DTC P1500: Engine Starter Signal Circuit Malfunction

Remove PCM cover. Using DVOM, measure voltage between ground and (backprobe) PCM harness connector terminal C51-3-18. If voltage is 6-12 volts while cranking and 0-1 volt after starting engine, check for poor PCM harness connections or intermittent problem. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If connections are okay and no intermittent problems were found, replace PCM and retest system. If voltage is not a specified, repair open in Black/Yellow wire between starter and PCM.