LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Toyota >> 2002 >> 4Runner Base >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Pre-Check
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Cruise Control Systems: Pre-Check

  1. Diagnosis system  :
      NOTE: If the indicator check result is not normal, proceed to troubleshooting. See TROUBLESHOOTING for the combination meter section.
      Fig 1: Locating Instrument Panel Cruise Control Indicator Lamp
      G01051560Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    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.
    2. Check the DTC.
      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 diagnostic trouble code.
      Fig 2: Checking Indicator Light DTC
      G01051561Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Using diagnosis check wire, check the output of DTC.
      1. Turn the ignition switch ON.
      2. Using SST, connect terminals Tc and E1 of DLC1.
        1. SST 09843-18020
          Fig 3: Identifying DLC1 Terminals TC & E1
          G01051562Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      3. Read the DTC on the CRUISE MAIN indicator light.
        NOTE: If the DTC is not output, inspect the diagnosis circuit. As an example, the blinking patterns for codes; normal 11 and 21 are shown.
        Fig 4: Reading DTCs Output By Flashes Of Cruise Indicator Light
        G01051563Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. ECU terminal values measurement by using Toyota break-out-box and Toyota hand-held tester 
    1. Hook up the TOYOTA break-out-box and TOYOTA hand-held tester to the vehicle.
    2. Read the ECU input/output values by following the prompts on the tester screen.
      NOTE: TOYOTA hand-held tester has a "Snapshot" function. This records the measured values and is effective in the diagnosis of intermittent problems. Please refer to the TOYOTA hand-held tester/TOYOTA break-out-box operator's manual for further details.
      Fig 5: Identifying Toyota Hand Held Tester & Break Out Box
      G01051564Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. NOTE: Under the erase mode, diagnostic detection does not work.

    Components called out in steps are identified in the graphic, see Fig 6.

  3. DTC Clearance (erase mode): 
    1. Drive at about 15 km/h or below.
    2. Using SST, connect terminals Tc and E1 of DLC1.
      1. SST 09843-18020
    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.
      Fig 6: Using Cruise Control Switch To Activate ERASE Mode
      G01051565Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Problem symptom confirmation (road test): 
    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 7: Identifying Cruise Control Set/Coast & On/Off Button (Main Switch)
      G01051566Courtesy 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. Press the control switch to the SET/COAST.
      4. 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.
      5. Momentarily press the control switch upward to RES/ACC and then immediately release it. Check that the vehicle speed increases by about 1.6 km/h (1 mph) (Tap-up function).
      Fig 8: Identifying RES/ACC Setting
      G01051567Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    3. Inspect the COAST.
      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. 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.
      5. Momentarily press the control switch downward to SET/COAST, and then immediately release it. Check that the vehicle speed decreases by about 1.6 km/h (1 mph) (Tap-down function).
      Fig 9: Identifying SET/COAST Setting
      G01051568Courtesy 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. Press the control switch to the SET/COAST.
      4. 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)
        • Turn the main switch OFF
        • Pull the cruise control switch to CANCEL
        Fig 10: Identifying CANCEL Switch
        G01051569Courtesy 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. Press the control switch to the SET/COAST.
      4. 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)
        • Pull the cruise control switch to CANCEL
      5. 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 11: Identifying RES/ACC Setting
        G01051570Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      6. NOTE: The following guidelines are related to test steps in Fig 13.
      1. For check No.1 - 2:
        • Turn the ignition switch ON.
      2. For check No.3:
        • Turn ignition switch ON.
        • Shift to D position.
      3. For check No.4:
        • Jack up the vehicle.
        • Start the engine.
        • Shift to D position.
    6. Input signal check  :
      1. Press the control switch to SET/COAST or RES/ACC position and hold it down or hold it up respectively (1)
        Fig 12: Identifying Control Switch Test Modes
        G01051571Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
      2. Push the main switch ON (2 times).
      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. NOTE: When 2 or more signals are input to the ECU, the lowest numbered code will be displayed first.
      6. Read the blinking pattern of the CRUISE MAIN indicator light.
      7. After performing the check, turn the main switch OFF.
        Fig 13: Identifying Main Switch Test Parameters
        G01051572Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
scientia non olet · About LEMON Manuals