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Home >> Toyota >> 2005 >> Avalon XLS >> Repair and Diagnosis >> Brakes >> Traction Control >> Brakes - Abs With EBD & BA & TRAC & VSC (Diagnostics) >> DTC C0273/13, C0274/14, C1361/91: Open/Short Circuit In Abs Motor Relay Circuit & Short Circuit In Abs Motor Fail Safe Relay Circuit >> Inspection Procedure

Inspection Procedure

NOTE: When replacing the ABS & TRACTION actuator assy, perform zero point calibration (see CALIBRATION  ).
  1. INSPECT FUSE (ABS/VSC NO. 1 FUSE) 
    1. Remove the ABS/VSC No. 1 fuse from the engine room R/B.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 1: Identifying ABS/VSC No. 1 Fuse Location
    G02976577Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    ABS/VSC NO. 1 FUSE RESISTANCE

    ABS/VSC No. 1 fuse Below 1 Ω (Continuity)
    1. NG: CHECK FOR SHORT IN ALL HARNESS AND CONNECTOR CONNECTED TO FUSE AND REPLACE FUSE 
    2. OK: Go to next step. 
  2. INSPECT VSC NO. 2 RELAY 
    1. Remove the VSC No. 2 relay.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 2: Identifying VSC No. 2 Relay Terminals
    G02976578Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    1 - 2 Always 80 Ω (Continuity)
    3 - 5 Always 10 kΩ or higher (No continuity)
    3 - 5 Apply B+ between terminal 1 and 2 Below 1 Ω (Continuity)
    1. NG: REPLACE VSC NO. 2 RELAY 
    2. OK: Go to next step. 
  3. INSPECT VSC NO. 1 RELAY 
    1. Remove the VSC No. 1 relay.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 3: Identifying VSC No. 1 Relay Terminals
    G02976579Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    1 - 2 Always 100 Ω (Continuity)
    3 - 5 Always 10 kΩ or higher (No continuity)
    3 - 5 Apply B+ between terminal 1 and 2 Below 1 Ω (Continuity)
    1. NG: REPLACE VSC NO. 1 RELAY 
    2. OK: Go to next step. 
  4. INSPECT ENGINE ROOM R/B No. 3 (VSC NO. 1 RELAY POWER SOURCE CIRCUIT) 
    1. Remove the VSC No. 1 relay from the engine room R/B No. 3.
    2. Turn the ignition switch on (IG).
    3. Measure the voltage according to the value(s) in the table below.
    Fig 4: Identifying VSC No. 1 Relay Location In Engine Room R/B No. 3
    G02976580Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Condition Specified Condition
    VSC No. 1 relay terminal 5 - Body ground Ignition switch on (IG) 10 to 14 V
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT) 
    2. OK: Go to next step. 
  5. INSPECT ENGINE ROOM R/B No. 3 
    1. Remove the VSC No. 1 and No. 2 relays.
    2. Measure the resistance according to the value(s) in the table below.
    Fig 5: Identifying VSC No. 1 & No. 2 Relays Location
    G02976581Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Specified Condition
    VSC No. 1 relay terminal 1 - VSC No. 2 relay terminal 1 Below 1 Ω
    VSC No. 1 relay terminal 3 - VSC No. 2 relay terminal 5 Below 1 Ω
    1. NG: REPAIR OR REPLACE ENGINE ROOM R/B No. 3 
    2. OK: Go to next step. 
  6. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU TO ENGINE ROOM R/B No. 3) (SEE  ELECTRONIC CIRCUIT INSPECTION PROCEDURE  ) 
    1. Disconnect the skid control ECU connector.
    2. Remove the VSC No. 1 relay and VSC No. 2 relay from the engine room R/B No. 3.
    3. Measure the resistance according to the value(s) in the table below.
      Fig 6: Identifying Skid Control ECU Connector & VSC No. 1 Relay & VSC No. 2 Relay Terminals
      G02976582Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

      Standard: 

      TESTER CONNECTION AND SPECIFIED CONDITION

      Tester Connection Specified Condition
      A34-2 (BM) - VSC No. 2 relay 3 Below 1 Ω
      A34-14 (MRF) - VSC No. 1 relay 2 Below 1 Ω
      A34-15 (MR) - VSC No. 2 relay 2 Below 1 Ω
      A34-45 (R+) - VSC No. 1 relay 1 Below 1 Ω
      A34-45 (R+) - VSC No. 2 relay 1 Below 1 Ω
    4. Measure the resistance according to the value(s) in the table below. (See Fig 6)

    Standard: 

    TESTER CONNECTION AND SPECIFIED CONDITION

    Tester Connection Specified Condition
    A34-2 (BM) - Body ground 10 kΩ or higher
    A34-14 (MRF) - Body ground 10 kΩ or higher
    A34-15 (MR) - Body ground 10 kΩ or higher
    A34-45 (R+) - Body ground 10 kΩ or higher
    1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 
    2. OK: Go to next step. 
  7. RECONFIRM DTC (SEE  DTC CHECK/CLEAR   ) 
    1. Clear the DTC.
    2. Start the engine.
    3. Drive the vehicle at the speed of 4 mph (6 km/h) or more.
    4. Check that the same DTC is recorded.

    HINT:

    Reinstall the sensors, connectors, etc. and restore the vehicle to its prior conditions before rechecking for DTCs.

    Result: 

    RESULT

    DTC is not output A
    DTC is output B

    HINT:

    • If a speed signal of 4 mph (6 km/h) or more is input to the skid control ECU, with the ignition switch on (IG) and the stop light switch off, the ECU performs self diagnosis of the motor and solenoid circuits.
    • If the normal system code is output (the trouble code is not output), slightly jiggle the connectors, wire harness, and fuses of the ABS & TRACTION actuator assy. Make sure that no DTCs are output.
    • If any DTCs are output while jiggling a connector or wire harness of the ABS & TRACTION actuator (skid control ECU), inspect and repair the connector or wire harness.
    1. B: REPLACE ABS & TRACTION ACTUATOR ASSY (SEE  REPLACEMENT  ) 
    2. A: END 

    HINT:

    It is suspected that the DTCs were output due to a bad connection of the connector terminal.

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