Fuel Level Input Test
- Disconnect fuel tank unit connector. Turn ignition switch to RUN position. Using a voltmeter, ensure battery voltage is present between terminal "C" (Pink/Black wire) and terminals "E" (Black/White wire), "F" (Purple wire), and ground. If battery voltage is present, go to next step. If battery voltage is not present, check Pink/Black and Black/White wires for an open. Check Purple wire for an open or short circuit to battery. If Purple wire is okay, replace BCM.
- Enter BCM diagnosis input BD40. Refer to, in this article, BCM DIAGNOSIS PROCEDURE . Disconnect fuel tank sender connector. Using a fused jumper wire, bridge terminals "C" (Pink/Black wire) and "F" (Purple wire), and bridge terminals "E" (Black/White wire) and "F" (Purple wire). If BCM displays approximately 25, then 0, replace fuel gauge sender. If BCM display is not as specified, check Purple wire for a short circuit to ground. If wire is okay, replace BCM.