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As per the topic title, the fuel gauge does not work on our 2004 Dispatch Van.
Strangely the Low Fuel light does work when the tank gets low. My brother keeps a gallon can in the van just in case, but so far he fills up when the light comes on & gets at least £100 in the tank.
The light working does imply the sender is working, but we are not sure. Assuming the sender is just the usual resistance type, is the light done by the electronics based on voltage or resistance ?
My iCarsoft Max doesn't seem the read the sender value, so we probably need to check the resistance before dropping the tank & testing the sender.
Any ideas welcome,
Pete
Hopefully to round this one off, we finally found an intermittent break in the wiring to the temperature sensor. The problen was about halfway between the sensor & ECU, so was intermittently connecting & failing as the loom moved with the engine movement.
We then un-wrapped the loom, and replaced the two sensor wires. The joins at each end were soldered & sleeved with heatshrink. For last 2-3 weeks the fans, temp gauge, etc have been working ok.
Doubt it's just a fan fault. They start at lower speed when the engine is cold. Also I cannot see how a fan relay short would cause coolant sender faults & Stop light flashing on the dash ?
FYI, also checked the resistance of both sensors at ambient & in boiling water. They both go from about 6-8Kohn down to few hundred ohms in boiling water, so appear to be working & same thermal curve.
Hi all, My brother's 2004 Dispatch has developed a fault with fans running constantly, temp gauge showing max with temp warning light & flashing Stop in the centre of the cluster.
We did diagnostics on the ECM (1.9L WJY LUCAS DCN2) & found "P0117 Coolant Temperature Signal Short Circuit To + Or Open Circuit"
Sensor replaced with new one - no change
Checked wiring to ECU - no shorts or broken wires
Voltage at sensor = about 2V. (sounds wrong)
Cleaned all connectors with contact cleaner
After allowing engine to cool, diagnostics said 20degC. Ran the engine, and the diagnostic temp went up to 100degC in about 3-5mins. Checked engine with IR Thermometer, and max we could find is about 60degC. Radiator top hose = 45degC. Conclusion: thermostat must be opening, but max fan speed is keeping the engine cool.
My understanding is the sensor should have 5V on one side ? Is the 5V regulator inside the ECU, or elsewhere ?
Any ideas what to check next ?
Thanks,
Pete
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