TG100 - Check For Short to Ground In Sensor Harness SIG Circuit

- Key "OFF".

- Transmission Range (TR) sensor disconnected.

- Breakout box installed, Powertrain Control Module (PCM) disconnected.

- Measure resistance between test pins 30 at the breakout box and chassis ground.

- Is resistance greater than 10,000 ohms?

Yes -- Go to TG103. TG103 - Check Sensor Resistance

No -- Service short circuit. Remove breakout box. Reconnect all components. Rerun quick test. Quick Test Appendix (Detailed Testing Instructions)