Pinpoint Test N: The Ambient Lighting Does Not Cycle Through All Color Combinations

Interior Lighting

Pinpoint Tests

Pinpoint Test N: The Ambient Lighting Does Not Cycle Through All Color Combinations - MKZ

Refer to Wiring Diagram Set 89 (Fusion/Milan/MKZ, Fusion Hybrid/Milan Hybrid), Interior Lamps for schematic and connector information. Diagrams By Number

Normal Operation

The Interior Lighting Control Module (ILCM) supplies voltage and ground to the LEDs located in the floor console cup holders, storage tray, storage bin, door map pockets and the front and rear footwells. The ambient lighting select switch is used to cycle through the 7 color combinations or to turn the ambient lighting feature off. There are 4 different color (red, blue, green and white) LEDs housed within each LED assembly.

The ILCM sends a voltage signal to the ambient lighting select switch. When the ambient lighting switch (a momentary contact switch) is pressed, the voltage signal is routed to ground indicating a request for the module to cycle the ambient lighting to the next color setting.

B2B0A-B2B17:

B2B16:

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- Ambient lighting harness
- Ambient lighting select switch
- ILCM



PINPOINT TEST N: THE AMBIENT LIGHTING DOES NOT CYCLE THROUGH ALL COLOR COMBINATIONS - MKZ

NOTICE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.

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N1 CHECK THE INPUT FROM THE AMBIENT LIGHTING SWITCH


- Enter the following diagnostic mode on the scan tool: ILCM DataLogger .
- While pressing and releasing the ambient lighting switch, monitor the ILCM ambient lighting select switch PID (AmbiColor).
- Does the PID read active with the switch pressed and idle with the switch released?

Yes
GO to N2.

No
GO to Pinpoint Test M. Pinpoint Test M: The Ambient Lighting Is Inoperative

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N2 CHECK THE AMBIENT LIGHTING HARNESS


- Ignition OFF.
- Check the diode circuits between the ILCM, harness side as follows:









- Does the meter indicate the circuit is good?

Yes
GO to N3.

No
REPAIR the circuit in question or INSTALL a new ambient lighting harness. TEST the system for normal operation.

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N3 CHECK FOR CORRECT ILCM OPERATION


- Disconnect the ILCM connector.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect the ILCM connector and make sure it seats correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new ILCM. REFER to Interior Lighting Control Module (ILCM) Interior Lighting Control Module (ILCM). TEST the system for normal operation.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.

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