Code No.B210A +B power supply (low input)
Code No.B210B +B power supply (high input)


caution Before replacing the ECU, ensure that the input and output signal circuits are normal.

TROUBLE JUDGMENT



COMMENTS ON TROUBLE SYMPTOM



PROBABLE CAUSES



  • Malfunction of power supply fuse
  • Malfunction of the ETACS-ECU
  • Malfunction of the battery
  • Malfunction of the alternator
  • Malfunction of harness

DIAGNOSIS PROCEDURE


STEP 1. Power supply fuse check


Q. Is the fuse in good condition?





STEP 2. Battery check



Q. Is the battery in good condition?





STEP 3. Charging system check



Q. Is the charging system in good condition?





STEP 4. Connector check: C-406 ETACS-ECU connector


Q. Is the check result normal?





STEP 5. Voltage measurement at the C-406 ETACS-ECU connector.


(1)Disconnect the connector, and measure at the wiring harness side.
(2)Measure the voltage between the C-406 ETACS-ECU connector terminal No. 2 and the body earth.
OK: System voltage

Q. Is the check result normal?





STEP 6. Wiring harness check between the C-406 ETACS-ECU connector terminal No. 2 and the fusible link (36) <petrol> or (38) <diesel>



Q. Is the check result normal?





STEP 7. M.U.T.-III data list




  • Ignition switch: OFF
Item No.
 Item name
 Normal condition
Item 253
 Voltage sensing of IOD Line
 System voltage
OK: Normal condition is displayed.

Q. Is the check result normal?





STEP 8. Check whether the diagnosis code is reset.



(1)Erase the diagnosis code.
(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
(3)Check if diagnosis code is set.

Q. Is the diagnosis code set?