Tribute 2WD L4-2.5L (2009)
Step 6
Pinpoint Test 2: The Parking, Rear Or License Plate Lamps Are On Continuously
PINPOINT TEST 2: THE PARKING, REAR OR LICENSE PLATE LAMPS ARE ON CONTINUOUSLY
Normal Operation
The smart junction box (SJB) monitors the parking lamp request input from the headlight switch through circuit (L/GY). The SJB provides a ground for
the parking lamp relay coil (integrated into the SJB) when a request for the parking lamps is received. When the parking lamp relay is energized, voltage
is routed through circuit (V/W) to the rear and front parking lamps.
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DTC B1578 (Lamp Park Input Circuit Short to Ground) - an on-demand DTC that sets when the SJB detects a short to ground from the parking
lamps on input circuit.
Possible Causes
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Wiring, terminals or connectors
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Headlight switch
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SJB
Diagnostic Procedure