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Home >> Lexus >> 2004 >> IS 300 Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 120 (Cruise Control System) >> Self-Diagnostic System >> Confirmation Test
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Confirmation Test

WARNING: This page is about a different car, the 2002 Lexus IS 300. However, it is still accessible from the selected car via links, so may be relevant.
  1. Inspect SET Switch -  Push the main switch ON. See Fig 1. Drive at a desired speed (25 mph (40 km/h) or higher). Press the control switch to the SET/COAST . After releasing the switch, check that the vehicle cruises at the desired speed.
  2. Inspect ACCEL Switch -  Push the main switch ON. Drive at a desired speed (25 mph (40 km/h) or higher). Check that the vehicle speed increases while the control switch is turned to RES/ACC, and that the vehicle cruises at the set speed when the switch is released. Momentarily press the control switch upward in the RES/ACC and then immediately release it. Check that the vehicle speed increases by about 0.93 mph (1.5 km/h), tap-up function.
  3. Inspect COAST Switch -  Push the main switch ON. Drive at a desired speed (25 mph (40 km/h) or higher). Check that the vehicle speed decreases while the control switch is turned to SET/COAST, and that the vehicle cruises at the set speed when the switch is released. Momentarily press the control switch upward in the SET/COAST and then immediately release it. Check that the vehicle speed increases by about 0.93 mph (1.5 km/h), tap-down function.
  4. Inspect CANCEL Switch -  Push the main switch ON. Driver at a desired speed (25 mph (40 km/h) or higher). When operating one of the following, check that the cruise control system is canceled and that the normal driving mode is reset.
    • Depress the brake pedal.
    • Shift to except D range (A/T).
    • Push the main switch OFF.
    • Pull the cruise control switch to CANCEL.
  5. Inspect RESUME Switch -  Push the main switch ON. Driver at a desired speed (25 mph (40 km/h) or higher). When operating one of the following, check that the cruise control system is canceled and that the normal driving mode is reset.
    • Depress the brake pedal.
    • Shift to except D range (A/T).
    • Pull the cruise control switch to CANCEL.
    After the control switch is turned to RES/ACC at the driving speed of more than 25 mph (40 km/h), check that the vehicle restores the speed prior to the cancellation.
Fig 1: Identifying Cruise Control Switch
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