JC33 - Check For Coil PWR to Left Coil

WARNING: NEVER CONNECT PCM TO THE EEC BREAKOUT BOX WHEN PERFORMING EI DIAGNOSTICS.

- Key Off.

- Install EI (High Data Rate) diagnostic harness to breakout box.

- Install the left coil tee. The tee is yellow (left coil).

- Connect EI diagnostic harness negative lead to battery.

- Use 4.6L EI (High Data Rate) 8 overlay.

- Set EI harness type switch to "8 cylinder" position.

- DVOM on 40 volt DC scale.

- Key On, Engine Off.

- When making voltage checks, a ground reading means any value within a range of zero to 1 volt. Also VPWR or COIL PWR readings mean any value that falls within a range of B+ to 2 volts less than B+.

- Measure voltage between (+)J11 (COIL PWR L) and (-)J7 (B-) at breakout box.

- Is DC voltage greater than 10.0 volts?

YES -- GO to JC34. JC34 - Check For C3 High at Coil Pack - KOEO

NO -- CHECK connectors, SERVICE or REPLACE harness. COIL PWR is open to left coil. REMOVE all test equipment. RECONNECT all components. Clear continuous memory. Clearing Diagnostic Trouble Codes

Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes