Diagnostic Instructions
| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Diagnostic Fault Information
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
DIC Switch Signal Circuit | 1 | 1 | 1 | -- |
DIC Switch Ground Reference Circuit | -- | 1 | -- | -- |
1. Driver Information Center (DIC) Switch(es) Inoperative | ||||
Circuit/System Description
The driver information center (DIC) switch(es) are normally open momentary switch(es). 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 battery positive voltage circuit is fused in the body control module (BCM). The instrument panel cluster (IPC) interfaces with the driver information center (DIC) switch(es) via two discreet circuits. The switch(es) input to the cluster is pulled low or grounded when a switch is activated. The IPC reads the voltage at the analog input to determine which switch(es) is pressed. The switch(es) input to the cluster is set up in a resistor ladder format. The DIC switch(es) include the INFO and the SET/RESET switches. A simultaneous press and hold of the INFO and SET/RESET switch activates the MENU switch. The MENU switch is the third embedded switch used to activate the various DIC personalization menus.
Reference Information
Schematic Reference
Connector End View Reference
Electrical Information Reference
Scan Tool Reference
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch assembly.
- Ignition OFF, test for less than 1 ohm of resistance between the ground reference circuit and ground.
- Ignition ON, verify that all scan tool DIC Switch parameters are Inactive.
- Ignition ON, install a 3-amp fused jumper wire between the signal circuit and the ground reference circuit. Verify that all scan tool DIC switch parameters are Active.
- If all circuits test normal, test or replace the DIC switch.
| ⇒ | 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. |
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for the IPC replacement, setup, and programming |
