Important: Always perform the Diagnostic System Check - Vehicle
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
DIC Switch Signal Circuit | 1 | 1 | P3567 | P3567 |
DIC Switch Ground Reference Circuit | -- | 1 | -- | -- |
1. Driver Information Center (DIC) Switch(es) Inoperative |
The driver information center (DIC) switch is a multiplexed switch that functions as a DIC/Dimmer switch. Battery power is provided to the DIC switch via the instrument panel cluster (IPC) with the DIC switch signal circuit pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a ground reference. The switch input to the cluster is pulled low or grounded when a switch is activated. The DIC switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state -- SET/RESET, TRIP/FUEL INFO, DIC VEHICLE INFO, PERSONALIZATION-- corresponds to a certain resistance value. The IPC determines the switch state by the voltage drop across the resistors. A stuck switch or a short to battery sets a DTC.
⇒ | If greater than 1 ohm, test the ground reference circuit for an open/high resistance. |
⇒ | If all DIC switch parameters are not Inactive, test the signal circuit for a short to ground. If the circuit tests normal, replace the instrument panel cluster (IPC). |
⇒ | If not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC. |
Important: Always perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for the IPC replacement, setup and programming. |