Question about 1997 Dodge Caravan

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The entire gage panel (speedometer, fuel level, gages,...)will go completely blank, sometimes for lengthy periods of time (weeks). I think it's related to the electrical component of the sliding doors that unexpectedly will do this clicking thing. Also, the precursor to the gages going blank is that the Check Engine light will go on and then the ABS light will come on. Sometimes I notice that when there is percipitation this seems to be a prevalent problem, but not consistently.

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  • cyndimackey Jun 25, 2009

    Thanks for your quick reply :) Do you know how involved and costly these things are to repair?
    On the same vehicle I am experiencing air conditioning issues. The air blows, but never cools. Is this a freon issue? Are there places that will check the freon for free? If I need a recharge, any insight as to what that would cost? I have not been down this road before!

    Thanks again!
    Cyndi

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96 Dodge caravan. speedometer,fuel gage and temperature gage first flickering then ok for 4 or 5 months then happened again and few months they don't come back at all. my mechanic is stumped. changed all the relays. (used parts). checked connections. now my ac lights are blinking, abs and check engine lights on.i need help any ideas. obviously i would get another car if i could.

Posted on Jul 13, 2009

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I just got through checking out the same van. It is most likely the instrument cluster or the bcm. Or even both.

Posted on Jun 24, 2009

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1 Answer

Where is the fuse located for the gages in a 2006 cadillac cts


Doesn't have a fuse just for the gauges . B+ power supply for the whole instrument cluster . Gauge info comes from the BCM - body control module an the PCM - powertrain control modules over serial data network (GMLAN ) The instrument cluster has electronics inside ,plus software . GM did have stepper motor problems in their instrument clusters from 2003 to 2006 . Your best bet , take it to a qualified repair shop.
How to repair GM Instrument Cluster Speedometer Gauge Stepper
Engine Coolant Temperature Gage
The engine control module (ECM) sends the coolant temperature to the instrument panel cluster (IPC) via serial data circuit. The IPC receives serial data messages from the BCM indicating the engine coolant temperature. The engine coolant temperature (ECT) gage, if equipped, defaults to 75°C (160°F) or below if:
• The ECM detects a malfunction in the ECT sensor circuit.
• The IPC detects a loss of serial data communications with the ECM.
Refer to Cooling System Description and Operation for more information.
Speedometer
The instrument panel cluster (IPC) displays the vehicle speed based on the information from the engine control module (ECM). The ECM sends a 4,000 pulse per mile signal to the cluster discretely. The IPC calculates the vehicle speed using the time difference between consecutive pulses. The speedometer will default to zero if the time duration since the last speed pulse is greater than or equal to one second.

Fuel Gage Description and Operation
The ECM uses the signal circuits of the primary and secondary fuel level senders to calculate the percentage of fuel remaining in the fuel tank. The ECM supplies 5 volts via the 5 volt reference circuit and also provides a low reference to the primary and secondary fuel level senders. When the fuel tank is full, the resistance of both fuel level senders are high and the ECM senses a high signal voltage on both the signal circuits of the primary fuel level sender and the secondary fuel level sender. When the fuel tank is empty, the resistance of both fuel level senders are low and the ECM senses a low signal voltage on both the signal circuits of the primary fuel level sender and the secondary fuel level sender. The engine control module (ECM) sends fuel level information to the instrument panel cluster (IPC) via serial data circuit. The instrument panel cluster (IPC) displays the fuel level information in the fuel gage. When the fuel level is less than a predetermined value, the low fuel message displays in the driver information center (DIC).
The fuel gage defaults to empty if:
• The ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of serial data communications with the ECM.

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Do i have to drop the gas tank to change the gas pump on a 2011 gmc acadia? Also if the fuel level sensor is bad will the car shut down if the gage says it is emty but it is not?


Yes the fuel tank has to come out to change the fuel pump. But are you sure that is the problem ? Your vehicle has a Fuel Pump Flow Control Module (electronic's ) Or is it just your fuel level sensor you want to replace ? And to your question of if the fuel level sensor is bad will the car shut down if the gage says it is emty but it is not? No ,this will not shut down the vehicle. You probably have no idea of the complexity of the electronic's involved an the thing's that can cause the gauge not to work .
Fuel Gage
The instrument panel cluster (IPC) displays the fuel level as determined by the ECM. The IPC receives a serial data message from the ECM indicating the fuel level percent. The fuel gage defaults to empty if:
• The ECM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of serial data communications with the BCM
• The BCM detects a loss of serial data communications with the ECM
When the fuel level is less than a pre-determined value, the low fuel indicator illuminates in the IPC.
Unless you have a factory or professional type scan tool your better off taking your vehicle to a qualified repair shop.

Fuel Gage Inaccurate or Inoperative
Circuit/System Description
The fuel level sender changes resistance based on the fuel level. The engine control module (ECM) monitors the signal circuit of the fuel level sender to determine fuel level. When the fuel tank is full, the sender resistance is low and the ECM senses a low signal voltage. When the fuel tank is empty, the sender resistance is high and the ECM senses a high signal voltage. The ECM uses the signal circuit of the fuel level sender in order to calculate the remaining fuel level percent in the tank. The ECM sends the fuel level message via the serial data circuit to the body control module (BCM). The BCM sends the fuel level percent to the instrument panel cluster (IPC) via the serial data circuit for display on the fuel gage.

Circuit
Short to Ground
High Resistance
Open
Short to Voltage
Signal Performance
Fuel Level Sensor Signal
P0462
1
P0463, P0464
P0463
P0461
Fuel Level Sensor Low Reference
--
1
P0463, P0464
P0463
P0461
1. Fuel Gage Inaccurate or Inoperative

Do you know what a DTC is ? diagnostic trouble code !

