Section 368 (Anti-Lock Brake System - Diagnostics): Pre-Check

WARNING: This page is about a different car, the 2004 Toyota MR2. However, it is still accessible from the selected car via links, so may be relevant.

Diagnosis System
1. Check the ABS warning light.
  
  Fig 1: Locating ABS Warning Light
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  When the ignition switch is turned ON, check that the ABS warning light comes on for approx. 3 seconds.
  
  NOTE: If the warning light is abnormal, proceed to troubleshooting for the ABS warning light circuit (See ABS Warning Light Circuit ).
2. When not using the hand-held tester:
  Check the DTC.
  1. Using SST, connect terminals Tc and CG of the DLC3.
    SST 09843-18040
    
    Fig 2: Connecting Terminals Tc & CG Of DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch ON.
  3. Read the DTC from the ABS warning light on the combination meter.
    NOTE:
    If no code appears, inspect the diagnostic circuit or ABS warning light circuit (SeeTC TERMINAL CIRCUIT ).
    
    As an example, the blinking patterns for normal code and codes 11 and 21 are shown.
    
    Fig 3: Blinking Patterns For Normal Code & Codes 11 & 21
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Codes are explained in the code table on DIAGNOSTIC TROUBLE CODE CHART .
  5. After completing the check, disconnect terminals Tc and CG of the DLC3, and turn off the display.
  If 2 or more malfunctions are indicated at the same time, the lowest numbered DTC will be displayed first.
3. When the using hand-held tester: Check the DTC.
  1. Hook up the hand-held tester to the DLC3.
    
    Fig 4: Connecting Hand Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch ON.
  3. Read the DTC by following the prompts on the tester screen.
    Please refer to the hand-held tester operator's manual for further details.
4. When not using the hand-held tester:
  Clear the DTC.
  1. Using SST, connect terminals Tc and CG of the DLC3.
    SST 09843-18040
    
    Fig 5: Connecting Terminals Tc & CG of DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Turn the ignition switch ON.
  3. Clear the DTC stored in the ECU by depressing the brake pedal 8 or more times within 5 seconds.
    
    Fig 6: Clearing DTC Stored In ECU
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. Check that the warning light shows the normal code.
  5. Remove the SST from the terminals of the DLC3.
  SST 09843-18040
5. When using the hand-held tester:
  
  Fig 7: Hooking Up Hand-Held Tester To DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Clear the DTC.
  1. Hook up the hand-held tester to the DLC3.
  2. Turn the ignition switch ON.
  3. Operate the hand-held tester to erase the codes.
    (See the hand-held tester operators manual.)
Speed Sensor Signal (Test Mode)
1. When not using the hand-held tester:
  Check the speed sensor signal.
  1. Turn the ignition switch OFF.
  2. Using SST, connect terminals Ts and CG of the DLC3.
    
    Fig 8: Connecting Terminals Ts & CG Of DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    
    SST 09843-18040
  3. Start the engine.
  4. Check that the ABS warning light blinks.
    NOTE: If the ABS warning light does not blink, inspect the ABS warning light circuit (See ABS WARNING LIGHT CIRCUIT ).
  5. Drive the vehicle straight forward.
    NOTE: Drive the vehicle at faster than 45 km/h (28 mph) for several seconds.
  6. Stop the vehicle.
  7. Using SST, connect terminals Tc and CG of the DLC3.
    SST 09843-18040
  8. Read the number of blinks of the ABS warning light.
    NOTE:
    - See the list of DTC shown in Fig 11
    
    - If each sensor is normal, a normal code is output (A cycle of 0.25 sec. ON and 0.25 sec. OFF is repeated).
    
    - If 2 or more malfunctions are indicated at the same time, the lowest numbered code will be displayed first.
    
    Fig 9: Blinking Patterns For Normal Code & Malfunction Code
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. After doing the check, disconnect the SST from terminals Ts, Tc and CG of the DLC3, and turn ignition switch OFF.
  SST 09843-18040
2. When Using the hand-held tester:
  Check the DTC.
  1. Hook up the hand-held tester to the DLC3.
    
    Fig 10: Hooking Up Hand-Held Tester To DLC3
    Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. Perform steps ( 3) to ( 6).
  3. Read the DTC by following the prompts on the tester screen.
    Please refer to the hand-held tester operator's manual for further details.
  DTC Of Speed Sensor Check Function:
  
  Fig 11: Speed Sensor Checking DTC Table
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002