Hi wu3g5h2q,
Thank you for the donation.
Problem is not likely to be the fuel sending unit. If that is the case, the Fuel Data Center (FDC) would still illuminate.
Probable cause would be a fault with the FDC or its wiring and other communications. A loose connection is quite likely to be the cause.
FUEL DATA CENTER CONNECTOR TEST
1. Disconnect fuel data center connector. Turn ignition switch to RUN position and turn parking lights or headlights on.
2. Using a voltmeter, measure voltage between terminal "L" (Brown wire) and ground. If battery voltage is present, go to next step. If battery voltage is not present, check Brown wire for an open circuit, and check instrument panel fuse No. 7.
3. Measure voltage between terminal "P" (Orange/Black wire) and ground. If 16 volts are present, go to next step. If 16 volts are not present, check Orange/Black wire for an open circuit. If wire is okay, Powertrain Control Module (PCM) and Body Control Module (BCM) diagnosis is necessary.
4. Measure voltage between terminal "T" (Tan wire) and ground. If 5 volts are present, go to next step. If 5 volts are not present, check Tan wire for an open circuit. If wire is okay, BCM/PCM diagnosis is necessary.
5. Measure voltage between terminals "L" (Brown wire) and "M" (Black/White wire). If battery voltage is present, go to next step. If battery voltage is not present, check Black/White wire for an open circuit. Ensure grounds are clean and tight.
6. Measure voltage between terminals "L" (Brown wire) and "S" (Black/White wire). If battery voltage is present and ECC display is normal, replace fuel data center. If battery voltage is not present, check Black/White wire for an open circuit.
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Sunday, October 24th, 2010 AT 1:43 AM