SOON indicator is the only discrete input indicator circuit to the IPC. CKT 419 from the powertrain control module (PCM) to the IPC terminal B11 controls the SERVICE ENGINE SOON indicator.

The left turn indicator is controlled through CKT 14 to terminal B2 of the IPC. The right turn indicator is controlled through CKT 15 to terminal B1 of the IPC.

Instrument cluster illumination is controlled through circuit 8 from the lamp dimmer module to the cluster terminal A5.