Dodge Nitro. Manual — part 814

logic circuit. The instrument cluster will turn ON the TPM indicator for the following reasons:



Bulb Test - Each time the ignition switch is turned to the ON position, the SKREEM sends an electronic
TPM indicator lamp-ON message to the cluster to illuminate the TPM indicator for about three seconds
as a bulb test.



TPM Indicator Lamp-On Message - Each time the cluster receives an electronic TPM indicator lamp-
ON message from the SKREEM, the indicator will be illuminated. The indicator can be flashed ON and
OFF, or illuminated solid, as dictated by the SKREEM message. The indicator remains illuminated until
the cluster receives a lamp-OFF message from the SKREEM, or until the ignition switch is turned to the
OFF position, whichever occurs first.



Communication Error - If the cluster receives no TPM lamp-ON or lamp-OFF messages from the
SKREEM for six consecutive seconds, the TPM indicator is illuminated by the instrument cluster. The
indicator remains controlled and illuminated by the cluster until a valid lamp-ON or lamp-OFF message
is received from the SKREEM.



Actuator Test - Each time the cluster is put through the actuator test, the TPM indicator will be turned
ON, then OFF again during the odometer VFD portion of the test in order to confirm the functionality of
the VFD and the cluster control circuitry.

The SKREEM performs a self-test each time the ignition switch is turned to the ON position to decide whether
the TPM system is in good operating condition and whether the tire inflation pressures are too high or too low.
The SKREEM then sends the proper lamp-ON or lamp-OFF message to the Electro Mechanical Instrument
Cluster (EMIC) (also known as the Cab Compartment Node/CCN). If the instrument cluster turns ON the TPM
indicator after the bulb test, it indicates that the inflation pressure of a tire is too low or that a malfunction has
occurred and the TPM system is ineffective.

For proper diagnosis of the TPM system, the SKREEM, the EMIC, the CAN data bus or the electronic
communication related to TPM indicator operation a diagnostic scan tool is required. Refer to the appropriate
diagnostic information.

TRACTION CONTROL INDICATOR

DESCRIPTION

TRACTION CONTROL INDICATOR

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

Fig. 38: Traction Control Indicator
Courtesy of CHRYSLER LLC

A traction control indicator is standard equipment on all instrument clusters. This indicator is located near the
bottom of the speedometer dial face of the cluster overlay, directly below the speedometer needle hub.

The traction control indicator consists of a stencil-like cutout of the International Control and Display Symbol
icon for Stability - Anti-Spin in the opaque layer of the instrument cluster overlay. The dark outer layer of the
overlay prevents the indicator from being clearly visible when it is not illuminated. An amber Light Emitting
Diode (LED) behind the cutout in the opaque layer of the overlay causes the indicator to appear in amber
through the translucent outer layer of the overlay when it is illuminated from behind by the LED, which is
soldered onto the instrument cluster electronic circuit board.

The traction control indicator is serviced as a unit with the instrument cluster.

OPERATION

TRACTION CONTROL INDICATOR

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 the instrument cluster logic circuit 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, 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 indicator will always be 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 circuitry. The instrument cluster will turn ON the traction control indicator for the
following reasons:



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.



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 will be illuminated. The indicator can be flashed ON and OFF, or
illuminated solid, as dictated by the CAB message. The indicator remains illuminated solid or continues
to flash 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.



Actuator Test - Each time the cluster is put through the actuator test, the traction control indicator will be
turned 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 traction control switch 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
Electro Mechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN).

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

For proper diagnosis of the traction control switch, the ESP/BAS/TCS, the CAB, the EMIC, the CAN data bus
or the electronic communication related to traction control indicator operation a diagnostic scan tool is required.
Refer to the appropriate diagnostic information.

TRANS TEMP INDICATOR

DESCRIPTION

TRANSMISSION OVERTEMP INDICATOR

Fig. 39: Identifying Transmission Overtemp Indicator
Courtesy of CHRYSLER LLC

A transmission over-temperature indicator is standard equipment on all instrument clusters. However, on
vehicles not equipped with an optional automatic transmission, this indicator is electronically disabled. This
indicator is located near the bottom of the speedometer dial face of the cluster overlay, just right of center.

The transmission over-temperature indicator consists of a stencil-like cutout of the International Control and
Display Symbol icon for Transmission Temperature in the opaque layer of the instrument cluster overlay. The
dark outer layer of the overlay prevents the indicator from being clearly visible when it is not illuminated. A red
Light Emitting Diode (LED) behind the cutout in the opaque layer of the overlay causes the indicator to appear
in red through the translucent outer layer of the overlay when it is illuminated from behind by the LED, which
is soldered onto the instrument cluster electronic circuit board.

The transmission over-temperature indicator is serviced as a unit with the instrument cluster.

OPERATION

TRANSMISSION OVERTEMP INDICATOR

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 a transistor on the instrument cluster circuit board based upon cluster programming
and electronic messages received by the cluster from the Powertrain Control Module (PCM) over the Controller
Area Network (CAN) data bus.

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

The transmission over-temperature indicator Light Emitting Diode (LED) 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 LED
will always be OFF when the ignition switch is in any position except ON or START. The LED only
illuminates when it is provided a path to ground by the instrument cluster transistor. The instrument cluster will
turn ON the transmission over-temperature indicator for the following reasons:



Bulb Test - Each time the ignition switch is turned to the ON position the transmission over-temperature
indicator is illuminated for about two seconds as a bulb test.



Trans Over-Temp Indicator Lamp-On Message - Each time the cluster receives an electronic trans
over-temp indicator lamp-ON message from the PCM indicating that the transmission fluid temperature
is 135°C (275°F) or higher, the indicator will be illuminated and a single chime tone is sounded. The
indicator remains illuminated until the cluster receives a lamp-OFF message from the PCM, 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 PCM.



Actuator Test - Each time the cluster is put through the actuator test, the transmission over-temperature
indicator will be turned 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 PCM continually monitors the transmission temperature sensor to determine the transmission operating
condition. The PCM then sends the proper lamp-ON or lamp-OFF message to the Electro Mechanical
Instrument Cluster (EMIC) (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 further diagnosis of the transmission over-temperature indicator or the instrument cluster circuitry
that controls the LED, see DIAGNOSIS AND TESTING.

For proper diagnosis of the transmission temperature sensor, the PCM, the EMIC, 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.

TURN SIGNAL INDICATOR

DESCRIPTION

TURN SIGNAL INDICATOR

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro