• | 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. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
DIC Switch Signal | 1 | 1 | P3567 | P3567 |
DIC Select Switch Signal | 1 | 1 | 1 | P3567 |
DIC Switch Low Reference | -- | 1 | -- | -- |
DIC Switch Ground | -- | 1 | -- | -- |
1. Driver Information Center (DIC) Switch Malfunction |
The driver information center (DIC) switch is a multiplexed switch. The DIC switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The DIC switch signal circuit is pulled up to battery voltage in the IPC. The IPC also provides the DIC switch with a low reference. The switch input to the IPC is pulled low when a switch is activated. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state - Set/Reset, Vehicle Information, Personalization - corresponds to a certain resistance value. The IPC determines the switch pressed by the voltage drop across the resistors.
The Trip/Fuel switch is monitored on a separate circuit provided by the IPC. The Trip/Fuel switch signal circuit is monitored for a stuck switch but not a short to battery.
The ignition is in ACCESSORY or RUN.
The IPC detects that the DIC switch is stuck.
The IPC detects that the DIC switch signal circuit is shorted to battery.
The IPC ignores the DIC switch inputs.
• | The DTC becomes history when the conditions for setting the DTC are no longer present. |
• | The history DTC clears after 40 malfunction-free warm-up cycles. |
• | When the Trip/Fuel switch is stuck, all other DIC switches will function correctly. When any of the DIC switches are stuck, only the Trip/Fuel switch functions correctly. |
• | Only the DIC switch signal circuit can be diagnosed as shorted to battery. |
Driver Information Center (DIC) Description and Operation
Control Module References for scan tool information
⇒ | If greater than the specified value, test the low reference circuit for an open/high resistance. |
⇒ | If greater than the specified value, test the ground circuit for an open/high resistance. |
⇒ | If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the IPC. |
⇒ | If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the IPC. |
⇒ | If the test lamp does not illuminate, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the IPC. |
⇒ | If less than the specified value, test the signal circuit for a short to ground. If the circuit tests normal, test or replace the IPC. |
⇒ | If greater than the specified value, test the signal circuit for a short to voltage. If the circuit tests normal, test or replace the IPC. |
⇒ | If the test lamp does not illuminate, test the signal circuit for an open/high resistance. If the circuit tests normal, replace the IPC. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
• | Control Module References for the IPC replacement, setup and programming. |