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The IPC displays the fuel level as determined by the PCM. The IPC receives a class 2 message from the PCM indicating the fuel level percent. The fuel gage defaults to empty if:
• The PCM detects a malfunction in the fuel level sensor circuit.
• The IPC detects a loss of class 2 communications with the PCM.
When the fuel level is less than a pre-determined value, the CHECK GAGES indicator illuminates.
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 IPC in order to control the fuel gage. The fuel level information is also used for misfire and EVAP diagnostics
DTC P0463 (3.8L)
Belt could have come off. if the belt did break or come of it would be very easy to spin pedals. Flywheel ( brake ) could have jammed up. Loosen the covers and look for the brake cable that's connected to the resistance motor. Then run the resistance up to 20. If cable feels loose , the brake is stuck. Sometimes you can pull on the cable and it will free it up.
The HVAC mode selections on these are controlled by an electric stepper
motor that receives commands from the BCM (body control module). The
BCM decides where the air door should be by looking at where the dash
control input is.
Each mode selected has a different resistance level. From low
resistance to high resistance: Panel, Bi-Level, Floor, Mix and Defrost,
with Defrost as the highest resistance (~100K ohms). A high resistance
or open circuit would probably default the system to defrost no matter
what position the mode control was set to.
If the control is dirty or there is a connection issue, this could
cause this problem. Does playing with the control make any difference?
The BCM can store fault codes with HVAC releated information. The
system can be reset and recalibrated with a battery disconnect, this
will also erase any fault codes.
I would start by looking at the dash mode control.
fuel gauges work using a variable resistor. Typically, when the fuel level is low, the fuel level sender is working at a high resistance. When the tank is full, the sender is working with a low resistance. Anything that increases the resistance in the circuitry will lead to a false low reading. Dirty or corroded wire terminals in the fuel sender circuit would raise the resistance. If you can remove the fuel sender unit from the tank, you can use an ohm meter to check its resistance. When the float is low, you should see a resistance of around 100 ohms. When the float is up (tank full) you should see a low resistance of about 2-5 ohms.
Unplug unit and remove the motor shroud you will have to do DC Amp Measurement. Measure on the hot DC lead (usually red) going from the controller to the drive motor. If you have a simple multi-meter with a DC amp test setting the best way to test is to put the meter inline on the red motor lead with alligator clips. If you have a more expensive clamp meter, clamp the meter around the red motor wire. Run the machine at 2.5 MPH without a person on the belt. If the motor and drive system are healthy, you should have a reading in the 2-3 amp range. Then walk on the treadmill at the same speed. With a person of average size (around 200 lbs.) you should have a reading in the 6-8 amp range if the belt is good. The readings will fluctuate more with a load but you are looking for an average reading but you shouldn't see spikes above 10 amps. If the amp readings are high without a load, you could have a problem with high resistance in the motor, a bad bearing, or over-tightened belts. Regular readings without a load but high readings with a load indicate a worn belt and/or deck.
When the resistance setting changes, the motor will
be heard. To prevent damage to the motor, do not
pull any of the cables while the resistance setting
is changing. If the motor has difficulty adjusting the
resistance level and no cable is being pulled, there
may be too much tension on the Upper Cable (110).
Adjust the tension as described below.
To decrease the tension on the Upper Cable (110),
turn the two 3/8” x 38mm Tension Screws (106) twice,
counterclockwise. Select the desired resistance setting.
Repeat this step if necessary.
P2074-manifold Pressure/throttle Position Correlation
CORRELATION - HIGH FLOW/VACUUM LEAK
When Monitored: Engine Running, during all drive modes.
Set Condition: If vacuum drops below 1.5 Hg with engine RPM greater than 2000 RPM
at closed throttle.
HIGH RESISTANCE IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN MAP (K7) 5 VOLT SUPPLY CIRCUIT
HIGH RESISTANCE IN (K1) MAP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K1) MAP SIGNAL CIRCUIT
HIGH RESISTANCE IN (K4) MAP GROUND CIRCUIT
TP SENSOR OPERATION
HIGH RESISTANCE IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
RESISTANCE TO GROUND IN (K6) TP SENSOR 5 VOLT SUPPLY CIRCUIT
HIGH RESISTANCE IN (K22) TP SIGNAL CIRCUIT
RESISTANCE TO GROUND IN (K22) TP SENSOR SIGNAL CIRCUIT
HIGH RESISTANCE IN TP (K4) SENSOR GROUND CIRCUIT