KS1 - Signal From PCM

- Key OFF.

- Install Breakout Box (connect PCM).

- Key ON.

- Measure the voltage between BOB test Pin KS and ground using a digital voltmeter.

- Is the voltage approximately 2.4 volts?

Yes -- Go to KS2. KS2 - Check KS Wire For Open

No -- Go to EEC Pinpoint Test VPWR. VPWR - Vehicle Power

If VPWR is OK, Replace the PCM.