Inspection Procedure

NOTE: Start the inspection from step 1 in case of using the LEXUS hand held tester and start from step 2 in case of not using the LEXUS hand held tester.

DO ACTIVE TEST OF ABS SOLENOIDO RELAY
1. Check the operation sound of the ABS solenoid relay when operating it with the LEXUS hand held tester.
  OK:
  
  The operation sound of the ABS solenoid relay should be heard.
1. OK: Go to step 4
2. NG: Go to next step.
INSPECT ENGINE ROOM RELAY BLOCK NO. 2
1. Remove the ABS solenoid relay from the engine room R/B No. 2.
2. Measure the voltage between terminal 3 of engine room R/B No. 2 (for ABS solenoid relay) and body ground.
  OK:
  
  Voltage: 10 - 14V
Fig 1: Removing ABS Solenoid Relay From Engine Room R/B No. 2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: CHECK AND REPLACE HARNESS AND CONNECTOR
2. OK: Go to next step.

CHECK ABS SOLENOID RELAY

Check continuity between each terminal of ABS solenoid relay.

OK:

ABS SOLENOID RELAY TERMINALS CONTINUITY SPECIFICATIONS

Terminals 4 and 6	Continuity (Reference value 80 Ω)
Terminals 1 and 3	Open

Apply battery positive voltage between terminals 4 and 6.
Check continuity between each terminal of ABS solenoid relay.
OK:
ABS SOLENOID RELAY TERMINALS CONTINUITY SPECIFICATIONS

Terminals 1 and 3 Continuity

Fig 2: Checking Continuity Between ABS Solenoid Relay Terminals

NG: REPLACE ABS SOLENOID RELAY
OK: Go to next step.

INSPECT BRAKE MASTER CYLINDER SUB-ASSY
1. Disconnect the 2 connectors (B1 and B2) from the brake master cylinder.
2. Check continuity between terminal B1 - 4 and B2 - 1 of brake master cylinder.
  OK:
  
  Continuity
NOTE: This is a resistance of 30 - 36 Ω

Fig 3: Disconnecting Connectors B1 & B2 From Brake Master Cylinder
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPLACE BRAKE MASTER CYLINDER SUB-ASSY
2. OK: Go to next step.
CHECK HARNESS AND CONNECTOR(ENGINE ROOM R/B NO. 2 - 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 No. 2.
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: Go to next step.
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.
1. NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
2. OK: CHECK EACH CONNECTION IF SAME CODE SS STILL OUTPUT AFTER DTC DELETION (IF NORMAL, THE ECU MAY BE DEFECTIVE.)