Cruise Control Systems: Pre-Check

1. Hook up the break-out-box and hand-held tester to the vehicle.
2. Read the ECU input/output values by following the prompts on the tester screen.
3. Please refer to the hand-held tester has a "Snapshot" function. This records the measured data and is effective in the diagnosis of intermittent problems.

Fig 1: Connecting Break-Out-Box And Hand-Held Tester To Vehicle

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Hook up the hand-held tester to the DLC3.
2. Monitor the ECU data by following the prompts on the tester screen.

DTC can be deleted using a hand-held tester. If there is no hand-held tester or it cannot be used, disconnect the auxiliary battery for 1 min. or more and connect it again.

Fig 2: Connecting Hand-Held Tester To DLC3

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Inspect the SET switch.
   1. Push the main switch ON.
   2. Drive at a desired speed (40 km/h (25 mph) or higher).
   3. Press the control switch to the SET/COAST.
   4. After releasing the switch, check that the vehicle cruises at the desired speed.
   Fig 3: Inspecting SET Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Inspect the ACCEL switch.
   1. Push the main switch ON.
   2. Drive at a desired speed (40 km/h (25 mph) or higher).
   3. 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.
   4. Momentarily press the control switch upward in the RES/ACC and then immediately release it. Check that the vehicle speed increases by about 1.5 km/h (Tap-up function).
   Fig 4: Inspecting ACCEL Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Inspect the COAST switch.
   1. Push the main switch ON.
   2. Drive at a desired speed (40 km/h (25 mph) or higher).
   3. Check that the vehicle speed decreases while the control switch is turned to SET/COAST, and the vehicle cruises at the set speed when the switch is released.
      Fig 5: Inspecting COAST Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   4. Momentarily press the control switch is turned to SET/COAST, and then immediately release it. Check that the vehicle speed decreases by about 1.5 km/h (Tap-down function).
4. Inspect the CANCEL switch.
   1. Push the main switch ON.
   2. Drive at a desired speed (40 km/h (25 mph) or higher).
   3. When operating one of the followings, check that the cruise control system is cancelled 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
        Fig 6: Inspecting CANCEL Switch

        Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Inspect the RESUME switch.
   Fig 7: Inspecting RESUME Switch

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
   1. Push the main switch ON.
   2. Drive at a desired speed (40 km/h (25 mph) or higher).
   3. When operating one of the followings, check that the cruise control system is cancelled 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
   4. After the control switch is turned to RES/ACC at the driving speed of more than 40 km/h (25 mph), check that the vehicle restores the speed prior to the cancellation.
      Fig 8: Checking Control Switch

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
6. Input Signal Check 

   (Using hand-held tester) 

   1. Connect the hand-held tester to DLC3
   2. Check the control switch (MAIN, CANCEL, SET/COAST, RES/ACC)