Anti-Lock Brake System - Diagnostics: Pre-Check

Fig 1: Locating ABS Warning Light

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When the ignition switch is turned ON, check that the ABS warning light comes on for approx. 3 seconds.

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

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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

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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 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.

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

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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.

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

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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

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

SST 09843-18040

Fig 7: Hooking Up Hand-Held Tester To DLC3

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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.)

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

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   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

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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

Check the DTC.

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

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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

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