Anti-Lock Brake System With EBD: Pre-Check

Fig 1: Locating ABS, Brake Indicator

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When the ignition switch is turned ON, check that the ABS warning light and BRAKE warning light goes on for approximately 3 seconds.

Check the DTC.

1. Using SST, connect terminals Tc and CG of the DLC3.
   Fig 2: Locating SST For Connecting Of TC And CG Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   SST 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 or ABS warning light circuit (See Tc TERMINAL CIRCUIT  or ABS WARNING LIGHT CIRCUIT ).
   • As an example, the blinking patterns of normal code and codes 11 and 21 are shown in the left.
     Fig 3: Locating Blinking Patterns Of Normal Code And Codes 11 And 21

     Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Codes are detailed in the code table on DIAGNOSTIC TROUBLE CODE CHART .
5. After completing the check, disconnect terminals Tc and CG from the DLC3, and turn the display off.

If 2 or more malfunctions are indicated at the same time, the lowest numbered DTC will be displayed first.

Check the DTC.

1. Connect the TOYOTA hand-held tester to the DLC3.
   Fig 4: Connecting TOYOTA 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 TOYOTA hand-held tester operator's manual for further details.

Clear the DTC.

1. Using SST, connect terminals Tc and CG of the DLC3.
   Fig 5: Locating SST For Connecting Of Tc And CG Terminal

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   SST 09843-18040

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

   SST 09843-18040

   Fig 6: Depressing Brake Pedal For Clearing DTC Stored In ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Clear the DTC.

1. Connect the TOYOTA hand-held tester to the DLC3.
   Fig 7: Connecting TOYOTA Hand-Held Tester To DLC3 For Clearing DTC

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the ignition switch ON.
3. Operate the TOYOTA hand-held tester to erase the codes (See TOYOTA hand-held tester operator's manual).

1. The vehicle (sensor) status at the occurrence of abnormality of the diagnosis code and during the ABS operating can be memorized and displayed using the TOYOTA hand-held tester.
2. Only one record of freeze frame data is stored, however, freeze frame data during the ABS operating is always up-dated. After the storage of freeze frame data, up to 31 ignition "ON" operations are stored and displayed.
   NOTE: If the ignition switch "ON" operation exceeds 31 times, "31" appears on the display.
3. If the diagnosis code abnormality occurs, the freeze frame data at the occurrence of the abnormality is stored but the ABS actuation data is deleted.

Check the speed sensor signal.

1. Turn the ignition switch OFF.
2. Using SST, connect terminals Ts and CG of the DLC3.
   Fig 8: Locating SST For Connecting Terminals Ts And 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 more 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 DTC list shown on the next page.
   • If each sensor is normal, the 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.
9. After doing the check, disconnect the SST from terminals Ts, Tc and CG of the DLC3, and turn the ignition switch OFF.
   Fig 9: ABS Warning Light Blinking Pattern

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   SST 09843-18040

Check the speed sensor signal.

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

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Follow steps  3 to  6 on the previous page.
3. Read the DTC by following the prompts on the tester screen.

   Please refer to the TOYOTA hand-held tester operator's manual for further details.

   Fig 11: DTC Of Speed Sensor Check Function Chart

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Connect 3 dry batteries of 1.5 V in series.
   Fig 12: Checking 4WD: Deceleration Sensor

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Connect terminal VGS to the batteries' positive (+) terminal, and terminal GGND to the batteries' negative (-) terminal. Apply about 4.5 V to terminals VGS and GGND.
   NOTE: Do not apply voltage of 6 V or more to terminals VGS and GGND.
3. Check the output voltage of terminal GL1.
   OUTPUT VOLTAGE OF TERMINAL GL1
   
   

   Condition	Standard Value
   Horizontal	About 2.3 V
   Lean forward	0.4 V - about 2.3 V
   Lean rearward	About 2.3 V - 4.1 V