Pinout Values and Diagnostic Parameters

4GR-FSE STARTING: SMART ACCESS SYSTEM WITH PUSH-BUTTON START: TERMINALS OF ECU

TERMINALS OF ECU

1. CHECK POWER SOURCE CONTROL ECU





(a) Disconnect the J55 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 J55 ECU connector.
(d) Measure the voltage of the connector.









HINT:
*1: Voltage is output only when the engine is cranking.
*2: Voltage is output for 0.3 seconds when engine is cranking start. Disconnect the E4 connector from the ECM before measuring the voltage.
*3: A/T
If the result is not as specified, the ECU may have a malfunction.
(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





HINT:
As the engine revolution speed increases, the wavelength shortens.




(3) Waveform 3






2. CHECK CERTIFICATION ECU





(a) Disconnect the P33 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.
3. CHECK ECM





(a) Disconnect the A5, E5, E4, E3 and E6 ECM 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 A5, E5, E4, E3 and E6 ECM connectors.
(d) Measure the voltage of the connectors.





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





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





HINT:
As the engine revolution speed increases, the wavelength shortens.

4. CHECK STEERING LOCK ECU





(a) Disconnect the J29 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 J29 ECU connector.
(d) Measure the voltage of the connector.





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