04 1500 ram 4.7

ok mech. , join a real Saturn forum.?
rule #1 is fuse first. all must be good.
what does gauges dead mean sure ,meters dead but is the cluster dead, IP cluster 100% dead, and CEL lamp self test key on dead.>?
scan it yet? that is rule 2 (assumes battery is good /charged)
scan it but DLC OBD2 Pin 16 needs 12vdc and fuse blow there scan tools are born dead. back to rule #1 again.

does engine crank and run and drive.?
do head lamps work?
does the radio work. ?
heater blower blows.?
and is the ODOM dead./?????????/ if comm's or fuse dead)
new battery not connected backwards now or before.

many electronics blow up backwards, see some do have a diode on the VCC/VDD rails in electronics to stop that but some do not.!


to diagnose any car made we take note of all things good , bad or ugly seen. all facts matter and reduce the testing needed.

all matter, even head lamps work key on or off.
many clusters now are on a CAN bus, network BINGO HERE>
, ONE OF HE FIRST IN USA.
USA spec, car or NOT. (gm exports cars ww)
I will now punch up L300 in the service manual just for you
gauges.?
speedo dead
tachmeter ded
fuel dead
engine temp, dead?
ODOMETER DEAD that too is meter but proves power and can bus not dead if works, does this work ?

here is the FSM page words for how that all works

"The instrument cluster receives information via the Class 2 serial data link from the 4 cylinder (L61) Body Control Module (BCM), the powertrain control module (PCM), and the sensing and diagnostic module (SDM). On V6 (L81) engine applications, the information from the engine control module (ECM) and the transaxle control module (TCM) is sent to the BCM over the CAN serial data link where it is converted to a Class 2 message and sent to the cluster. The information from the electronic brake/traction control module (EBTCM) is sent to the BCM, where it is converted into a Class 2 message and sent to the cluster."


NOW THE NITTY GRITTY FACTS HARD
ign1 FUSE NOT BLOW OR IP IS DEAD, ZERO POWER TO IT.
the can bus nor serial class 2 bus must not be dead.
or IP goes dead.
all needle meters go dead too. like that or fuse IGN1 dead.
or PCM /ECU nor and more.
the whole IP runs off a network. real. and very modern that year.
IGN1 fuse must not be blown.

Hi Trevor , Need more information from you . When you say it won't start , won't start how ? Two way's you could have a no start - engine cranks - no start or a no crank - no start . Meaning that when you turn the key to start ,what happens ? Does the starter engage an spin the engine ? or nothing happens .

No data to the code reader ? Does it power up ? Battery voltage at pin #16 at the DLC ? Volt gauge an fuel gauge not working ? This info comes to the instrument cluster over the PCI data bus from the PCM - engine computer . Could easily have a PCM problem , a shorted sensor on the engine that get's power from the five volt reference circuit from the PCM . Do you know how to use a voltmeter to test electrical circuit's ? Video's on youtube showing how to test 5 volt ref. circuit .
http://www.atraonline.com/gears/2010/2010-05/2010_5_60.pdf

U codes pertain to serial data network . All the control module's on the vehicle share info. , send commands etc... on the data bus . U110C-NO FUEL LEVEL BUS MESSAGE RECEIVED For a complete wiring diagram, refer to the Wiring Information.

Theory of Operation

The fuel level signal is a direct input to the Cluster. The fuel level signal is sent to the TIPM over the CAN B bus circuit. The NGC receives the fuel level signal from the TIPM over the CAN C bus circuit.

1. When Monitored: Ignition on.
   
2. Set Condition: When the PCM does not receive a fuel level signal from the TIPM over the CAN C circuit. The circuit is constantly monitored.
   

