Tribute 4WD L4-2.3L Hybrid (2008)
Courtesy Lamp: Testing and Inspection
Pinpoint Test 3: The Courtesy Lamps Stay On Continuously
PINPOINT TEST 3: THE COURTESY LAMPS STAY ON CONTINUOUSLY
Normal Operation
When any door, liftgate, or liftgate glass is opened, the ajar switch opens the circuit to the smart junction box (SJB). The smart junction box (SJB)
monitors the dimmer switch status on circuit (BR) to determine if the courtesy lamps are requested. The SJB monitors the door ajar and dimmer switch
input circuits, and based on the status, the SJB supplies voltage to the courtesy lamps on circuit (GY/V).
-
DTC B1320 (Driver Door Ajar Circuit Open) - is an on-demand DTC that sets when the SJB detects an open from the LH front door ajar circuit.
-
DTC B1328 (Passenger Door Ajar Circuit Open) - is an on-demand DTC that sets when the SJB detects an open from the RH front door ajar
circuit.
-
DTC B1336 Door Ajar RR Circuit Open - is an on-demand DTC that sets when the SJB detects an open from the RH rear door ajar circuit.
-
DTC B1572 (Door Ajar LR Circuit Open) - is an on-demand DTC that sets when the SJB detects an open from the LH rear door ajar circuit.
-
DTC B1688 (Lamp Dome Input Circuit Short to Ground) - is an on-demand DTC that sets when the SJB detects a short to ground from the
dimmer switch circuit.
-
DTC B2077 (Liftgate Ajar Switch Circuit Failure) - is an on-demand DTC that sets when the SJB detects an open from the liftgate glass or the
liftgate ajar circuit.
-
DTC B2A35 (Courtesy Lighting Output Circuit Open) - is an on-demand DTC that sets when the SJB detects a short to voltage from the courtesy
lamp circuit.
Possible Causes
-
Wiring, terminals or connectors
-
Dimmer switch
-
Door ajar switch (part of door latch)
-
Liftgate ajar switch (part of liftgate latch)
-
Liftgate glass ajar switch (part of liftgate glass latch)
-
SJB
Diagnostic Procedure
CAUTION: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
