DTC P1500 - Engine Start Signal Circuit Malfunction

Using a voltmeter, measure voltage (backprobe) between ground and PCM harness connector "B", terminal No. 16 while cranking engine. Reading should be 6-10 volts. After engine starts, voltage should drop to zero. If reading is as specified, check for poor connection at PCM. Repair as necessary. If connections are okay, replace PCM. If reading is not as specified, Repair open Black/Yellow wire between starter and PCM. Retest system.