Toyota Corolla (E120): Terminals of ecu

Oscilloscope wave (*1)

Oscilloscope wave (*1)

Hint

:

  • terminal: od – gnd
  • gauge set: 5 v / div, 50 ms / div
  • condition: during cruise control driving o/d switch on.
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    Inspection procedure
    1 Inspect ecm(+b voltage) Turn the ignition switch on.  measure the voltage between the terminals of the e4 and e6 ecm connectors. Standard: 2 Check harness and connector(ecm – body ground) Disconnect the e4 ecm connector. check the resistance between the wire ...

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    Circuit description
    The variable valve timing (vvt) system includes the ecm, the oil control valve (ocv) and the vvt controller. The ecm sends a target ”duty–cycle” control signal to the ocv. This control signal, applied to the ocv, regulates the oil pressure supplied to the vvt controller. Camshaft timin ...