Trouble Shooting: Pre-Check

1. Check that the cruise control actuator assy, acceleration wire, accelerator auto drive cable assy, link assy is installed correctly and that the wire and link are securely connected.
2. Check that the operating movement of the acceleration pedal, cruise control actuator assy, acceleration wire, accelerator auto drive cable assy, link is smooth.
3. Adjust the acceleration auto drive cable assy and link system not to allow any play or excessive tension.
4. Check that the cruise control computer assy, cruise control actuator assy, cruise control main switch assy and connectors of each cancel switch are connected securely.
5. When turning on the main switch of the cruise control main switch assy with the ignition switch ON, check that the CRUISE indicator lamp in the accessory meter assy lights up.

NOTE: If a malfunction occurs in the No. 1 vehicle speed sensor or actuator, etc. during cruise control driving, the ECU actuates AUTO CANCEL of the cruise control and turns on and off the CRUISE MAIN indicator light to inform the driver of a malfunction. At the same time, the malfunction is stored in memory as a DTC.
1. Check the indicator
   1. Turn the ignition switch ON.
   2. Check that the CRUISE main indicator light comes ON when the cruise control main switch is turned ON, and that the indicator light goes off when the main switch is turned OFF. See Figure.
NOTE: If a malfuction etc.
2. Check the DTC, See Fig 3.
3. Output a DTC using diagnosis check wire:
   1. Turn the ignition switch ON.
   2. Using SST, connect terminals Tc and CG of the DLC3. See Fig 4. SST 09843-18020
   3. Read the DTC on the CRUISE MAIN indicator light. See Figure. If The DTC is not output, inspect the diagnosis circuit. See DIAGNOSTICS - CRUISE CONTROL SYSTEM . As an example, the blinking patterns for codes; normal, 11 and 21 are shown in the illustration. See Figure.

1. Hook up the break-out-box and TOYOTA hand-held tester to the vehicle. See Fig 5.
2. Read the ECU input/output values by following the prompts on the tester screen.
3. Please refer to the TOYOTA hand-held tester has a "Snapshot" function. This records the measured data and is effective in the diagnosis of intermittent problems.

Please refer to the TOYOTA hand-held tester operator's manual for further details.

1. Connect the TOYOTA hand-held tester to the DLC3. See Fig 5.
2. Monitor the ECU data by following the prompts on the tester screen.

1. Drive at about 15 km/h or below.
2. Using SST, connect terminals Tc and CG of DLC3. See Fig 4. SST 09843-18020
3. Pull the cruise control switch to CANCEL. See Figure.
4. On the above mentioned condition, turn on the cruise control main switch 5, times within 3 seconds.

1. Inspect the SET switch, see Figure
   1. Push the main switch ON. See Figure.
   2. Drive at a desired speed (25 mph (40 km/h). or higher).
   3. Press the control switch to the SET/COAST. See Figure.
   4. After releasing the switch, check that the vehicle cruises at the desired speed.
2. Inspect the ACCEL switch
   1. Push the main switch ON. See Figure.
   2. Drive at a desired speed (25 mph (40 km/h). 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. See Figure.
   4. Momentarily press the control switch upward for RES/ACC and then immediately release it. Check that the vehicle speed increases by about 1.5 Km/h (Tap-up function).
3. Inspect the COAST switch:
   1. Push the main switch ON. See Figure.
   2. Drive at a desired speed 25 mph (40 km/h) 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. See Figure
   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. See Figure.
   2. Drive at a desired speed 25 mph (40 km/h) 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 position.
      • Push the main switch OFF.
      • Pull the cruise control switch to CANCEL. See Figure.
5. Inspect the RESUME switch:
   1. Push the main switch ON. See Figure.
   2. Drive at a desired speed 25 mph (40 km/h) or higher.
   3. When operating one of the following operations, check that the cruise control system is cancelled and that the normal driving mode is reset:
      • Depress the brake pedal.
      • Shift to except "D" position (A/T).
      • Pull the cruise control switch to CANCEL. See Figure.
   4. 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.

See Fig 6.

• For check No. 1- 3, Turn ignition switch ON.
• For check No.4 Jack up the vehicle, Start the engine, Shift to D position.

1. Press the control switch to SET/COAST or RES/ACC position and hold it down or hold it up "1".
2. Push the main switch ON as "2".
3. Check that the CRUISE MAIN indicator light blinks twice or 3 times repeatedly after 3 seconds.
4. Turn the SET/COAST or RES/ACC switch OFF.
5. Operate each switch as listed in the table below.
6. Read the blinking pattern of the CRUISE MAIN indicator light.
7. After performing the check, turn the main switch OFF.