ABS Warning Light Remains ON: Procedure

1. Check if a CAN communication system DTC is output. Refer to DIAGNOSIS SYSTEM .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   9 

A: Go to next step 

1. Check if a multiplex communication system DTC is output. Refer to DTC CHECK / CLEAR .

   Result

   Result	Proceed to
   DTC is not output	A
   DTC is output	B

B → See step   10 

A: Go to next step 

1. Check if the skid control ECU connector is securely connected.

   OK

   The connector is securely connected.

NG → See step   11 

OK: Go to next step 

1. Check the battery voltage.

   Standard Voltage

   11 to 14 V

NG → See step   12 

OK: Go to next step 

1. Disconnect the skid control ECU connector.
   Fig 1: Identifying Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the engine switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Switch Condition	Specified Condition
   J77-1 (IG1) - Body ground	Engine switch on (IG)	11 to 14 V

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (IG1 CIRCUIT) 

OK: Go to next step 

1. Turn the engine switch off.
   Fig 2: Identifying Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Disconnect the skid control ECU connectors.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   J78-26 (GND1) - Body ground	Always	Below 1 Ω
   J78-14 (GND2) - Body ground	Always	Below 1 Ω
   A35-22 (GND3) - Body ground	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) 

OK: Go to next step 

1. Reconnect the skid control ECU connectors.
2. Perform the Active Test of the combination meter (meter CPU) using the Techstream. Refer to DATA LIST / ACTIVE TEST .
3. Check the combination meter.

   OK

   The ABS warning light turns on or off in accordance with the Techstream operation.

   HINT: 

   If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part. Refer to PROBLEM SYMPTOMS TABLE .

NG → See step   13 

OK → See step   8