3. Possible Causes

   CAN C BUS CIRCUIT OPEN OR SHORTED TOTALLY INTEGRATED POWER MODULE PCM
4. OPERATION The ElectroMechanical Instrument Cluster (EMIC) in this model also includes the hardware and software necessary to serve as the electronic body control module and is sometimes referred to as the Cab Compartment Node or CCN. The following information deals primarily with the instrument cluster functions of this unit. Additional details of the electronic body control functions of this unit may be found within the service information for the system or component that the CCN controls. For example: Additional details of the audible warning functions of the CCN are found within the Chime/Buzzer service information.
   The CCN is designed to allow the vehicle operator to monitor the conditions of many of the vehicle components and operating systems. The gauges and indicators in the CCN provide valuable information about the various standard and optional powertrains, fuel and emissions systems, cooling systems, lighting systems, safety systems and many other convenience items. The CCN is installed in the instrument panel so that all of these monitors can be easily viewed by the vehicle operator when driving, while still allowing relative ease of access for service.
   The microprocessor-based CCN hardware and software uses various inputs to control the gauges and indicators visible on the face of the cluster. Some of these inputs are hard wired, but most are in the form of electronic messages that are transmitted by other electronic modules over the Controller Area Network (CAN) data bus and the Local Interconnect Network (LIN) data bus. The CCN is the master of the LIN bus and there are five modules that talk to the CCN (Smart Glass Module (SGM) - PT27 only, Heated Seat Module (HSM), Remote Compass Module (RCM), Steering Column Control Module (SCCM), and the Accessory Switch Bank Module (ASBM) (Refer to 08 - Electrical/Electronic Control Modules/COMMUNICATION - Operation).
   The CCN microprocessor smooths the input data using algorithms to provide gauge readings that are accurate, stable and responsive to operating conditions. These algorithms are designed to provide gauge readings during normal operation that are consistent with customer expectations. However, when abnormal conditions exist such as high coolant temperature, the algorithm can drive the gauge pointer to an extreme position and the microprocessor can sound a chime through the on-board audible tone transducer to provide distinct visual and audible indications of a problem to the vehicle operator. The CCN may also produce audible warnings for other electronic modules in the vehicle based upon electronic tone request messages received over the CAN/LIN data bus. Each audible warning is intended to provide the vehicle operator with an audible alert to supplement a visual indication.
   The CCN circuitry operates on battery current received through a fused B(+) fuse on a non-switched fused B(+) circuit, and on battery current received through a fused ignition switch output (run-start) fuse on a fused ignition switch output (run-start) circuit. This arrangement allows the/CCN to provide some features regardless of the ignition switch position, while other features will operate only with the ignition switch in the On or Start positions. The CCN circuitry is grounded through a ground circuit of the instrument panel wire harness.
   The CCN also has a self-diagnostic actuator test capability which will test each of the CAN bus message-controlled functions of the cluster by lighting the appropriate indicators, positioning the gauge needles at several predetermined calibration points across the gauge faces, and illuminating all segments of the odometer/trip odometer/gear selector indicator Vacuum-Fluorescent Display (VFD) unit and Electronic Vehicle Information Center (EVIC). The EVIC will display the hardware/software version, and the CAN and LIN Vehicle Maintenance Monitor (VMM) used in the CCN. (Refer to 08 - Electrical/Instrument Cluster - Diagnosis and Testing).

a fuse blew.
this car has an electronic dash cluster. (with brain)
first is fuses. (check them first) (2 of them)
second is scan it. scan the PCM for DTC error !

if rpm dies, for sensors the engine dies...
The PCM runs spark and injection off 2 sensor and RPM
if they die so does spark and injection.
the cluster has self test mode, try that first?
this proves the cluster is ok.
this is covered in the FSM for your JEEP

the WJ jeep
Chapter 8J covers all this.. to great details.
page 8
fuse 17 and 22 must be good. JB box, cab.

posted now 100 of times, here it is again.
quote
The instrument cluster actuator test will put the
instrument cluster into its self-diagnostic mode. In
this mode the instrument cluster can perform a selfdiagnostic
test that will confirm that the instrument
cluster circuitry, the gauges, the PCI data bus message
controlled indicators, and the electro-luminescent
illumination lamp (if equipped) are capable of
operating as designed. During the actuator test the
instrument cluster circuitry will sweep each of the
gauge needles across the gauge faces, illuminate each
of the segments in the Vacuum-Fluorescent Display
(VFD), turn all of the PCI data bus message-controlled
indicators on and off again, and turn the electro-
luminescent illumination lamp (if equipped) on
and off again.
Successful completion of the actuator test will confirm
that the instrument cluster is operational. However,
there may still be a problem with the PCI data
bus, the Powertrain Control Module, the Airbag Control
Module (ACM), the Body Control Module (BCM),
the Controller Anti-lock Brake (CAB), the Sentry Key
Immobilizer Module (SKIM), or the inputs to one of
these electronic control modules. Use a DRBIIIt scan
tool to diagnose these components. Refer to the
appropriate diagnostic information.
If an individual indicator lamp or the electro-luminescent
illumination lamp do not illuminate during
the actuator test, the instrument cluster should be
removed. However, check that the incandescent lamp
bulb is not faulty, that the bulb holder is properly
installed on the instrument cluster electronic circuit
board, or that the electro-luminescent lamp pigtail
wire connector is properly connected to the instrument
cluster electronic circuit board before considering
instrument cluster replacement. If the bulb and
bulb holder, or the electro-luminescent lamp connection
check OK, replace the faulty instrument cluster
unit.
(1) Begin the test with the ignition switch in the
Off position.
(2) Depress the odometer/trip odometer switch button.
(3) While still holding the odometer/trip odometer
switch button depressed, turn the ignition switch to
the On position, but do not start the engine.
(4) Release the odometer/trip odometer switch button.
(5) The instrument cluster will automatically
begin the actuator test sequence, as follows:
(a) The cluster will turn on, then off again each
of the PCI data bus message controlled indicators
(except Airbag) to confirm the functionality of the
indicator and the cluster control circuitry:
(b) The cluster will sweep the needles for each of
the gauges from minimum to maximum and back
to minimum to confirm the functionality of the
gauge and the cluster control circuitry:
(c) Only on models with a premium version of
the cluster, the cluster will illuminate the electroluminescent
lamp and turn it off again to confirm
the functionality of the lamp and the cluster control
circuitry.
(d) The cluster will sequentially step the odometer/
trip odometer VFD display from all zeros
(000000) through all nines (999999) to confirm the
functionality of all VFD segments and their control
circuitry, then display the software version number,
followed by "DONE".
(6) The actuator test is now completed. The instrument
cluster will automatically exit the self-diagnostic
mode and return to normal operation at the
completion of the test, if the ignition switch is turned
to the Off position during the test, or if a vehicle
speed message indicating that the vehicle is moving
is received from the PCM over the PCI data bus during
the test.
(7) Go back to Step 1 to repeat the test, if
required
end quote.


