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 | -- |
1. Driver Information Center (DIC) Switch Malfunction | ||||
Circuit/System Description
The driver information center (DIC) switches are normally open momentary contact switches. Power is provided to the DIC switches via the instrument panel cluster (IPC) ignition 1 voltage circuit. The IPC ignition 1 voltage circuit is fused in the body control module (BCM). The IPC interfaces with the DIC switches via two discreet circuits. The switch 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 is pressed. The switch input to the cluster is set up in a resistor ladder format. The DIC switches include the INFO and the SELECT/RESET switches. A simultaneous press and hold of the INFO and SELECT/RESET switch activates the MENU switch. The MENU switch is the third embedded switch used to activate the various DIC menus.
Reference Information
Schematic Reference
Connector End View Reference
Description and Operation
Driver Information Center (DIC) Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, verify that when the DIC switches are pressed and released the DIC switch scan tool parameters toggle between Active and Inactive.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the driver information center (DIC) switch.
- Ignition OFF, test for less than 1 ohm of resistance between the ground circuit terminal 7 and ground.
- Ignition ON, verify that all scan tool DIC Switch parameters are Inactive.
- Ignition ON, install a 3-A fused jumper wire between the signal circuit terminal 1 and the ground circuit terminal 7. Verify that all scan tool DIC switch parameters are Active.
- If all circuits test normal, test or replace the DIC switch.
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If any DIC switch parameters are not Inactive, test the signal circuit terminal 1 for a short to ground. If the circuit tests normal, replace the IPC. |
| ⇒ | If any is 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 IPC replacement, setup, and programming |
