Pinpoint Test G: The Puddle Lamps Stay On Continuously

Interior Lighting

Pinpoint Test G: The Puddle Lamps Stay On Continuously

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

Normal Operation

When the request from the instrument panel dimmer switch is detected, any door is opened, a correct unlock code from the keyless entry keypad or an unlock request from a programmed Remote Keyless Entry (RKE) transmitter is detected, the Smart Junction Box (SJB) supplies voltage to the puddle lamps.

- DTC B2A39 (Puddle Lamp Output Circuit Open) - an on-demand DTC that sets when the SJB detects a short to voltage from the puddle lamp output circuit.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors
- SJB


PINPOINT TEST G: THE PUDDLE LAMPS STAY ON CONTINUOUSLY

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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G1 CHECK THE INTERIOR COURTESY LAMPS

- Ignition OFF.
- Are the interior courtesy lamps illuminated?

Yes
GO to Pinpoint Test F. Pinpoint Test F: The Interior Courtesy Lamps Stay On Continuously

No
GO to G2.

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G2 CHECK THE SJB PUDDLE LAMP OUTPUT CIRCUIT FOR A SHORT TO VOLTAGE

- Disconnect: SJB C2280c .
- Ignition ON.
- Do the puddle lamps continue to illuminate?

Yes
REPAIR circuit CLN25 (VT) for a short to voltage. CLEAR the DTCs. REPEAT the self-test.

No
GO to G3.

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G3 CHECK FOR CORRECT SJB OPERATION

- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
INSTALL a new SJB. REFER to Multifunction Electronic Modules Service and Repair. 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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