Front Floor Console Cup Holder Illumination Malfunction
Front Floor Console Cup Holder Illumination 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.
Circuit/System Description
The front floor console cup holder lighting unit consists of a lighting electronic control unit, membrane control switch, cupholder LEDs and footwell LEDs. When the driver activates the control switch, the control unit receives a signal to command the accessory lighting ON. This signal applies the appropriate voltage to each of the three signal circuits on the footwell LED and cup holder LED harnesses. Power for the accessory lighting is taken from the accessory power outlet - center console compartment.
When the lighting unit is initially installed and powered up, the LEDs should be OFF. The ECU allows for six different colors of light to be displayed. Touching the membrane switch once will command the ECU on, and the LEDs will illuminate blue. Subsequent control of the membrane switch will go through the full color progression: blue - red - white - yellow - purple - green. Activating the switch a seventh time will turn the lighting off, where the full progression can be cycled through again. If the accessory lighting LEDs are running when the vehicle is turned OFF, the LEDs will default to illuminate blue once the vehicle is turned on again.
The lighting control unit includes a two amp fuse, and also has a battery power harness - which is permanently attached. A connector for the membrane switch will plug into the control unit, as will separate connectors for the footwell lighting (gray connector) and cup holder lighting (white connector).
Diagnostic Aids
The following two tables can be used to try and troubleshoot incorrect operation of the footwell and cup holder LEDs. The tables show the voltage measurements taken at each pin for each of the 7 controller output combinations (6 different colors and 1 off position). The table labeled gray connector refers to the footwell lighting outputs and the table labeled white connector refers to the cup holder lighting outputs. Measurements are taken from the appropriate colored electrical control unit connector at the terminal position indicated (red, green, blue).
The resistance to ground was also measured for the gray and white terminals. While the ignition for the vehicle was off, the resistance was 15.1 ohm. The resistance was 22 ohm while the key was off.
Reference Information
Schematic Reference
Cigar Lighter/Power Outlet Schematics [1][2]Auxiliary Power Outlet
Connector End View Reference
Component Connector End Views Connector End Views By Name
Description and Operation
Interior Lighting Systems Description and Operation Interior Lighting Systems
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 Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON, install a 12 V DC accessory into the X80B accessory power receptacle - center console 2. Command the Accessory/Retained Accessory Power Relay Command ON and OFF with a scan tool. The KR80 accessory relay should click and the 12 V DC accessory should have power.
• If the 12 V DC accessory does not have power, refer to Power Outlet Receptacle Malfunction (12V DC) Power Outlet Receptacle Malfunction (12V DC)Power Outlet Receptacle Malfunction (110V AC) Power Outlet Receptacle Malfunction (110V AC).
2. Ignition ON, observe the front floor console lights and cup holder lights while activating the membrane switch. The lighting should turn cycle through its color progression as the switch is activated.
• If the footwell lights and cup holder lights do not cycle through the color progression as the switch is activated, refer to Component Testing.
3. Observe the cup holder lights while activating the membrane switch. The lighting should turn cycle through its color progression as the switch is activated.
• If the cup holder lights do not cycle through the color progression as the switch is activated, refer to Cup Holder Lighting Malfunction.
4. Observe the front footwell lights while turning the accessory lighting electronic control unit switch ON and OFF. The lighting should turn ON and OFF when changing between the selected states.
• If the footwell lights do not cycle through the color progression as the switch is activated, refer to Front Footwell Lighting Malfunction.
Circuit/System Testing
Cup Holder Lighting Malfunction
1. Ignition OFF, disconnect the electronic control unit harness connector at the X80B accessory power receptacle - center console 2.
2. Test for less than 5 ohm between the ground circuit terminal C and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the control circuit terminal A and ground.
• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal and the control circuit fuse is open, test the signal circuit terminal A for a short to ground.
4. Ignition OFF, connect the electronic control unit harness connector at the X80B accessory power receptacle - center console 2. Disconnect the cup holder lighting harness connector at electronic control unit.
5. Test for less than 5 ohm between the ground circuit terminal 4 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
6. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 4.
7. Cycle through the output color combinations by using the membrane switch. The test lamp should turn ON and OFF depending on the voltage setting of the lighting combination.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the electronic control unit.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic control unit.
8. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 4.
9. Cycle through the output color combinations by using the membrane switch. The test lamp should turn ON and OFF depending on the voltage setting of the lighting combination.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the electronic control unit.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic control unit.
10. Connect a test lamp between the control circuit terminal 3 and the ground circuit terminal 4.
11. Cycle through the output color combinations by using the membrane switch. The test lamp should turn ON and OFF depending on the voltage setting of the lighting combination.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the electronic control unit.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic control unit.
12. If all circuits test normal, test or replace the cup holder lighting.
Front Footwell Lighting Malfunction
1. Ignition OFF, disconnect the electronic control unit harness connector at the X80B accessory power receptacle - center console 2.
2. Test for less than 5 ohm between the ground circuit terminal C and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
3. Ignition ON, verify that a test lamp illuminates between the control circuit terminal A and ground.
• If the test lamp does not illuminate, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal and the control circuit fuse is open, test the signal circuit terminal A for a short to ground.
4. Ignition OFF, connect the electronic control unit harness connector at the X80B accessory power receptacle - center console 2. Disconnect the cup holder lighting harness connector at electronic control unit.
5. Test for less than 5 ohm between the ground circuit terminal 4 and ground.
• If greater than the specified range, test the ground circuit for an open/high resistance.
6. Connect a test lamp between the control circuit terminal 1 and the ground circuit terminal 4.
7. Cycle through the output color combinations by using the membrane switch. The test lamp should turn ON and OFF depending on the voltage setting of the lighting combination.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the electronic control unit.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic control unit.
8. Connect a test lamp between the control circuit terminal 2 and the ground circuit terminal 4.
9. Cycle through the output color combinations by using the membrane switch. The test lamp should turn ON and OFF depending on the voltage setting of the lighting combination.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the electronic control unit.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic control unit.
10. Connect a test lamp between the control circuit terminal 3 and the ground circuit terminal 4.
11. Cycle through the output color combinations by using the membrane switch. The test lamp should turn ON and OFF depending on the voltage setting of the lighting combination.
• If the test lamp is always ON, test the control circuit for a short to voltage. If the circuit tests normal, replace the electronic control unit.
• If the test lamp is always OFF, test the control circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the electronic control unit.
12. If all circuits test normal, test or replace the footwell lighting.
Component Testing
1. Ignition OFF, disconnect the membrane switch harness connector at the electronic control unit.
2. Test for infinite resistance between the signal terminal 4 and the ground terminal 7 with the switch in the open position.
• If not the specified value, replace the membrane switch.
3. Test for less than 5 ohm between the signal terminal 4 and the ground terminal 7 with the switch in the closed position.
• If greater than the specified range, replace the membrane switch.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the diagnostic procedure.
Repair Verification
* Front Floor Console Cup Holder Illumination Lamp Package Installation
* Control Module References Control Module References for module replacement, programming and setup