Terminals Of Ecu

CHECK INTEGRATION RELAY

Fig 1: Identifying ECU Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the 112 relay connector.
2. Measure the resistance of the wire harness side connector.
  
  Fig 2: ECU Terminals Resistance Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
3. Reconnect the 112 relay connector.
4. Measure the voltage between each terminal and body ground.
  
  Fig 3: ECU Terminals Voltage Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, the integration relay may have a malfunction.
CHECK INSTRUMENT PANEL J/B (INTEGRATION RELAY)

Fig 4: Identifying Instrument Panel J/B (Integration Relay) Connector Terminals
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Inspect the ID, IF, IH and IJ J/B connectors.
2. Measure the resistance of the wire harness side connectors.
  
  Fig 5: Instrument Panel J/B (Integration Relay) Connector Terminals Resistance Chart
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  
  If the result is not as specified, there may be a malfunction on the wire harness side.
3. Reconnect the connectors.
4. Measure the voltage of the connectors.
Fig 6: Instrument Panel J/B (Integration Relay) Connector Terminals Voltage Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

If the result is not as specified, the integration relay or instrument panel J/B may have a malfunction.