Durango 2WD V6-3.7L (2009)
Traction Control Indicator Lamp: Description and Operation
Traction Control Indicator - Operation
OPERATION
The traction control indicator gives an indication to the vehicle operator when the Electronic Stability Program (ESP)/Brake Assist System
(BAS)/Traction Control System (TCS) has been activated. This indicator is controlled by a transistor on the instrument cluster circuit board based upon
cluster programming and electronic messages received by the cluster from the Controller Antilock Brake (CAB) over the Controller Area Network
(CAN) data bus.
The traction control indicator is completely controlled by the instrument cluster logic circuit. This logic only allows the indicator to operate when the
instrument cluster receives a battery current input on the fused ignition switch output (run-start) circuit. Therefore, the indicator is always off when the
ignition switch is in any position except ON or START. The indicator only illuminates when it is provided a path to ground by the instrument cluster
transistor. The instrument cluster turns on the traction control indicator for the following reasons:
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Bulb Test - Each time the ignition switch is turned to the ON position the traction control indicator is illuminated for about four seconds as a bulb
test. The entire bulb test is a function of the CAB.
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Traction Control Indicator Lamp-On Message - Each time the cluster receives an electronic traction control indicator lamp-on message from
the CAB indicating that the ESP/BAS/TCS has been activated, the traction control indicator illuminates. The indicator remains illuminated until
the cluster receives a lamp-off message from the CAB, or until the ignition switch is turned to the OFF position, whichever occurs first.
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Self Test - Each time the cluster is put through the self test, the traction control indicator turns on, then off again during the bulb check portion of
the test to confirm the functionality of the LED and the cluster control circuitry.
The CAB continually monitors the status of the inputs to the ESP/BAS/TCS systems to determine the proper outputs to the components of the Antilock
Brake System (ABS). The CAB then sends the proper lamp-on or lamp-off message to the instrument cluster, also known as the Cab Compartment Node
(CCN). For further diagnosis of the traction control indicator or the instrument cluster circuitry that controls the indicator, See: Instrument Panel, Gauges
and Warning Indicators/Instrument Cluster / Carrier/Testing and Inspection.
Use a diagnostic scan tool for proper diagnosis of the ESP/BAS/TCS, the CAB, the CCN, the CAN data bus or the electronic communication related to
traction control indicator operation. Refer to the appropriate diagnostic information.
