Tribute 4WD L4-2.5L Hybrid (2009)
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Courtesy Lamp: Testing and Inspection
Pinpoint Test 1: The Courtesy Lamps Do Not Turn On With A Door Open
PINPOINT TEST 1: THE COURTESY LAMPS DO NOT TURN ON WITH A DOOR OPEN
Normal Operation
The smart junction box (SJB) sends a voltage reference signal to the door ajar switches through circuits (G/V) (LH front door), (W) (RH front door), (G)
(LH rear door) and (Y) (RH rear door). Ground is provided to the door ajar switches through circuit (B/GY). The door ajar switch is closed with the
door closed. When the door is opened, the signal to ground is interrupted indicating an open door to the SJB.The SJB also sends a voltage reference
signal to the instrument panel dimmer switch through circuit (W/BR) to monitor the dome defeat input request. When the instrument panel dimmer
switch is in the DOME DEFEAT position, the signal is routed to ground indicating a request for the dome defeat feature.When 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 SJB
provides voltage to the courtesy lamps unless the dome defeat from the instrument panel dimmer switch is detected
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DTC B213A (Digital Dimmer Switch Input Circuit Failure) - a continuous and on-demand DTC that may set when the SJB detects multiple input
requests from the instrument panel dimmer switch.
Possible Causes
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Wiring, terminals or connectors
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Door ajar switch (part of door latch)
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Instrument panel dimmer switch
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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.
NOTE:Make sure the instrument panel dimmer switch is not in the DEFEAT position before continuing diagnostics.
NOTE:Make sure the interior lamp switches are in the DOOR position.