Commander 2WD V6-3.7L (2009)
TEMP message which appears in place of the compass/trip computer information in the dot matrix display.
The dot matrix OLED is soldered onto the cluster electronic circuit board, and is visible through a window with a smoked clear lens located on the lower
edge of the tachometer gauge dial face of the cluster overlay. The dark lens over the OLED prevents it from being clearly visible when it is not
illuminated. The transmission over-temperature indicator textual message appears in the same white color and at the same lighting level as the
compass/trip computer information when it is illuminated by the instrument cluster electronic circuit board.
The transmission over-temperature indicator is serviced as a unit with the OLED in the instrument cluster.
Transmission Temperature Indicator - Operation
OPERATION
The transmission over-temperature indicator gives an indication to the vehicle operator when the transmission fluid temperature is excessive, which may
lead to accelerated transmission component wear or failure. This indicator is controlled by the instrument cluster logic circuit based upon cluster
programming and electronic messages received over the Controller Area Network (CAN) data bus from the Front Control Module (FCM).
The transmission over-temperature indicator function of the reconfigurable dot matrix Organic Light Emitting Diode (OLED) display unit is completely
controlled by the instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery
current input on the fused ignition switch output (run-start) circuit. Therefore, the OLED transmission over-temperature indication will always be OFF
when the ignition switch is in any position except ON or START. The instrument cluster will turn ON the transmission over-temperature indicator for the
following reasons:
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Trans Over-Temp Indicator Lamp-On Message - Each time the cluster receives an electronic trans over-temp indicator lamp-ON message
from the FCM indicating that the fluid temperature is 135 °C (275 °F) or higher, the transmission over-temperature indicator will be illuminated
and a single chime tone is sounded. The indicator remains illuminated for about five seconds, until the cluster receives a lamp-OFF message from
the FCM, until the cluster arbitrator logic determines that another display request has priority, or until the ignition switch is turned to the OFF
position, whichever occurs first. The chime tone feature will only repeat during the same ignition cycle if the indicator is cycled OFF and then ON
again by the appropriate lamp-ON and lamp-OFF messages from the FCM.
The FCM continually monitors the transmission temperature sensor to determine the transmission operating condition. The FCM then sends the proper
lamp-ON or lamp-OFF message to the instrument cluster, also known as the Cab Compartment Node (CCN). If the instrument cluster illuminates the
transmission over-temperature indicator due to a high transmission oil temperature condition, it may indicate that the transmission or the transmission
cooling system are being overloaded or that they require service.
For proper diagnosis of the transmission temperature sensor, the FCM, the CCN, the CAN data bus or the electronic communication related to
transmission over-temperature indicator operation a diagnostic scan tool is required. Refer to the appropriate diagnostic information.
Water In Fuel Indicator - Description
DESCRIPTION
A water-in-fuel indicator is standard equipment on all instrument clusters. However, on vehicles not equipped with the optional diesel engine, this
indicator is electronically disabled. The water-in-fuel indication appears within the reconfigurable dot matrix Organic Light Emitting Diode (OLED)
display unit. The water-in-fuel indicator consists of a textual WATER IN FUELmessage which appears in place of the compass/trip computer
information in the dot matrix display.
The dot matrix OLED is soldered onto the cluster electronic circuit board, and is visible through a window with a smoked clear lens located on the lower
edge of the tachometer gauge dial face of the cluster overlay. The dark lens over the OLED prevents it from being clearly visible when it is not
illuminated. The water-in-fuel indicator textual message appears in the same white color and at the same lighting level as the compass/trip computer
information when it is illuminated by the instrument cluster electronic circuit board.
The water-in-fuel indicator is serviced as a unit with the OLED in the instrument cluster.
Water In Fuel Indicator - Operation
OPERATION
The water-in-fuel indicator gives an indication to the vehicle operator when there is excessive water detected in the diesel fuel. This indicator is
controlled by the instrument cluster logic circuit based upon cluster programming and electronic messages received over the Controller Area Network
(CAN) data bus from the Powertrain Control Module (PCM).
The water-in-fuel indicator function of the reconfigurable dot matrix Organic Light Emitting Diode (OLED) display unit is completely controlled by the
instrument cluster logic circuit, and that logic will only allow this indicator to operate when the instrument cluster receives a battery current input on the
