Dodge Nitro. Manual — part 815

Fig. 40: Turn Signal Indicator
Courtesy of CHRYSLER LLC

Two turn signal indicators, one right and one left, are standard equipment on all instrument clusters. The turn
signal indicators are located near the bottom of the speedometer dial face of the cluster overlay, one on the right
and one on the left. Illumination of this indicator may also be accompanied by the display of a turn signal-on
warning textual message in the cluster reconfigurable Vacuum Fluorescent Display (VFD) unit.

Each turn signal indicator consists of a stencil-like cutout of the International Control and Display Symbol icon
for Turn Warning in the opaque layer of the instrument cluster overlay. The dark outer layer of the overlay
prevents these icons from being clearly visible when they are not illuminated. A green Light Emitting Diode
(LED) behind each cutout in the opaque layer of the overlay causes the indicator to appear in green 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 turn signal indicators are serviced as a unit with the instrument cluster.

OPERATION

TURN SIGNAL INDICATOR

The turn signal indicators give an indication to the vehicle operator that the turn signal (left or right indicator
flashing) or hazard warning (both left and right indicators flashing) have been selected and are operating. These
indicators are controlled by transistors on the instrument cluster electronic circuit board based upon the cluster
programming and electronic messages received from the Totally Integrated Power Module (TIPM) over the
Controller Area Network (CAN) data bus.

Each turn signal indicator Light Emitting Diode (LED) is completely controlled by the instrument cluster logic
circuit, and that logic will allow this indicator to operate whenever the instrument cluster receives a battery
current input on the fused B(+) circuit. Therefore, each LED can be illuminated regardless of the ignition switch
position. The LED only illuminates when it is provided a path to ground by the instrument cluster transistor.

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

The instrument cluster will turn ON the turn signal indicators for the following reasons:



Turn Signal Indicator Lamp-On Message - Each time the cluster receives an electronic right or left
turn signal-ON message from the TIPM over the CAN data bus, the appropriate turn signal indicator will
be flashed ON and OFF. The TIPM also sends the appropriate electronic message to the cluster to control
the flash rate of the turn signal indicators, as well as to control the click rate of an electromechanical relay
soldered onto the cluster electronic circuit board that emulates the sound emitted by a conventional turn
signal flasher. The turn signal indicators continue to flash ON and OFF until the cluster receives a lamp-
OFF message from the TIPM, or until the ignition switch is turned to the OFF position, whichever occurs
first.



Hazard Warning Indicator Lamp-On Message - Each time the cluster receives an electronic hazard
warning-ON message from the TIPM over the CAN data bus, both turn signal indicators will be flashed
ON and OFF. The TIPM also sends the appropriate electronic messages to the cluster to control the flash
rate of the right and left turn signal indicators, as well as to control the click rate of an electromechanical
relay soldered onto the cluster electronic circuit board that emulates the sound emitted by a conventional
hazard warning flasher. The turn signal indicators continue to flash ON and OFF until the cluster receives
a hazard warning-OFF message from the TIPM.



Turn Signal-On Textual Warning Message - When the cluster detects that a turn signal has been active
continuously for 1.6 kilometers (1 mile) with the vehicle speed greater than 22 kilometers-per-hour (15
miles-per hour) a chime tone will be sounded and, if the vehicle is so equipped, a TURN SIGNAL ON
textual message will appear within the instrument cluster reconfigurable Vacuum Fluorescent Display
(VFD) unit.



Lamp Out Mode - If the TIPM detects an ineffective turn signal lamp or circuit, it increases the flash
rate for the remaining operative turn signals and sends an electronic message to the instrument cluster. To
provide an indication of the problem to the vehicle operator the instrument cluster then increases the flash
rate of the turn signal indicators, the click rate of the electromechanical relay and, if the vehicle is so
equipped, displays a TURN SIGNAL LAMP OUT textual message in the reconfigurable VFD unit.



Actuator Test - Each time the cluster is put through the actuator test, the turn signal indicators will be
turned ON, then OFF again during the bulb check portion of the test to confirm the functionality of each
LED and the cluster control circuitry.

The Electro Mechanical Instrument Cluster (EMIC) (also known as the Cab Compartment Node/CCN)
continually monitors the electronic messages from the TIPM to determine the proper turn signal and hazard
warning indicator operation.

For proper diagnosis of the turn signal and hazard warning system, the multi-function switch, the TIPM, the
EMIC, the CAN data bus or the electronic communication related to turn signal indicator operation a diagnostic
scan tool is required. Refer to the appropriate diagnostic information.

WAIT-TO-START INDICATOR

DESCRIPTION

WAIT-TO-START INDICATOR

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

Fig. 41: Wait-To-Start Indicator
Courtesy of CHRYSLER LLC

A wait-to-start indicator is standard equipment on all instrument clusters. However, on vehicles not equipped
with an optional diesel engine, 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 wait-to-start indicator consists of a stencil-like cutout of the International Control and Display Symbol icon
for Diesel Preheat 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 wait-to-start indicator is serviced as a unit with the instrument cluster.

OPERATION

WAIT-TO-START INDICATOR

The wait-to-start indicator gives an indication to the vehicle operator when the diesel engine is too cool for
efficient and reliable engine starting, and the engine glow plugs are energized in their pre-heat operating mode.
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 wait-to-start 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 wait-to-start
indicator for the following reasons:



Wait-To-Start Indicator Lamp-On Message - Each time the cluster receives an electronic wait-to-start
indicator lamp-ON message from the PCM indicating that the air temperature is too cool for efficient
and reliable engine starting and the glow plugs are energized in their pre-heat mode, the wait-to-start
indicator will be illuminated. The indicator remains illuminated until the cluster receives a lamp-OFF

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro

message from the PCM, until the PCM detects that the engine is running, 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 wait-to-start 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 glow plug control circuits to determine when they are energized in their pre-
heat operating mode. 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).

For proper diagnosis of the glow plug control circuits, the PCM, the EMIC, the CAN data bus or the electronic
communication related to wait-to-start indicator operation a diagnostic scan tool is required. Refer to the
appropriate diagnostic information.

WATER-IN-FUEL INDICATOR

DESCRIPTION

WATER-IN-FUEL INDICATOR

Fig. 42: Identifying Water-In-Fuel Indicator
Courtesy of CHRYSLER LLC

A water-in-fuel indicator is standard equipment on all instrument clusters. However, on vehicles not equipped
with an optional diesel engine, this indicator is electronically disabled. This indicator is located near the bottom
of the speedometer dial face of the cluster overlay, just left of center.

The water-in-fuel indicator consists of a stencil-like cutout of the International Control and Display Symbol
icon for Water In Fuel 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.

2007 Dodge Nitro R/T

2007 ACCESSORIES AND EQUIPMENT Instrument Cluster - Service Information - Nitro