Telescopic Sensor Circuit
- Connect Lexus Hand-Held Tester (scan tool) to Data Link Connector 3 (DLC3). Turn ignition and tester on. Select ACTIVE TEST mode on tester. Using tester, telescope steering wheel in and out. Read TELSC POS voltage on tester. If scan tool is not available, remove tilt and telescopic ECU with harness connector connected. Measure voltage between 22-pin ECU connector (T9), terminal No. 6 (Yellow/Red wire) and 12-pin ECU connector (T8), terminal No. 2 (Brown/White wire). See Figure. Voltage should be less than 2.5 volts with wheel in (contracted) and 3.5-5.5 volts with wheel out (extended). If voltage is not as specified, go to next step. If voltage is as specified, go to TROUBLE SHOOTING and identify next circuit to be checked.
- Disconnect 6-pin telescopic motor/sensor connector. See Fig 1. Check resistance between motor/sensor terminals No. 1 and No. 2 . Resistance should be 3500-6500 ohms. Check resistance between motor/sensor terminal No. 1 and No. 4. Resistance should be less than 2000 ohms in contracted range and 3500-6500 ohms in extended range. If resistance is not as specified, replace motor/sensor. If resistance is as specified, check wiring harness between telescopic motor/sensor and tilt and telescopic ECU. See WIRING DIAGRAMS. Repair as necessary. If wiring is okay, go to TROUBLE SHOOTING and identify next circuit to be checked.
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