For 1990-2009 cars

### Circuit Description

The driver information center (DIC) switch is a multiplexed switch that functions as a DIC/Dimmer switch. The instrument panel cluster (IPC) only monitors the DIC switch inputs. The dimmer switch is monitored by the instrument panel module (IPM). The DIC switch is a momentary contact switch that connects a series of resistors. The IPC monitors the DIC switch signal circuit to determine the DIC switch inputs. Each switch state - INFO UP, INFO DOWN, INFO RESET, ENGLISH/METRIC, TRIP RESET - corresponds to a certain resistance value. The IPC determines the switch state by the voltage drop across the resistors. The IPC sets DTC B3567 when it detects a stuck DIC switch or when the DIC signal circuit is shorted to battery.

### DTC Descriptors

This diagnostic procedure supports the following DTC:

DTC B3567 Driver Information Center (DIC) Select Switch Circuit

This vehicle has a DTC which includes DTC Symptoms. For more information on DTC symptoms, refer to DTC Symptom Description .

DTC Symptom | DTC Symptom Descriptor
--- | ---
01 | Short to Battery
07 | Component Protection Time-Out

### Conditions for Running the DTC

The ignition is in ACCESSORY or RUN.

### Conditions for Setting the DTC

• | The IPC detects that the DIC switch is stuck.

• | The IPC detects that the DIC switch signal circuit is shorted to battery.

### Action Taken When the DTC Sets

The IPC ignores the DIC switch inputs. The IPC sets DTC B3567.

### Conditions for Clearing the DTC

• | The DTC becomes history when the fault is no longer present.

• | The IPC receives a clear code command from the scan tool.

• | A History DTC clears after 40 malfunction-free ignition cycles.

### Diagnostic Aids

• | When the Info Up, Info Down, Info Reset, or English/Metric switch is stuck, only the Trip A/B switch functions correctly. When the Trip A/B switch is stuck, all other DIC switches function correctly.

• | Only the DIC signal circuit can be diagnosed as shorted to battery.

• | Refer to Testing for Intermittent Conditions and Poor Connections .

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Instrument Cluster Schematics . Connector End View Reference: Component Connector End Views or Inline Harness Connector End Views
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle
2 |

1. Install a scan tool.
2. Turn the ignition ON, with the engine OFF.
3. Activate and release each of the driver information center (DIC) switches.
4. With a scan tool, observe the following DIC switch parameters in the instrument panel cluster (IPC) Data List:

• | Information Down Switch

• | Information Up Switch

• | Information Reset Switch

• | Trip Reset Switch

• | English/Metric Switch

Does the scan tool display Active when each switch is pressed and Inactive when each switch is released?

Go to Diagnostic Aids

Go to Step 3

3 |

1. Turn OFF the ignition.
2. Disconnect the DIC/Dimmer Switch.
3. Connect a test lamp between the DIC switch signal circuit and a good ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 5

4 | Test the DIC switch signal circuit for a short to battery voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 6
5 | Inspect for poor connections at the harness connector of the DIC switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 7
6 | Inspect for poor connections at the harness connector of the IPC. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | Go to Step 9 | Go to Step 8
7 | Replace the instrument panel (I/P) dimmer switch. Refer to Instrument Panel Lamp Dimmer Switch Replacement . Did you complete the replacement? | Go to Step 9 | --
8 | Replace the instrument panel cluster (IPC). Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | Go to Step 9 | --
9 |

1. Use the scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

Go to Step 2

System OK