DP2 - Check VSS Harness Circuits For Shorts

*** THIS ARTICLE REFLECTS CHANGES MADE BY TSB # 94-24B-17, December 1994

- Key Off.

- VSS disconnected.

- Breakout box installed, PCM disconnected.

- Measure resistance between Test Pin 58 [VSS(+)] and Test Pins 51, 103 (PWR GND). 33 [VSS(-)], 91 (SIG RTN) and 71 (VPWR) at the breakout box.

- Measure resistance between Test Pin 33 [VSS(-)] and 71 (VPWR) at the breakout box.

- Is each resistance greater than 500 ohms?

YES -- Go to DP3. DP3 - Check VSS Resistance

NO -- SERVICE short circuit. REMOVE the breakout box. RECONNECT all components. COMPLETE PCM reset to clear DTCs. RUN VSS Drive Cycle in DP20 to verify the repair. DP20 - VSS Drive Cycle Test