Pinpoint Tests
Daytime Running Lamps (DRL)
Pinpoint Tests
Pinpoint Test Y: The Daytime Running Lamps (DRL) Are Inoperative
Normal Operation - Fusion, Milan
When the ignition switch is in the RUN position, the headlamps are not on (from the autolamp system or manual control from the headlamp switch) and the transmission is not in PARK (P) (automatic transaxle) or the parking brake is released (manual transaxle), the Smart Junction Box (SJB) provides a pulse-width modulated voltage to the low beam headlamps. This illuminates the headlamps at a reduced intensity.
MKZ
When the ignition switch is in the RUN position, the headlamps are not on (from the autolamp system or manual control from the headlamp switch) and the transmission is not in PARK (P), the SJB provides voltage to the front turn lamps (on solidly, not flashing).
This pinpoint test is intended to diagnose the following:
- Exterior lighting system input/output
- Ignition switch input
- Parking brake switch input (manual transaxle)
- Transmission gear input (automatic transaxle)
- SJB
PINPOINT TEST Y: THE DRL ARE INOPERATIVE
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Y1 VERIFY THE DRL OPERATION
- Ignition ON.
- Place the headlamp switch in the OFF position.
- For vehicles with a manual transaxle, release the parking brake.
- For vehicles with an automatic transaxle, place the gear selector lever in any gear other than PARK (P).
- Are the DRL illuminated?
Yes
The system is operating correctly. INFORM the customer of the conditions required for the DRL to operate correctly.
No
GO to Y2.
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Y2 CHECK THE OPERATION OF THE HEADLAMPS OR FRONT TURN LAMPS
- For Fusion or Milan, place the headlamp switch in the HEADLAMPS ON position and observe the headlamps.
- For MKZ, turn the hazard flasher lamps on and observe the front turn lamps.
- Do the headlamps or front turn lamps operate correctly?
Yes
GO to Y3.
No
REFER to Headlamps Testing and Inspection or Turn Signal and Hazard Lamps Testing and Inspection.
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Y3 CHECK THE IGNITION SWITCH INPUT
- Place the headlamp switch in the OFF position.
- Enter the following diagnostic mode on the scan tool: SJB DataLogger.
- Monitor the SJB ignition switch PID (IGN_SW) while cycling the ignition switch through all its positions.
- Does the PID agree with the ignition switch positions?
Yes
For vehicles with an automatic transaxle, GO to Y4.
For vehicles with a manual transaxle, GO to Y5.
No
REFER to Steering Column to diagnose the input from the ignition switch. Testing and Inspection
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Y4 CHECK THE TRANSAXLE GEAR INPUT
- Enter the following diagnostic mode on the scan tool: Transmission Control Module (TCM) DataLogger.
- Monitor the TCM transmission gear status PID (TR) while placing the gear selector lever through all its positions.
- Does the PID agree with the gear selection?
Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.
No
REFER to Transmission Control Systems to diagnose the transmission range input. Testing and Inspection
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Y5 CHECK THE BRAKE WARNING INDICATOR OPERATION
- Apply and release the parking brake while observing the brake warning indicator.
- Does the brake warning indicator operate correctly?
Yes
INSTALL a new SJB. REFER to Body Control Systems. TEST the system for normal operation.
No
REFER to Instrument Panel, Gauges and Warning Indicators to diagnose the parking brake switch input.
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