Inspection Procedure 2: The electric motor switch (ON) signal is not received.


caution Whenever the ECU is replaced, ensure that the input signal circuit is normal.






COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors

DIAGNOSIS PROCEDURE


STEP 1. Connector check: B-317 ETACS-ECU connector


Q. Is the check result normal?





STEP 2. Voltage measurement at the B-317 ETACS-ECU connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Turn the electric motor switch to the "ON" position.
(3)Voltage between B-317 ETACS-ECU connector terminal No.68 and body earth
OK: System voltage

Q. Is the check result normal?





STEP 3. Check the wiring harness between B-317 ETACS-ECU connector (terminal 68) and the electric motor switch (IG1).


note Prior to the wiring harness inspection, check joint connector B-05, junction block connectors B-302 and B-303, and repair if necessary.

  • Check the power supply line for open circuit.

Q. Is the check result normal?





STEP 4. M.U.T.-III data list




  • Turn the electric motor switch to the "ON" position.
Item No.
 Item name
 Normal condition
30
 IG SW (IG1) /Power SW(ON)
 ON
OK: Normal condition is displayed.

Q. Is the check result normal?