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Home >> Lexus Truck >> 2005 >> LX 470 V8-4.7L (2UZ-FE) >> Repair and Diagnosis >> Brakes and Traction Control >> Antilock Brakes / Traction Control Systems >> Testing and Inspection >> Component Tests and General Diagnostics >> Component Tests >> Speed Sensor Signal Check (Test Mode) >> Without Scan Tool

Without Scan Tool

SPEED SENSOR SIGNAL CHECK (TEST MODE)

HINT:
- When replacing the yaw rate sensor or ECU, make sure to perform yaw rate sensor zero point calibration.
- If the ignition switch is turned from ON to ACC or LOCK during test mode, DTC will be erased.

a. In case of not using hand-held tester:
Check the speed sensor signal.




1. Turn the ignition switch OFF.
2. Using SST, connect terminals TS and E1 of DLC1.

SST 09843-18020

3. Start the engine.




4. Check that the ABS warning light blinks.

HINT: If the ABS warning light does not blink, inspect the ABS warning light circuit and TS circuit

5. Keep the vehicle in the stationary condition on the flat place for 6 sec. or more.
6. Shift the transfer lever in L4 position and turn the center diff. lock switch ON.
7. Shift the transfer lever back.
8. Leaving the vehicle in the stationary condition and the brake pedal in free condition for 1 sec. or more, continue to depress the brake pedal with 98 N (10 kgf, 22 lbf) of force or more for 1 sec. or more.
9. Leaving the vehicle in the stationary condition, depress the brake pedal with 980 N (100 kgf, 221 lbf) of force or more quickly.

HINT: At this time, the ABS warning light comes on for 3 sec.

10. Drive vehicle straight forward. When driving the vehicle with the speed faster than 45 km/h (28 mph) for several seconds, check that the ABS warning light comes off.

HINT: There is a case that the sensor check is not completed if the vehicle has its wheels spin or its steering wheel steered during this check.

11. Stop the vehicle.
12. Using SST, connect terminals Tc and E1 of DLC1 or Tc and CG of DLC3.

SST 09843-18020 or 09843-18040

13. Read the number of blinks of the ABS warning light.

HINT:
- See the list of DTC.
- If every sensor is normal, a normal code is output (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).
- If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed 1st.




14. After doing the check, disconnect the SST from terminals of DLC1 or terminals of DLC1 and DLC3, and turn ignition switch OFF.

SST 09843-18020 or 09843-18040
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