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