Dodge Nitro. Manual - part 809

 

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Dodge Nitro. Manual - part 809

 

 

circuit.  

More Than Full Stop Message - Each time the cluster receives a fuel level message indicating the fuel 
level in the fuel tank is more than the F (or Full) gauge needle stop position for five consecutive seconds, 
the gauge needle is moved to the low end of the gauge scale and the low fuel indicator is illuminated 
immediately. This input would indicate that the fuel level sense input to the TIPM is an open circuit.  

The TIPM continually monitors the fuel tank sending unit to determine the level of fuel in the fuel tank. The 
TIPM then sends the proper electronic fuel level message to the Electro Mechanical Instrument Cluster (EMIC) 
(also known as the Cab Compartment Node/CCN) and other electronic modules in the vehicle over the 
Controller Area Network (CAN) data bus. The TIPM will store a Diagnostic Trouble Code (DTC) for any fault 
detected in the fuel level sense circuit. 

For proper diagnosis of the fuel tank sending unit, the TIPM, the EMIC, the CAN data bus or the electronic 
communication related to low fuel indicator operation or fuel level data processing a diagnostic scan tool is 
required. Refer to the appropriate diagnostic information. 

LOW OIL PRESSURE INDICATOR 

DESCRIPTION 

LOW OIL PRESSURE INDICATOR 

Fig. 27: Low Oil Pressure Indicator 
Courtesy of CHRYSLER LLC 

A low oil pressure indicator is standard equipment on all instrument clusters. This indicator is located near the 
bottom of the speedometer dial face of the cluster overlay, just left of center. 

The low oil pressure indicator consists of a stencil-like cutout of the International Control and Display Symbol 
icon for Engine Oil 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 low oil pressure indicator is serviced as a unit with the instrument cluster. 

OPERATION 

LOW OIL PRESSURE INDICATOR 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

  

The low oil pressure indicator gives an indication to the vehicle operator when the engine oil pressure reading 
reflects a condition requiring immediate attention. 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. 

The low oil pressure 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 low oil 
pressure indicator for the following reasons: 

Engine Oil Pressure Low Message - Each time the cluster receives an electronic engine oil pressure 
message from the PCM indicating the pressure is about 6.9 kPa (1 psi) or lower, the low oil pressure 
indicator will be illuminated. The indicator can be flashed ON and OFF, or illuminated solid, as dictated 
by the PCM message. The indicator remains illuminated solid or flashing until the cluster receives a 
message from the PCM indicating that the pressure is above about 6.9 kPa (1 psi), or until the ignition 
switch is turned to the OFF position, whichever occurs first. The cluster will only turn the indicator ON in 
response to low engine oil pressure if the engine speed is greater than zero.  

Actuator Test - Each time the cluster is put through the actuator test, the low oil pressure 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 engine oil pressure sensor to determine the engine oil pressure. The PCM 
then sends the proper messages to the Electro Mechanical Instrument Cluster (EMIC) (also known as the Cab 
Compartment Node/CCN). If the EMIC turns ON the indicator after the bulb test, it may indicate that the engine 
or the engine oiling system requires service. 

For proper diagnosis of the engine oil pressure sensor, the PCM, the EMIC, the CAN data bus or the electronic 
communication related to low oil pressure indicator operation a diagnostic scan tool is required. Refer to the 
appropriate diagnostic information. 

MALFUNCTION INDICATOR LAMP (MIL) 

DESCRIPTION 

MALFUNCTION INDICATOR 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

  

Fig. 28: Malfunction Indicator Lamp 
Courtesy of CHRYSLER LLC 

A Malfunction Indicator Lamp (MIL) is standard equipment on all instrument clusters. This indicator is located 
within the odometer Vacuum Fluorescent Display (VFD) unit. 

The MIL indicator consists of the International Control and Display Symbol icon for Engine in the VFD 
display. The odometer VFD unit 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 dial face of the cluster overlay. 
The dark lens over the VFD unit prevents the indicator from being clearly visible when it is not illuminated. The 
MIL icon appears in an amber color when it is illuminated by the cluster electronic circuit board, and the MIL 
as well as all of the odometer VFD information is illuminated at full (daytime) brightness and cannot be 
dimmed until the MIL is extinguished. 

The MIL is serviced as a unit with the VFD unit in the instrument cluster. 

OPERATION 

MALFUNCTION INDICATOR 

The Malfunction Indicator Lamp (MIL) gives an indication to the vehicle operator when the Powertrain Control 
Module (PCM) has recorded a Diagnostic Trouble Code (DTC) for an On-Board Diagnostics II (OBDII) 
emissions-related circuit or component malfunction. The MIL is controlled by the instrument cluster circuit 
board based upon cluster programming and electronic messages received by the cluster from the PCM over the 
Controller Area Network (CAN) data bus. 

The MIL 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 energized by the instrument cluster logic 
circuit. The instrument cluster will turn ON the MIL for the following reasons:

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

  

Bulb Test - Each time the ignition switch is turned to the ON position the indicator is illuminated for 
about 15 seconds as a bulb test. The entire bulb test is a function of the PCM.  

MIL Lamp-On Message - Each time the cluster receives an electronic MIL lamp-ON message from the 
PCM, the indicator will be illuminated. The indicator can be flashed ON and OFF, or illuminated solid, as 
dictated by the PCM message. For some DTCs, if a problem does not recur, the PCM will send a lamp-
OFF message automatically. Other DTCs may require that a fault be repaired and the PCM be reset 
before a lamp-OFF message will be sent. For more information on the PCM, and the DTC set and reset 
parameters, refer to EMISSIONS CONTROL .  

Communication Error - If the cluster receives no lamp-ON or lamp-OFF messages from the PCM for 
10 consecutive message cycles, the MIL is illuminated by the instrument cluster to indicate a loss of bus 
communication. The indicator remains controlled and illuminated by the cluster until a valid message is 
received from the PCM.  

Actuator Test - Each time the cluster is put through the actuator test, the MIL 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 PCM continually monitors the fuel and emissions system circuits and sensors to decide whether the system 
is in good 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 EMIC turns 
ON the MIL after the bulb test, it may indicate that a malfunction has occurred and that the fuel and emissions 
systems require service. 

For proper diagnosis of the fuel and emissions systems, the PCM, the EMIC, the CAN data bus or the electronic 
communication related to MIL operation a diagnostic scan tool is required. Refer to the appropriate diagnostic 
information. 

ODOMETER 

DESCRIPTION 

ODOMETER/TRIP ODOMETER 

 

2007 Dodge Nitro R/T 

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

  

 

 

 

 

 

 

 

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