Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus ES 330. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN BUS LINES FOR SHORT (DLC3 SUB BUS LINE)
1. Turn the ignition switch to the LOCK position.
2. Disconnect all wire harness connectors (J16, J17, J18, J19) from the junction connector.
  
  Fig 1: Disconnecting All Wire Harness Connectors (J16, J17, J18, J19)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in Fig 3 below.
  
  Fig 2: Identifying Connector Terminals Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 3: DLC3 Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE DLC3 SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)

OK: Go to next step.
CONNECTION OF CONNECTORS
1. Reconnect all wire harness connectors (J16, J17, J18, J19) to the junction connector.
  
  Fig 4: Reconnect All Wire Harness Connectors (J16, J17, J18, J19)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK CAN BUS LINES FOR SHORT (SKID CONTROL ECU)
1. Disconnect the connector (S1) from the skid control ECU.
2. Measure the resistance according to the value(s) in Fig 6 below.
  
  Fig 5: Identifying Connector Terminals Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 6: DLC3 Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPLACE SKID CONTROL ECU WITH ACTUATOR (SEE REPLACEMENT )

NG: Go to next step.
CHECK CAN BUS LINES FOR SHORT (STEERING SENSOR)
1. Reconnect the connector (S1) to the skid control ECU.
2. Disconnect the connector (S9) from the steering sensor.
3. Measure the resistance according to the value(s) in Fig 8 below.
  
  Fig 7: Identifying Connector Terminals Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 8: DLC3 Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPLACE STEERING SENSOR (SEE REPLACEMENT )

NG: Go to next step.
CHECK CAN BUS LINES FOR SHORT (YAW RATE SENSOR)
1. Reconnect the connector (S9) to the steering sensor.
2. Disconnect the connector (Y1) from the yaw rate sensor.
3. Measure the resistance according to the value(s) in Fig 10 below.
  
  Fig 9: Identifying Connector Terminals Of DLC3
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 10: DLC3 Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
OK: REPLACE YAW RATE SENSOR (SEE REPLACEMENT )

NG: Go to next step.
CHECK CAN BUS LINES FOR SHORT (CAN MAIN BUS LINE)
1. Reconnect the connector (Y1) to the yaw rate sensor.
2. Disconnect all wire harness connectors (J5, J6, J8, J9) from the junction connector.
3. Disconnect the connector (S1) from the skid control ECU.
  
  Fig 11: Disconnecting Wire Harness Connectors (J5, J6, J8, J9)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
4. Measure the resistance according to the value(s) in Fig 13 below.
  
  Fig 12: Identifying Connector Terminals Of Skid Control ECU
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  Standard:
  
  Fig 13: Skid Control ECU Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (CAN-H, CAN-L)

OK: Go to next step.
CHECK CAN BUS LINES FOR SHORT (STEERING SENSOR SUB BUS LINE)
1. Disconnect the connector (S9) from the steering sensor.
2. Measure the resistance according to the value(s) in Fig 15 below.
  Standard:
  
  Fig 15: Steering Sensor Tester Connection Reference Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

HINT: Check all wire harness connectors connected to the junction connector while disconnecting them.

NG: REPAIR OR REPLACE STEERING SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)

OK: REPAIR OR REPLACE YAW RATE SENSOR SUB BUS LINE OR CONNECTOR (CAN-H, CAN-L)