Apr 14, 2018 | 2011 GMC Acadia

1 Answer

My 2000 Chevy s15 Rpm and Gas Gauge is not working


I didn't see an s15 in that model year, in my database?
If the speedometer works but the tach doesn't, I think something is wrong with instrument cluster?
GM has had a problem with fuel gage sending units. The sending units are not hard wired to instrument cluster, they send signal to pcm, the pcm sends serial data to instrument cluster, telling the cluster the gage settings.
It may be possible to use different size resistors in place of the fuel level sending unit, to see if fuel gage reacts properly to different resistors, if the gage reacts properly, then I think the problem is the fuel gage sending unit.

Nov 02, 2016 | Chevrolet Cars & Trucks

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2002 chevy malibu cranks wont start. fuel and temp gauge dont work. radio reads cal


Cranks won't start , Did you check for spark ,fuel pressure ?
Radio Setup .Will the vehicle communicate with a scan tool ? Fuel an temp gauges not working are probably bad step motors inside the instrument cluster that controls the gauges . Where do the gauges read 0 or something else ?
Engine Coolant Temperature Gage
The IPC displays the engine coolant temperature as determined by the PCM. The body control module (BCM) receives a class 2 message from the PCM indicating the engine coolant temperature. The BCM converts the engine coolant temperature into a percent gage deflection. The IPC receives a message from the BCM via the serial peripheral interface (SPI) indicating the requested gage position. The engine coolant temperature gage defaults to 38°C (100°F) or below if:
?€¢
The PCM detects a malfunction in the engine coolant temperature sensor circuit.


?€¢
The BCM detects a loss of class 2 communications with the PCM.


?€¢
The IPC detects a loss of SPI communications with the BCM.

Fuel Gage
The IPC displays the fuel level as determined by the PCM. The body control module (BCM) receives a class 2 message from the PCM indicating the fuel level percent. The BCM converts the fuel level percent into a percent gage deflection. The IPC receives a message from the BCM via the serial peripheral interface (SPI) indicating the requested gage position. The fuel gage defaults to E (empty) if:
?€¢
The PCM detects a malfunction in the fuel level sensor circuit.


?€¢
The BCM detects a loss of class 2 communications with the PCM.


?€¢
The IPC detects a loss of SPI communications with the BCM.

When the fuel level is less than a pre-determined value, the low fuel indicator illuminates.
DTC P0462
The fuel level sensor changes resistance based on fuel level. The PCM monitors the signal circuit of the fuel level sensor in order to determine fuel level. When the fuel tank is full, the sensor resistance is high and the PCM senses a high signal voltage. When the fuel tank is empty, the sensor resistance is low and the PCM senses a low signal voltage. The PCM uses the signal circuit of the fuel level sensor in order to calculate the total remaining fuel in the tank. The PCM sends the fuel level percent via the class 2 serial data circuit to the body control module (BCM). The BCM converts this data and sends a fuel gage percent deflection to the IPC via the serial peripheral interface (SPI) in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics.

Have
For the DE 100 series radio, complete the following procedure, using a scan tool, in order to properly set up communication:

  1. At the Main Menu screen, select: Diagnostics.
  2. At the Vehicle Identification screen, select the following options:
  3. ?€¢
    Model Year


    ?€¢
    Passenger Car

  4. At the System Selection Menu screen, select: Body.
  5. At the Vehicle Identification screen, select the Platform type.
  6. At the Body screen, select: Radio.
  7. At the Radio screen, select: Special Functions.
  8. At the Special Functions screen, select: Radio Setup.
  9. At the Radio Setup screen, press ENTER. The following test will set up a new or existing radio.
  10. Select one of the following options:
  11. ?€¢
    USA/Canada


    ?€¢
    Export

  12. Press the ENTER key.
  13. Verify that the scan tool displays "Test in Progress."
  14. Verify that the scan tool displays "Test Completed Successfully."
  15. Press EXIT on the scan tool.
Important: The radio set up will configure the following systems:
?€¢
LEARN VIN


?€¢
Diagnostic Trouble Codes


?€¢
Class 2 Radio Messages


?€¢
Country Code


?€¢
Chime Volume


?€¢
Chime Level


?€¢
12/24 Hour Clock

Without learning the VIN, the radio will display a locked message (LOC).
The radio setup procedure will also clear the following messages:
?€¢
CAL


?€¢
CAL ERR


?€¢
CALIBRATE

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1 Answer

My fuel gage registers empty when I just fill with gas


Most likely it is either the fuel level sending unit attached to the fuel pump or the stand alone unit (there are two sending units, both located in the tank), or, as counter-intuitive as it seems, it could be the speedometer assembly. Personally, I lean toward the latter.

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GMC Yokon XL Fuel gage


Problem may be with the level sending unit, which is part of the fuel pump assembly in the fuel tank. You can check this with a good code reader that will give you live data from this unit and compare it with what the gauge is saying. If they don't match, you can try a good quality fuel system cleaner to see if that solves the problem. If they do match, then the problem is probably still in your instrument panel (IP) or engine computer.

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Fuel level gauge


some of this vehicles have a computer system, that will allow you to diagnose the fuel gage with an aftermarket sacan tool,
than most of auto repairs have, but i will recomend you to check also the conector by the fuel pump and make sure there is not any corosion or melting circuit inside the conector,

what the scan tool does is triger your gage and that way you will know if you have a bad gage.

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