1. Measure the voltage between PCM connector terminals C18 and A8 or A9.

Is there about 5 V?

YES | - | Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If the symptom/indication goes away with a known-good PCM, replace the original PCM .■
NO | - | Go to Step 45 .

1. Turn the ignition switch OFF.

1. Jump the SCS line with the HDS.

1. Disconnect PCM connector C (22P).