Inspection Procedure

HINT:

Start the inspection from step  1 in case of using the hand-held tester and start from step  2 in case of no using the hand-held tester.

1. PERFORM ACTIVE TEST BY ABS SOL RELAY 
   1. Check the operation sound of the ABS SOL relay when operating it with the hand-held tester.

      OK: 

      The operation sound of the ABS SOL relay should be heard. 

   OK : Go to step   4 

   NG : Go to Next Step 

2. INSPECT ENGINE ROOM RELAY BLOCK 
   1. Remove the ABS SOL relay from the engine room R/B.
   2. Measure the voltage between terminal 1 of engine room R/B (for ABS SOL relay) and body ground.

      OK: 

      Voltage: 10-14 V 

      Fig 1: Removing ABS SOL Relay From Engine Room R/B

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : CHECK AND REPLACE HARNESS AND CONNECTOR 

   OK : GO TO NEXT STEP 

3. CHECK ABS SOL RELAY 
   1. Check continuity between each terminal of ABS SOL relay.

      OK: 

      CONTINUITY
      
      

      Terminals 3 and 4	Continuity (Reference value 80 Ω)
      Terminals 1 and 2	Open

   2. Apply battery positive voltage between terminals 3 and 4.
   3. Check continuity between each terminal of ABS SOL relay.

      OK: 

      CONTINUITY
      
      

      Terminals 1 and 2

      Continuity

      Fig 2: Checking Continuity Between Terminal Of ABS SOL Relay

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPLACE ABS SOL RELAY 

   OK : GO TO NEXT STEP 

4. INSPECT BRAKE MASTER CYLINDER 
   1. Disconnect the 2 connectors (A4 and A5) from the brake master cylinder.
   2. Check continuity between terminal A4 - 4 and A5 - 1 of brake master cylinder.

      OK: 

      Continuity 

      HINT:

      This is a resistance of 30 - 36 Ω

      Fig 3: Inspecting Brake Master Cylinder

      Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   NG : REPLACE BRAKE MASTER CYLINDER 

   OK : GO TO NEXT STEP 

5. CHECK HARNESS AND CONNECTOR(ENGINE ROOM R/B - BRAKE MASTER CYLINDER) 
   1. Check for open and short circuit in harness and connector between terminal BS of brake master cylinder and engine room R/B (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK : GO TO NEXT STEP 

6. CHECK HARNESS AND CONNECTOR (BRAKE MASTER CYLINDER - SKID CONTROL ECU) 
   1. Check for open and short circuit in harness and connector between terminal AST of brake master cylinder and skid control ECU (See ELECTRONIC CIRCUIT INSPECTION PROCEDURE ).

   NG : REPAIR OR REPLACE HARNESS AND CONNECTOR 

   OK : CHECK EACH CONNECTION IF SAME CODE IS STILL OUTPUT AFTER DTC DELETION (IF NORMAL, THE SKID CONTROL ECU MAY BE DEFECTIVE)