A12 - Check PIP Signal Circuit For Shorts To Ground

*** THIS ARTICLE REFLECTS CHANGES MADE BY TSB # 945B16, March 1994

- Key Off.

- Breakout box installed, PCM disconnected.

- ICM disconnected.

- Measure resistance between Test Pin 49 (PIP) and Test Pins 23, 51, 91 and 103 (short to GROUND).

- Is each resistance greater than 10,000 ohms?

YES -- Go to A13. A13 - Check PIP Signal

NO -- SERVICE short circuit. REMOVE breakout box. RECONNECT all components. Rerun quick test. Diagnostic Subroutines (DSR) - Extracting Codes

If vehicle does not start, go to A13. A13 - Check PIP Signal