Driver Information Center Switch Malfunction
Driver Information Center Switch Malfunction
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
Diagnostic Fault Information
Circuit/System Description
The driver information center switch is a multiplexed switch. Battery power is provided to the driver information center switch via the instrument panel cluster. The driver information center switch signal circuit is pulled up to battery voltage in the instrument panel cluster. The instrument cluster also provides the driver information center switch with a low reference. The switch input to the instrument cluster is pulled low when a switch is activated. The driver information center switch is a momentary contact switch that connects a series of resistors in a resistor ladder format. The instrument cluster monitors the driver information center switch signal circuit to determine the driver information center switch inputs. Each switch state - Menu, UP, DOWN - corresponds to a certain resistance value. The instrument cluster determines the switch pressed by the voltage drop across the resistors.
Reference Information
Schematic Reference
Instrument Cluster Schematics Instrument Cluster Schematics
Connector End View Reference
Component Connector End Views Sunshade - Left
Description and Operation
Driver Information Center (DIC) Description and Operation Driver Information Center (DIC)
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Programming and Relearning for scan tool information
Circuit/System Verification
Ignition ON, observe the scan tool Driver Information Center Switch parameter, that when the S78 Turn Signal/Multifunction Switches Menu, UP, DOWN, SET/CLR are pressed and released the scan tool parameter toggles between Menu, Up, Down, Clear and Inactive.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the S78 Turn Signal/Multifunction Switch.
2. Ignition OFF for more than 60 s, test for less than 5 ohms between the low reference circuit terminal 6 and ground.
• If greater than the specified range, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
3. Ignition ON, verify the scan tool Driver Information Center Switch parameter is Undefined.
• If not Undefined, test the signal circuits terminal 5 and terminal 12 for a short to ground. If the circuit tests normal, replace the P16 Instrument Cluster
4. Ignition ON, install a 680 ohms resistance between the signal circuit terminal 12 and the low reference circuit terminal 6. Verify the scan tool Driver Information Center Switch parameter is Up.
• If not Up, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
5. Ignition ON, install a 3 A fused jumper wire between the signal circuit terminal 5 and the low reference circuit terminal 6. Verify the scan tool Driver Information Center Switch is Menu.
• If not Menu, test the signal circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the P16 Instrument Cluster.
6. If all circuits test normal, test or replace the S78 Turn Signal/Multifunction Switch.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the S78 Turn Signal/Multifunction Switch.
2. Test for 8.5-9.1 kohms between the signal terminal 12 and the low reference circuit terminal 6.
• If not within the specified range, replace the S78 Turn Signal/Multifunction Switch.
3. Test for 550-650 ohms between the signal terminal 12 and the low reference circuit terminal 6 while pressing the Up switch.
• If not within the specified value, replace the S78 Turn Signal/Multifunction Switch.
4. Test for 1.5-1.7 kohms between the signal terminal 12 and the low reference circuit terminal 6 while pressing the Down switch.
• If not within the specified value, replace the S78 Turn Signal/Multifunction Switch.
5. Test for 3.3-3.7 kohms between the signal terminal 12 and the low reference circuit terminal 6 while pressing the Reset switch.
• If not within the specified value, replace the S78 Turn Signal/Multifunction Switch.
6. Test for less than 5 ohms between the signal terminal 5 and the low reference circuit terminal 6 while pressing the Menu switch.
• If greater than the specified value, replace the S78 Turn Signal/Multifunction Switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
* Turn Signal Switch Replacement Turn Signal Switch Replacement
* Control Module References Programming and Relearning