Anti-Lock Brake System - Diagnostics: Pre-Check

1. Check the warning lights.
   1. Release the parking brake pedal.
   2. When the ignition switch is turned ON, check that the ABS warning light and BRAKE warning light go on for approx. 3 seconds.
   NOTE:

   • When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light is lit.
   • If the warning light check result is not normal, proceed to troubleshooting for the ABS warning light circuit and BRAKE warning light circuit.
   DIAGNOSIS SYSTEM REFERENCE
   
   

   Trouble Area	Go To
   ABS Warning Light Circuit	ABS WARNING LIGHT CIRCUIT
   BRAKE Warning Light Circuit	BRAKE WARNING LIGHT CIRCUIT

   Fig 1: View Of Speedometer With & Without Tachometer (USA & Canada Model)

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2. In case of not using hand-held tester:

   Check the DTC of skid control ECU.

   Fig 2: Identifying DLC1 & DLC3 Terminals

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   1. Using SST, connect terminals Tc and E₁ of the DLC1 or Tc and CG of the DLC3.

      SST 09843-18020 or 09843-18040

   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, ABS warning light circuit or BRAKE warning light circuit.
        DIAGNOSIS SYSTEM REFERENCE
        
        

        Trouble Area	Go To
        Tc terminal circuit	Tc TERMINAL CIRCUIT
        ABS warning light circuit	ABS WARNING LIGHT CIRCUIT
        BRAKE warning light circuit	BRAKE WARNING LIGHT CIRCUIT

      • When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light is lit.
      • As an example, the blinking patterns for normal code and codes 11 and 21 are shown on the left.
        Fig 3: Malfunctions Blinking Pattern (Normal Code)

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   4. Codes are explained in the code table on DIAGNOSTIC TROUBLE CODE CHART .
   5. After completing the check, disconnect terminals Tc and E₁ of the DLC1 or 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 1st.

3. In case of using hand-held tester:

   Check the DTC.

   1. Hook up the hand-held tester to the DLC3.
      Fig 4: Connecting DLC3 To Hand Held Tester

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   2. Turn the ignition switch ON.
   3. Read the DTC by following the prompts on the tester screen.
   NOTE: Please refer to the hand-held tester operator's manual for further details.
4. In case of not using hand-held tester: Clear the DTC of skid control ECU.
   1. Using SST, connect terminals Tc and E₁ of the DLC1 or Tc and CG of the DLC3.

      SST 09843-18020 or 09843-18040

   2. Turn the ignition switch ON.
   3. Clear the DTC stored in ECU by depressing the brake pedal 8 or more times within 5 seconds.
      Fig 5: Adjusting Brake Pedal Movement

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   4. Check that the warning light shows the normal code.
   5. Remove the SST from the terminals of the DLC1 or DLC3.

      SST 09843-18020 or 09843-18040

   NOTE: Cancellation cannot be done by removing the battery cable or ECU-IG fuse.
5. In case of using hand-held tester

   Clear the DTC.

   1. Hook up the hand-held tester to the DLC3.
      Fig 6: Connecting DLC3 To Hand Held Tester

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   2. Turn the ignition switch ON.
   3. Operate the hand-held tester to erase the codes.
   NOTE: Please refer to the hand-held tester operator's manual for further details.

1. In case of not using hand-held tester:

   Check the sensor signal.

   1. Turn the ignition switch OFF.
   2. Using SST, connect terminals Ts and E₁ of the DLC1.

      SST 09843-18020

      Fig 7: Identifying DLC1 Connector Terminals

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   3. Start the engine.
   4. Check that the ABS warning light blinks.
      Fig 8: ABS Warning Light Blinking Pattern

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      NOTE: If the ABS warning light does not blink, inspect the (See ABS WARNING LIGHT CIRCUIT ).
   5. Drive vehicle straight forward.

      Drive vehicle at a speed faster than 45 km/h (28 mph) for several seconds and check that the ABS warning light comes off.

      NOTE: The sensor check may not be completed if the front wheels are spun or the steering wheel is steered during this check.
   6. Stop the vehicle.
   7. Using SST, connect terminals Tc and E₁ of the DLC1 or Tc and CG of the DLC3.

      SST 09843-18020 or 09843-18040

   8. Turn the ignition switch ON.
   9. Read the number of blinks of the ABS warning light.
      NOTE:

      • See the list of DTC shown on the next page.
      • If every 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 malfunction codes are identified at the same time, the lowest numbered code will be displayed 1st.
      Fig 9: Malfunctions Code Blinking Pattern

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   10. After doing the check, disconnect the SST from terminals of the DLC1 or DLC3, and turn the ignition switch OFF.

       SST 09843-18020 or 09843-18040

2. In case of using hand-held tester:

   Check the sensor signal.

   1. Hook up the hand-held tester to the DLC3.
      Fig 10: Connecting DLC3 To Hand Held Tester

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   2. Do step (3) - (6) on the previous page.
   3. Read the DTC by following the prompts on the tester screen.
   NOTE: Please refer to the hand-held tester operator's manual for further details.

DTC of speed sensor check function: 

Fig 11: Speed Sensor DTC Functioning Chart

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