B1720
Symptom: The fuel gauge shows empty.The low fuel warning lamp lights up.Some of the trip computer's functions are affected.
B1720 |
Fuel level transmitter signal faulty
Fault symptom
The fuel gauge shows empty.The low fuel warning lamp lights up.
Some of the trip computer's functions are affected.
Diagnostic procedure
1. |
Connect the ISAT Scan Tool and select "READ VALUES" followed by "TANK CONTENTS".
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2. |
If the fuel level sensor signal is OK, the reading shown on the ISAT Scan Tool's display should correspond to the contents of the fuel tank. If this is the case, continue with point 7.
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3. |
If the display shows tank contents = 0, the fuel level sensor signal sent to the main instrument display panel is faulty. In this case, continue by checking the fuel level sensor, point 4.
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6. |
Plug in the fuel level sensor's connector again.
Take a reading across pins 11 and 12 on the BOB to check for continuity/shorting. The correct resistance across the pins is between 50 and 390 ohms. If this is the case, continue with point 7. If the reading obtained is outside this resistance range the wiring is faulty. Investigate the cause and rectify. |