Pinout Values and Diagnostic Parameters

3MZ-FE STARTING: SMART KEY SYSTEM: TERMINALS OF ECU

TERMINALS OF ECU

1. CHECK MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)





(a) Disconnect the D7, D8, D9, 1E, 1F and 1M connectors.
(b) Measure the voltage and resistance of the wire harness side connector.





HINT: *1: w/ Power back door
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the connectors.
(d) Measure the voltage of the connector.






(e) Using an oscilloscope, check the signal waveform of the ECU.





(1) Waveform 1





HINT: As the vehicle speed increases, the wavelength shortens.





(2) Waveform 2










(3) Waveform 3






2. CHECK CERTIFICATION ECU





(a) Disconnect the D40 ECU connector.
(b) Measure the voltage and resistance of the wire harness side connector.





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the ECU connector.
(d) Measure the voltage of the connector.





If the result is not as specified, the ECU may have a malfunction.
3. CHECK HYBRID VEHICLE CONTROL ECU





(a) Disconnect the A43, B1, B2, B3 and D35 hybrid vehicle control ECU connectors.
(b) Measure the voltage and resistance of the wire harness side connectors.





If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Reconnect the hybrid vehicle control ECU connectors.
(d) Measure the voltage of the connectors.





HINT: *1: Voltage is output only when the engine is cranking.
If the result is not as specified, the hybrid vehicle control ECU may have a malfunction.






(e) Using an oscilloscope, check the signal waveform of the hybrid vehicle control ECU.





HINT: As the vehicle speed increases, the wavelength shortens.

4. CHECK STEERING LOCK ECU





(a) Disconnect the D11 ECU connector.
(b) Measure the voltage and resistance of the wire harness side connector.





If the result is not as specified, there may be a malfunction on the wire harness side.

(c) Reconnect the D11 ECU connector.
(d) Measure the voltage of the connector.





If the result is not as specified, the ECU may have a malfunction.