Inspection Procedure

WARNING: This page is about a different car, the 2004 Toyota Corolla. However, it is still accessible from the selected car via links, so may be relevant.

RECONFIRM DTC
1. Check the DTC (See PRE-CHECK ).
1. YES: REPAIR CIRCUIT INDICATED BY OUTPUT CODE
2. NO: GO TO NEXT STEP.
INSPECT SKID CONTROL ECU CONNECTOR SECURELY CONNECTED
1. NO: CONNECT CONNECTOR TO ECU
2. YES: GO TO NEXT STEP.
INSPECT SKID CONTROL ECU CONNECTOR (IG1 TERMINAL VOLTAGE)
IN CASE OF USING HAND-HELD TESTER:
1. Check the voltage condition output from the ECU displayed on the hand-held tester.
  OK:
  
  "Normal" is displayed.
  
  Fig 1: Identifying Terminals IG1 (3) And GND (1, 23) Of Skid Control ECU Connector
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
IN CASE OF NOT USING HAND-HELD TESTER:
1. Disconnect the skid control ECU connector.
2. Turn the ignition switch to ON.
3. Measure voltage between terminals IG1 (3) and GND (1, 23) of skid control ECU harness side connector.
  OK:
  
  oltage: 10 - 14 V
1. OK: Go to step 5
2. NG: GO TO NEXT STEP.
INSPECT SKID CONTROL ECU CONNECTOR (GND TERMINAL CONTINUITY)
1. Measure resistance between terminal GND (S1-2, 24) of skid control ECU harness side connector and body ground.
  Resistance: 1 Ω or less
  
  Fig 2: Identifying Terminal GND (S1-2, 24) Of Skid Control ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: CHECK AND REPAIR HARNESS AND CONNECTOR
GO TO COMBINATION METER SYSTEM (ABS WARNING LIGHT)
1. Disconnect the skid control ECU connector.
2. Using service wire, connect terminals WA (30) and GND (1, 23) of skid control ECU harness side connector.
3. Turn the ignition switch to ON.
  OK:
  
  ABS warning light goes off.
  
  Fig 3: Identifying Terminals WA (30) And GND (1, 23) Of Skid Control ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE COMBINATION METER ASSEMBLY
2. OK: CHECK AND REPLACE BRAKE ACTUATOR ASSY (See TERMINALS OF ECU )