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 | 1 | 1 | P3567 01 | P3567 59 |
DIC Select Switch Signal | 1 | 1 | 1 | P3567 |
DIC Switch Low Reference | -- | 1 | -- | -- |
DIC Switch Ground | -- | 1 | -- | -- |
1. Driver Information Center (DIC) Switch Malfunction | ||||
Circuit/System Description
The driver information center (DIC) switch is a multiplexed 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 low reference circuit. The switch input to the IPC 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, VEHICLE INFORMATION, PERSONALIZATION (CUSTOMIZATION) - corresponds to a certain resistance value. The IPC determines the switch state by the voltage drop across the resistors.
The TRIP/FUEL DIC switch is monitored on a separate circuit provided by the IPC. The TRIP/FUEL driver information center select menu switch signal circuit is monitored for a stuck switch but not a short to battery.
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 scan tool parameters toggle between Active and Inactive.
Circuit/System Testing
- Ignition OFF, disconnect the harness connector at the DIC switch assembly.
- Ignition OFF, test for less than 1 ohm between the low reference terminal 2 and ground.
- Ignition OFF, test for less than 1 ohm between the ground terminal 5 and ground.
- Ignition ON, verify that all of the scan tool DIC Switch parameters are Inactive.
- Ignition ON, install a 3-A fused jumper wire between the signal circuit terminal 1 and the low reference circuit terminal 2. Verify the scan tool DIC Switch parameters, except the DIC Fuel Info. parameter, are Active.
- Ignition ON, install a 3-A fused jumper wire between the signal circuit terminal 3 and ground. Verify the scan tool DIC Fuel Info. parameter is Active.
- If all the circuits test normal, test or replace the DIC switch assembly.
| ⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. |
| ⇒ | If greater than the specified range, test the ground circuit for an open/high resistance. |
| ⇒ | If any are not Inactive, test the signal circuit terminal listed below for a short to ground. If the circuit tests normal, replace the IPC. |
| • | Signal Terminal 1 |
| • | Signal Terminal 3 |
| ⇒ | If any are not Active, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the IPC. |
| ⇒ | If not Active, test the signal circuit for a short to voltage or and 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 |
