Customer Problem Analysis Check: Pre-Check

Diagnosis System
1. Check the indicator.
  NOTE:
  If the indicator check result is not normal, proceed to troubleshooting for the combination meter. See TROUBLESHOOTING .
  1. Turn the ignition switch to 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.
    
    Fig 1: Locating Cruise Control Indicator Lamp
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Check the DTC.
  NOTE: If a malfunction occurs in the No. 1 vehicle speed sensors 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 diagnostic trouble code.
  
  Fig 2: Reading Flashes Of Cruise Indicator Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Output of DTC using diagnosis check wire.
  1. Turn the ignition switch ON.
  2. Using SST, connect terminals Tc and E1 of DLC1.
    SST 09843-18020
  3. Read the DTC on the CRUISE MAIN indicator light.
    NOTE:
    If the DTC is not output, inspect the diagnosis circuit. See DIAGNOSIS CIRCUIT .
    
    As an example, the blinking patterns for codes; normal, 11 and 21 are shown in Fig 3.
    
    Fig 3: Reading DTCs Output By Flashes Of Cruise Indicator Light
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    Fig 4: Connecting Terminals Tc & E1 Of DLC1
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
DTC Clearance (Erase Mode)
NOTE: Under the erase mode, diag detection does not work.
1. Drive at about 15 km/h or below.
2. Using SST, connect terminals Tc and E1 of DLC1.
  SST 09843-18020
  
  Fig 5: Using DLC1 & Cruise Switch To Clear DTCs
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Pull the cruise control switch to CANCEL.
4. On the above mentioned condition, turn on the cruise control main switch 5 times within 3 seconds.
Problem Symptom Confirmation (Road Test)
1. Inspect the SET switch.
  1. Push the main switch ON.
    
    Fig 6: Using Cruise Switch To Select SET Function
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Drive at a desired speed (40 km/h (25 mph) or higher).
  3. Pull the control switch to the SET/COAST.
  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.
  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.
    
    Fig 7: Using Cruise Control Switch To Select RES/ACC Function
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Momentarily pull the control switch upward to 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.
  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.
  4. Momentarily pull the control switch downward to SET/COAST, and then immediately release it. Check that the vehicle speed decreases by about 1.5 km/h (Tap-down function).
    
    Fig 8: Using Cruise Control Switch To Select SET/COAST Function
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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 following, check that the cruise control system is cancelled and that the normal driving mode is reset.
    - Depress the brake pedal
    - Depress the clutch pedal (M/T)
    - Shift to except D position (A/T)
    - Push the main switch OFF
    - Pull the cruise control switch to CANCEL
      
      Fig 9: Using Cruise Control Switch To Select CANCEL Function
      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
5. Inspect the RESUME 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 following, check that the cruise control system is cancelled and that the normal driving mode is reset.
    - Depress the brake pedal
    - Depress the clutch pedal (M/T)
    - Shift to except D position (A/T)
    - Push the main switch OFF
    - 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 10: Pushing Cruise Control Switch Up To Select RES/ACC
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Input Signal Check
NOTE:
1. For check No. 1 - 3
  - Turn ignition switch ON.
2. For check No. 4
  - Jack up the vehicle.
  - Start the engine.
  - Shift to D position.
1. Pull the control switch to SET/COAST or RES/ACC position and hold it down or hold it up "(1)".
  
  Fig 11: Identifying Switch Functions For Footnotes 1, 2 & 3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Push the main switch ON "(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 Fig 12.
6. Read the blinking pattern of the CRUISE MAIN indicator light.
7. After performing the check, turn the main switch OFF.
  NOTE: When 2 or more signals are input to the ECU, the lowest numbered code will be displayed first.
  
  Fig 12: Input Signal Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002