if this passes and fuses are good
then you may have DTC errors scanned
if you scan it and you see comminications error from PCM to cluster, well that be it. ... and am not going into THAT>here.

There is not a single fuse for the fuel gauge , there are a few that power up the whole instrument cluster ! If there were a fuse out more then just your fuel gauge wouldn't work .You probably have a bad sending unit in the fuel tank or the stepper motor for that gauge is bad ! The thing to do would be to take to the dealer or some other capable ASE certified repair shop that has a up scale scan tool that can check codes in the instrument cluster ! Or you can take a chance an replace the instrument cluster !
Fuel Gage Inaccurate or Inoperative
Inspect for any stored instrument cluster Diagnostic Trouble Codes (DTCs). Are any DTCs stored in memory?
--
Go to Diagnostic Trouble Code (DTC) List/Type
Go to Step 3

3

1. Install a Scan Tool scan tool.
2. Turn the ignition switch to the RUN position.
3. Establish communication with the instrument cluster.
4. Select special functions under the main menu.
5. Select output control under special functions.
6. Select fuel gauge sweep test under output control main menu.

Does the fuel gauge perform a full sweep when commanded?
--
Go to Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.1L
or
Powertrain On Board Diagnostic (OBD) System Check in Engine Controls - 3.8L
Go to Step 4

cluster or bus wires going down, test bus voltage to cluster,if reference voltage ok to cluster then internally a cluster issue,best place to start diagnosis.

It is very possible your computer is malfunctioning. It is best to have a diagnostic test done on this to pinpoint exact problem area.

check bulkhead connecter for corrosion, cluster is your body controll module, losing signal to fuel pump module , and pcm, thios is a communication issue, volt meter wil help, back probe diagnostic connecter, pin 7, white wire, to see if signal is there, GOOD LUCK RDJRP

Not sure about the gauges problem, but "No Bus" means that the PCM or the computer can not communicate.

From the official Durango shop manual......(abbreviated)

Self Diagnosis Test

Vehicle key position is OFF ,or able to pull key out.
Hold in the trip odometer button (dont release yet)
Turn key to the ON position (one notch), but DON'T try to start the engine
Continue holding the trip button for about 10-12 seconds until CHEC appears in the odometer display
Release the trip button.
Series of three digit numeric failure codes may appear.
If no failure message appears, the self diagnostic test will proceed as described in step 6


Code Chart

110- cluster CPU,RAM,EEPROm failure, replace cluster

900-CCD data bus not operational, check CCD data bus connections at cluster, check the cluster fuses,check the CCD data bus bias, cehck the CCD data bus voltage, check the CCD data bus terminations.

920-cluster is not recieving a vehicle speed message from the PCM, check PCM software level and reflash if required, use the ($2500+) DRBIII scan tool to verify the vehicle speed message is being sent by the PCM

921-the cluster is not recieveing a distance pulse message from PCM,check PCM software level and reflash if required, use the ($2500+) DRBIII scan tool to verify the distance pulse message is being sent by the PCM

940-the cluster is not recieving an airbag lamp-on message from the ACM, check the CCD data bus connections at the ACM, check the ACM fuse.

950-cluster not recieving an ABS lamp-on message from the CAB, check CCD data bus connections at the ACM, check the ACM fuse.

960- clsuter not recieving a PRND21 message from the TCM, check the CCD data bus connections at the TCM, check the TCM fuse.

999-An error has been discovered, record the failure message, depress the trip odometer reset button to continue the Self-Diagnostic Test

Step 6
Instrument cluster will test each segment of the odometer (all first, then each one seperately)

Step 7
Bulb test

Step 8
Gauge test

Step 9
test completed

The instrument cluster will return to normal operation at the completion of test, if ignition switch turned off, or a vehicle speed message indicating movement recieved from the PCM on the CCD data bus.

Hope that help you or anyone else in future.