Terminals Of Ecu

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

CHECK GATEWAY ECU

Fig 1: Identifying Terminals Of ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the G3 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 2: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK ENGINE ROOM NO. 2 RELAY BLOCK

Fig 3: Checking Engine Room No. 2 Relay Block
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 4: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
CHECK DRIVER SIDE J/B ECU

Fig 5: Checking Driver Side J/B ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the DA and DG J/B connectors.
2. Disconnect the D3 and D5 ECU connectors.
3. Measure the resistance and voltage of each terminal of the wire harness side connector.
  Standard:
  
  Fig 6: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK PASSENGER SIDE J/B ECU

Fig 7: Checking Passenger Side J/B ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the PB, PE, PG and PH J/B connectors.
2. Disconnect the P4 and P5 ECU connectors.
3. Measure the resistance and voltage of each terminal of the wire harness side connector.
  Standard:
  
  Fig 8: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK LUGGAGE ROOM J/B ECU

Fig 9: Checking Luggage Room J/B ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the LA and LF J/B connectors.
2. Disconnect the L14 ECU connector.
3. Measure the resistance and voltage of each terminal of the wire harness side connector.
  Standard:
  
  Fig 10: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, the wire harness side may have a malfunction.
CHECK THEFT DETERRENT ECU

Fig 11: Checking Theft Deterrent ECU2
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the T5 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 12: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK TRANSPONDER KEY ECU (WITHOUT SMART KEY SYSTEM)

Fig 13: Disconnecting T9 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the T9 ECU connector.
2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.
  Standard:
  
  Fig 14: Symbols Specification (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 15: Symbols Specification (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK CLEARANCE WARNING ECU ASSY (CLEARANCE SONAR ECU)

Fig 16: Disconnecting C17 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the C17 ECU connector.
2. Measure the voltage and resistance between each terminal of the wire harness side connector and body ground.
  Standard:
  
  Fig 17: Terminal Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK ACCESSORY BUS BUFFER

Fig 18: Symbols Specification
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the T15 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 19: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK AFS ECU

Fig 20: Identifying AFS ECU
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the A39 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 21: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK DRIVER DOOR ECU

Fig 22: Disconnecting D25 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the D25 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 23: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK (FRONT) PASSENGER DOOR ECU

Fig 24: Disconnecting F17 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the F17 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 25: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR DOOR LH ECU

Fig 26: Disconnecting R13 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the R13 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 27: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR DOOR RH ECU

Fig 28: Disconnecting R14 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the R14 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 29: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK DRIVER SEAT ECU

Fig 30: Disconnecting D27 And D28 ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the D27 and D28 ECU connectors.
2. Measure the voltage of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 31: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR LH SEAT ECU

Fig 32: Disconnecting R25 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the R25 ECU connector.
2. Measure the voltage of each terminal of the wire harness side connector.
  Standard:
  
  Fig 33: Symbols Specification (1 Of 2)
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 34: Symbols Specification (2 Of 2)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK REAR RH SEAT ECU

Fig 35: Disconnecting R26 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the R26 ECU connector.
2. Measure the voltage of each terminal of the wire harness side connector.
  Standard:
  
  Fig 36: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK AIR CONDITIONER AMPLIFIER (A/C ECU)

Fig 37: Disconnecting A11 Amplifier Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the A11 amplifier connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 38: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not and specified, there may be a malfunction on the wire harness side.
CHECK AIRBAG SENSOR ASSY CENTER

Fig 39: Disconnecting A24 Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the A24 sensor connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 40: Terminal Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK COMBINATION METER ASSY

Fig 41: Disconnecting C12 Meter Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the C12 meter connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 42: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK SLIDING ROOF DRIVE GEAR ASSY (MOON ROOF CONTROL ECU)

Fig 43: Disconnecting M6 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the M6 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 44: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK RAIN SENSOR

Fig 45: Disconnecting R6 Sensor Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the R6 sensor connector.
2. Check the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 46: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK STEERING PAD SWITCH

Fig 47: Disconnecting C13 Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the C13 switch connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 48: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK POWER TILT AND POWER TELESCOPIC

Fig 49: Disconnecting P8 And P9 ECU Connectors
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the P8 and P9 ECU connectors.
2. Measure the voltage and resistance of each terminal of the wire harness side connectors.
  Standard:
  
  Fig 50: Terminal Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK STEERING LOCK ECU

Fig 51: Disconnecting S46 ECU Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the S46 ECU connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 52: Terminal Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
If the result is not as specified, there may be a malfunction on the wire harness side.
CHECK COMBINATION SWITCH

Fig 53: Disconnecting C14 Switch Connector
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the C14 switch connector.
2. Measure the voltage and resistance of each terminal of the wire harness side connector.
  Standard:
  
  Fig 54: Symbols Specification
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
The result is not as specified, there may be a malfunction on the wire harness side.